/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:10:13,038 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:10:13,123 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 13:10:13,127 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:10:13,127 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:10:13,156 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:10:13,156 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:10:13,157 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:10:13,157 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:10:13,161 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:10:13,161 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:10:13,161 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:10:13,161 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:10:13,162 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:10:13,163 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:10:13,163 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:10:13,163 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:10:13,163 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:10:13,163 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:10:13,164 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:10:13,164 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:10:13,165 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:10:13,165 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:10:13,165 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:10:13,165 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:10:13,166 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:10:13,166 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:10:13,166 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:10:13,166 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:10:13,166 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:10:13,167 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:10:13,167 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:10:13,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:10:13,168 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:10:13,168 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:10:13,168 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:10:13,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:10:13,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:10:13,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:10:13,496 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:10:13,497 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:10:13,498 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c [2023-08-26 13:10:14,729 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:10:14,941 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:10:14,941 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c [2023-08-26 13:10:14,947 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35539bd06/ec8cf1fc120e4863850eb58cd09fe7ba/FLAGbe2fdfbce [2023-08-26 13:10:14,957 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35539bd06/ec8cf1fc120e4863850eb58cd09fe7ba [2023-08-26 13:10:14,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:10:14,960 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:10:14,961 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:10:14,961 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:10:14,963 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:10:14,964 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:10:14" (1/1) ... [2023-08-26 13:10:14,965 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4262023e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:10:14, skipping insertion in model container [2023-08-26 13:10:14,965 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:10:14" (1/1) ... [2023-08-26 13:10:14,981 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:10:15,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:10:15,111 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:10:15,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:10:15,146 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:10:15,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:10:15 WrapperNode [2023-08-26 13:10:15,146 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:10:15,147 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:10:15,147 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:10:15,148 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:10:15,153 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:10:15" (1/1) ... [2023-08-26 13:10:15,166 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:10:15" (1/1) ... [2023-08-26 13:10:15,191 INFO L138 Inliner]: procedures = 22, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-08-26 13:10:15,191 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:10:15,193 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:10:15,193 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:10:15,193 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:10:15,200 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:10:15" (1/1) ... [2023-08-26 13:10:15,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:10:15" (1/1) ... [2023-08-26 13:10:15,206 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:10:15" (1/1) ... [2023-08-26 13:10:15,207 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:10:15" (1/1) ... [2023-08-26 13:10:15,221 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:10:15" (1/1) ... [2023-08-26 13:10:15,224 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:10:15" (1/1) ... [2023-08-26 13:10:15,225 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:10:15" (1/1) ... [2023-08-26 13:10:15,225 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:10:15" (1/1) ... [2023-08-26 13:10:15,227 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:10:15,228 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:10:15,228 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:10:15,228 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:10:15,229 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:10:15" (1/1) ... [2023-08-26 13:10:15,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:10:15,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:15,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 13:10:15,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 13:10:15,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:10:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:10:15,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:10:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:10:15,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:10:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 13:10:15,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 13:10:15,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:10:15,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:10:15,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:10:15,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:10:15,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:10:15,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:10:15,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:10:15,300 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 13:10:15,407 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:10:15,409 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:10:15,626 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:10:15,632 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:10:15,632 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 13:10:15,634 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:10:15 BoogieIcfgContainer [2023-08-26 13:10:15,634 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:10:15,636 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:10:15,636 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:10:15,639 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:10:15,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:10:14" (1/3) ... [2023-08-26 13:10:15,640 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738c4ef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:10:15, skipping insertion in model container [2023-08-26 13:10:15,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:10:15" (2/3) ... [2023-08-26 13:10:15,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738c4ef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:10:15, skipping insertion in model container [2023-08-26 13:10:15,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:10:15" (3/3) ... [2023-08-26 13:10:15,642 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2023-08-26 13:10:15,656 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:10:15,656 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-26 13:10:15,656 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:10:15,749 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 13:10:15,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 121 transitions, 266 flow [2023-08-26 13:10:15,873 INFO L124 PetriNetUnfolderBase]: 7/118 cut-off events. [2023-08-26 13:10:15,873 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:10:15,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 118 events. 7/118 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 123 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-08-26 13:10:15,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 121 transitions, 266 flow [2023-08-26 13:10:15,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 107 transitions, 232 flow [2023-08-26 13:10:15,884 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:10:15,893 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 107 transitions, 232 flow [2023-08-26 13:10:15,896 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 107 transitions, 232 flow [2023-08-26 13:10:15,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 232 flow [2023-08-26 13:10:15,920 INFO L124 PetriNetUnfolderBase]: 7/107 cut-off events. [2023-08-26 13:10:15,920 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:10:15,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 107 events. 7/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 122 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-08-26 13:10:15,923 INFO L119 LiptonReduction]: Number of co-enabled transitions 1914 [2023-08-26 13:10:19,304 INFO L134 LiptonReduction]: Checked pairs total: 1930 [2023-08-26 13:10:19,304 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-26 13:10:19,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:10:19,322 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;@2eb9b09a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:10:19,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-26 13:10:19,323 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:10:19,323 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 13:10:19,323 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:10:19,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:19,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:10:19,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:19,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:19,328 INFO L85 PathProgramCache]: Analyzing trace with hash 449, now seen corresponding path program 1 times [2023-08-26 13:10:19,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:19,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166975382] [2023-08-26 13:10:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:19,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:19,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:19,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166975382] [2023-08-26 13:10:19,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166975382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:19,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:19,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:10:19,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53767778] [2023-08-26 13:10:19,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:19,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:10:19,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:19,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:10:19,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:10:19,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 228 [2023-08-26 13:10:19,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 86 flow. Second operand has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:19,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:19,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 228 [2023-08-26 13:10:19,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:19,601 INFO L124 PetriNetUnfolderBase]: 578/785 cut-off events. [2023-08-26 13:10:19,601 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-26 13:10:19,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 785 events. 578/785 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2769 event pairs, 263 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 1257. Up to 777 conditions per place. [2023-08-26 13:10:19,610 INFO L140 encePairwiseOnDemand]: 226/228 looper letters, 29 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2023-08-26 13:10:19,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 140 flow [2023-08-26 13:10:19,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:10:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:10:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 251 transitions. [2023-08-26 13:10:19,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5504385964912281 [2023-08-26 13:10:19,622 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 251 transitions. [2023-08-26 13:10:19,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 251 transitions. [2023-08-26 13:10:19,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:19,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 251 transitions. [2023-08-26 13:10:19,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 125.5) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:19,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:19,632 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:19,633 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 86 flow. Second operand 2 states and 251 transitions. [2023-08-26 13:10:19,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 32 transitions, 140 flow [2023-08-26 13:10:19,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 13:10:19,637 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 70 flow [2023-08-26 13:10:19,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-08-26 13:10:19,642 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-26 13:10:19,642 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 70 flow [2023-08-26 13:10:19,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:19,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:19,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:10:19,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:10:19,643 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:19,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:19,643 INFO L85 PathProgramCache]: Analyzing trace with hash 439454, now seen corresponding path program 1 times [2023-08-26 13:10:19,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:19,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730169094] [2023-08-26 13:10:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:19,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:19,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:19,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730169094] [2023-08-26 13:10:19,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730169094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:19,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:19,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:10:19,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190240020] [2023-08-26 13:10:19,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:19,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:10:19,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:19,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:10:19,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:10:19,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:10:19,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:19,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:19,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:10:19,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:19,972 INFO L124 PetriNetUnfolderBase]: 551/746 cut-off events. [2023-08-26 13:10:19,972 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:10:19,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1499 conditions, 746 events. 551/746 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2565 event pairs, 250 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 1496. Up to 737 conditions per place. [2023-08-26 13:10:19,976 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-26 13:10:19,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 120 flow [2023-08-26 13:10:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:10:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:10:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2023-08-26 13:10:19,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283625730994152 [2023-08-26 13:10:19,979 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2023-08-26 13:10:19,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2023-08-26 13:10:19,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:19,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2023-08-26 13:10:19,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:19,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:19,984 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:19,984 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 293 transitions. [2023-08-26 13:10:19,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 120 flow [2023-08-26 13:10:19,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:10:19,985 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 68 flow [2023-08-26 13:10:19,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-08-26 13:10:19,986 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-26 13:10:19,986 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 68 flow [2023-08-26 13:10:19,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:19,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:19,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:10:19,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:10:19,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:19,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:19,987 INFO L85 PathProgramCache]: Analyzing trace with hash 439453, now seen corresponding path program 1 times [2023-08-26 13:10:19,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:19,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474526505] [2023-08-26 13:10:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:19,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:20,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:20,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474526505] [2023-08-26 13:10:20,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474526505] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:20,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:20,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:10:20,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871519317] [2023-08-26 13:10:20,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:20,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:10:20,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:20,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:10:20,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:10:20,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 228 [2023-08-26 13:10:20,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:20,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 228 [2023-08-26 13:10:20,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:20,146 INFO L124 PetriNetUnfolderBase]: 524/707 cut-off events. [2023-08-26 13:10:20,146 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:10:20,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1423 conditions, 707 events. 524/707 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2411 event pairs, 237 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 1419. Up to 698 conditions per place. [2023-08-26 13:10:20,150 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 24 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-26 13:10:20,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 114 flow [2023-08-26 13:10:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:10:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:10:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-08-26 13:10:20,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41228070175438597 [2023-08-26 13:10:20,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-08-26 13:10:20,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-08-26 13:10:20,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:20,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-08-26 13:10:20,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,157 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 68 flow. Second operand 3 states and 282 transitions. [2023-08-26 13:10:20,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 114 flow [2023-08-26 13:10:20,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:20,158 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 65 flow [2023-08-26 13:10:20,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-26 13:10:20,159 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -8 predicate places. [2023-08-26 13:10:20,159 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 65 flow [2023-08-26 13:10:20,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:20,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:10:20,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:10:20,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:20,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:20,160 INFO L85 PathProgramCache]: Analyzing trace with hash 422323192, now seen corresponding path program 1 times [2023-08-26 13:10:20,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:20,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121357866] [2023-08-26 13:10:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:20,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:20,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:20,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121357866] [2023-08-26 13:10:20,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121357866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:20,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:20,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:10:20,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169322008] [2023-08-26 13:10:20,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:20,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:10:20,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:20,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:10:20,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:10:20,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 228 [2023-08-26 13:10:20,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:20,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 228 [2023-08-26 13:10:20,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:20,294 INFO L124 PetriNetUnfolderBase]: 498/669 cut-off events. [2023-08-26 13:10:20,294 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:10:20,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 669 events. 498/669 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2226 event pairs, 225 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 1344. Up to 660 conditions per place. [2023-08-26 13:10:20,298 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 22 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-26 13:10:20,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 107 flow [2023-08-26 13:10:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:10:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:10:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-26 13:10:20,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4093567251461988 [2023-08-26 13:10:20,299 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-26 13:10:20,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-26 13:10:20,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:20,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-26 13:10:20,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,303 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 65 flow. Second operand 3 states and 280 transitions. [2023-08-26 13:10:20,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 107 flow [2023-08-26 13:10:20,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:20,304 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 62 flow [2023-08-26 13:10:20,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-26 13:10:20,305 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -9 predicate places. [2023-08-26 13:10:20,305 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 62 flow [2023-08-26 13:10:20,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:20,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:10:20,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:10:20,305 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:20,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:20,306 INFO L85 PathProgramCache]: Analyzing trace with hash 422323194, now seen corresponding path program 1 times [2023-08-26 13:10:20,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:20,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582528027] [2023-08-26 13:10:20,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:20,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:20,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:20,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582528027] [2023-08-26 13:10:20,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582528027] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:20,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:20,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:10:20,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104769744] [2023-08-26 13:10:20,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:20,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:10:20,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:20,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:10:20,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:10:20,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:10:20,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:20,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:10:20,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:20,421 INFO L124 PetriNetUnfolderBase]: 472/631 cut-off events. [2023-08-26 13:10:20,422 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:10:20,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 631 events. 472/631 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2054 event pairs, 213 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 1269. Up to 622 conditions per place. [2023-08-26 13:10:20,428 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 20 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-26 13:10:20,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 24 transitions, 100 flow [2023-08-26 13:10:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:10:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:10:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-08-26 13:10:20,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195906432748538 [2023-08-26 13:10:20,434 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-08-26 13:10:20,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-08-26 13:10:20,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:20,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-08-26 13:10:20,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,438 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,438 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 62 flow. Second operand 3 states and 287 transitions. [2023-08-26 13:10:20,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 24 transitions, 100 flow [2023-08-26 13:10:20,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:20,440 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 59 flow [2023-08-26 13:10:20,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-08-26 13:10:20,442 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -10 predicate places. [2023-08-26 13:10:20,442 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 59 flow [2023-08-26 13:10:20,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:20,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:20,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:10:20,443 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:20,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2125672564, now seen corresponding path program 1 times [2023-08-26 13:10:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:20,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793557354] [2023-08-26 13:10:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:20,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:20,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:20,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793557354] [2023-08-26 13:10:20,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793557354] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:20,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:20,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:10:20,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362862828] [2023-08-26 13:10:20,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:20,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:10:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:20,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:10:20,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:10:20,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:10:20,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:20,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:10:20,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:20,568 INFO L124 PetriNetUnfolderBase]: 370/502 cut-off events. [2023-08-26 13:10:20,568 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:10:20,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 502 events. 370/502 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1580 event pairs, 165 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 1012. Up to 493 conditions per place. [2023-08-26 13:10:20,571 INFO L140 encePairwiseOnDemand]: 226/228 looper letters, 19 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-26 13:10:20,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 23 transitions, 97 flow [2023-08-26 13:10:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:10:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:10:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-08-26 13:10:20,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-26 13:10:20,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-08-26 13:10:20,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-08-26 13:10:20,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:20,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-08-26 13:10:20,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,577 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,578 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 59 flow. Second operand 3 states and 285 transitions. [2023-08-26 13:10:20,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 23 transitions, 97 flow [2023-08-26 13:10:20,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 23 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:20,579 INFO L231 Difference]: Finished difference. Result has 31 places, 23 transitions, 58 flow [2023-08-26 13:10:20,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=23} [2023-08-26 13:10:20,581 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -10 predicate places. [2023-08-26 13:10:20,584 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 58 flow [2023-08-26 13:10:20,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:20,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:20,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:10:20,585 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:20,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2125672565, now seen corresponding path program 1 times [2023-08-26 13:10:20,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:20,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428647882] [2023-08-26 13:10:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:20,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:20,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:20,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428647882] [2023-08-26 13:10:20,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428647882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:20,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:20,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:10:20,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059616667] [2023-08-26 13:10:20,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:20,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:10:20,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:20,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:10:20,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:10:20,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 228 [2023-08-26 13:10:20,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 23 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 80.4) internal successors, (402), 5 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:20,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 228 [2023-08-26 13:10:20,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:20,786 INFO L124 PetriNetUnfolderBase]: 268/373 cut-off events. [2023-08-26 13:10:20,786 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:10:20,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 373 events. 268/373 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1093 event pairs, 117 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 755. Up to 364 conditions per place. [2023-08-26 13:10:20,788 INFO L140 encePairwiseOnDemand]: 226/228 looper letters, 18 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-26 13:10:20,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 94 flow [2023-08-26 13:10:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:10:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:10:20,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-26 13:10:20,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757309941520468 [2023-08-26 13:10:20,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-26 13:10:20,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-26 13:10:20,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:20,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-26 13:10:20,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 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 13:10:20,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,793 INFO L175 Difference]: Start difference. First operand has 31 places, 23 transitions, 58 flow. Second operand 3 states and 257 transitions. [2023-08-26 13:10:20,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 94 flow [2023-08-26 13:10:20,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:20,794 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 57 flow [2023-08-26 13:10:20,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2023-08-26 13:10:20,794 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -10 predicate places. [2023-08-26 13:10:20,794 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 57 flow [2023-08-26 13:10:20,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.4) internal successors, (402), 5 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:20,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:20,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:10:20,795 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:20,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:20,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1768087474, now seen corresponding path program 1 times [2023-08-26 13:10:20,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:20,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440044763] [2023-08-26 13:10:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:20,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:20,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:20,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440044763] [2023-08-26 13:10:20,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440044763] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:20,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:20,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:10:20,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109138595] [2023-08-26 13:10:20,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:20,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:10:20,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:20,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:10:20,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:10:20,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 228 [2023-08-26 13:10:20,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:20,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:20,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 228 [2023-08-26 13:10:20,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:21,055 INFO L124 PetriNetUnfolderBase]: 359/506 cut-off events. [2023-08-26 13:10:21,056 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 13:10:21,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 506 events. 359/506 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1604 event pairs, 39 based on Foata normal form. 1/308 useless extension candidates. Maximal degree in co-relation 1028. Up to 421 conditions per place. [2023-08-26 13:10:21,059 INFO L140 encePairwiseOnDemand]: 223/228 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2023-08-26 13:10:21,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 164 flow [2023-08-26 13:10:21,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:10:21,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:10:21,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-08-26 13:10:21,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043859649122807 [2023-08-26 13:10:21,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-08-26 13:10:21,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-08-26 13:10:21,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:21,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-08-26 13:10:21,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:21,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:21,064 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:21,064 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 57 flow. Second operand 3 states and 345 transitions. [2023-08-26 13:10:21,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 164 flow [2023-08-26 13:10:21,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:21,065 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 82 flow [2023-08-26 13:10:21,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-08-26 13:10:21,066 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -8 predicate places. [2023-08-26 13:10:21,066 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 82 flow [2023-08-26 13:10:21,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:21,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:21,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:21,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:10:21,067 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:21,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:21,067 INFO L85 PathProgramCache]: Analyzing trace with hash -523653755, now seen corresponding path program 1 times [2023-08-26 13:10:21,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:21,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43046508] [2023-08-26 13:10:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:21,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:21,275 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 13:10:21,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:21,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43046508] [2023-08-26 13:10:21,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43046508] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:21,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:21,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:10:21,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336809455] [2023-08-26 13:10:21,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:21,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:10:21,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:21,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:10:21,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:10:21,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:10:21,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:10:21,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:21,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:10:21,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:21,513 INFO L124 PetriNetUnfolderBase]: 597/900 cut-off events. [2023-08-26 13:10:21,513 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2023-08-26 13:10:21,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2182 conditions, 900 events. 597/900 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3299 event pairs, 166 based on Foata normal form. 6/906 useless extension candidates. Maximal degree in co-relation 2177. Up to 420 conditions per place. [2023-08-26 13:10:21,518 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 69 selfloop transitions, 8 changer transitions 3/80 dead transitions. [2023-08-26 13:10:21,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 80 transitions, 399 flow [2023-08-26 13:10:21,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:10:21,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:10:21,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 689 transitions. [2023-08-26 13:10:21,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317042606516291 [2023-08-26 13:10:21,521 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 689 transitions. [2023-08-26 13:10:21,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 689 transitions. [2023-08-26 13:10:21,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:21,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 689 transitions. [2023-08-26 13:10:21,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.42857142857143) internal successors, (689), 7 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:21,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:21,525 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:21,525 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 82 flow. Second operand 7 states and 689 transitions. [2023-08-26 13:10:21,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 80 transitions, 399 flow [2023-08-26 13:10:21,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 80 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:21,529 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 147 flow [2023-08-26 13:10:21,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=147, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2023-08-26 13:10:21,530 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-26 13:10:21,531 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 147 flow [2023-08-26 13:10:21,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:10:21,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:21,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:21,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 13:10:21,531 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:21,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:21,532 INFO L85 PathProgramCache]: Analyzing trace with hash 989131395, now seen corresponding path program 2 times [2023-08-26 13:10:21,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:21,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284248844] [2023-08-26 13:10:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:21,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:21,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:21,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284248844] [2023-08-26 13:10:21,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284248844] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:21,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354532396] [2023-08-26 13:10:21,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:10:21,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:21,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:21,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:10:21,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 13:10:21,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:10:21,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:21,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-26 13:10:21,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:22,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:22,394 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 13:10:22,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354532396] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:22,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 13:10:22,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 16 [2023-08-26 13:10:22,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735467918] [2023-08-26 13:10:22,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:22,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:10:22,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:22,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:10:22,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:10:22,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-26 13:10:22,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 147 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 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 13:10:22,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:22,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-26 13:10:22,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:22,751 INFO L124 PetriNetUnfolderBase]: 816/1236 cut-off events. [2023-08-26 13:10:22,751 INFO L125 PetriNetUnfolderBase]: For 1571/1625 co-relation queries the response was YES. [2023-08-26 13:10:22,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4065 conditions, 1236 events. 816/1236 cut-off events. For 1571/1625 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5092 event pairs, 172 based on Foata normal form. 6/1238 useless extension candidates. Maximal degree in co-relation 4055. Up to 398 conditions per place. [2023-08-26 13:10:22,761 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 96 selfloop transitions, 18 changer transitions 1/116 dead transitions. [2023-08-26 13:10:22,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 116 transitions, 714 flow [2023-08-26 13:10:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 13:10:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 13:10:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 839 transitions. [2023-08-26 13:10:22,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45997807017543857 [2023-08-26 13:10:22,764 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 839 transitions. [2023-08-26 13:10:22,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 839 transitions. [2023-08-26 13:10:22,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:22,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 839 transitions. [2023-08-26 13:10:22,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 104.875) internal successors, (839), 8 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 13:10:22,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:22,770 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:22,770 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 147 flow. Second operand 8 states and 839 transitions. [2023-08-26 13:10:22,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 116 transitions, 714 flow [2023-08-26 13:10:22,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 116 transitions, 670 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-08-26 13:10:22,781 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 310 flow [2023-08-26 13:10:22,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=310, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-08-26 13:10:22,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2023-08-26 13:10:22,782 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 310 flow [2023-08-26 13:10:22,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 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 13:10:22,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:22,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:22,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:22,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-26 13:10:22,989 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:22,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:22,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1214679969, now seen corresponding path program 1 times [2023-08-26 13:10:22,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:22,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590726732] [2023-08-26 13:10:22,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:22,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:23,205 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 13:10:23,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:23,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590726732] [2023-08-26 13:10:23,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590726732] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:23,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:23,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:10:23,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401258597] [2023-08-26 13:10:23,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:23,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:10:23,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:23,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:10:23,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:10:23,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:10:23,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:10:23,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:23,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:10:23,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:23,524 INFO L124 PetriNetUnfolderBase]: 1025/1532 cut-off events. [2023-08-26 13:10:23,524 INFO L125 PetriNetUnfolderBase]: For 4701/4701 co-relation queries the response was YES. [2023-08-26 13:10:23,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6065 conditions, 1532 events. 1025/1532 cut-off events. For 4701/4701 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6296 event pairs, 314 based on Foata normal form. 6/1538 useless extension candidates. Maximal degree in co-relation 6050. Up to 862 conditions per place. [2023-08-26 13:10:23,536 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 93 selfloop transitions, 13 changer transitions 9/115 dead transitions. [2023-08-26 13:10:23,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 115 transitions, 896 flow [2023-08-26 13:10:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:10:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:10:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 692 transitions. [2023-08-26 13:10:23,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43358395989974935 [2023-08-26 13:10:23,539 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 692 transitions. [2023-08-26 13:10:23,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 692 transitions. [2023-08-26 13:10:23,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:23,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 692 transitions. [2023-08-26 13:10:23,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.85714285714286) internal successors, (692), 7 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:23,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:23,543 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:23,543 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 310 flow. Second operand 7 states and 692 transitions. [2023-08-26 13:10:23,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 115 transitions, 896 flow [2023-08-26 13:10:23,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 115 transitions, 888 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-26 13:10:23,556 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 436 flow [2023-08-26 13:10:23,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=436, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-08-26 13:10:23,557 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2023-08-26 13:10:23,557 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 436 flow [2023-08-26 13:10:23,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:10:23,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:23,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:23,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 13:10:23,558 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:23,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:23,558 INFO L85 PathProgramCache]: Analyzing trace with hash 80461315, now seen corresponding path program 3 times [2023-08-26 13:10:23,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:23,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400095857] [2023-08-26 13:10:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:23,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:23,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:23,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400095857] [2023-08-26 13:10:23,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400095857] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:23,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548507562] [2023-08-26 13:10:23,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:10:23,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:23,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:23,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:10:23,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 13:10:23,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:10:23,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:23,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:10:23,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:23,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:24,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548507562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:24,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:24,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2023-08-26 13:10:24,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547109323] [2023-08-26 13:10:24,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:24,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:10:24,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:24,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:10:24,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:10:24,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:10:24,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 436 flow. Second operand has 16 states, 16 states have (on average 90.0625) internal successors, (1441), 16 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:24,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:24,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:10:24,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:24,941 INFO L124 PetriNetUnfolderBase]: 1575/2242 cut-off events. [2023-08-26 13:10:24,941 INFO L125 PetriNetUnfolderBase]: For 11011/11011 co-relation queries the response was YES. [2023-08-26 13:10:24,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10396 conditions, 2242 events. 1575/2242 cut-off events. For 11011/11011 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9039 event pairs, 399 based on Foata normal form. 36/2278 useless extension candidates. Maximal degree in co-relation 10375. Up to 1311 conditions per place. [2023-08-26 13:10:24,961 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 122 selfloop transitions, 104 changer transitions 0/226 dead transitions. [2023-08-26 13:10:24,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 226 transitions, 2057 flow [2023-08-26 13:10:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-26 13:10:24,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-26 13:10:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1932 transitions. [2023-08-26 13:10:24,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236842105263158 [2023-08-26 13:10:24,967 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1932 transitions. [2023-08-26 13:10:24,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1932 transitions. [2023-08-26 13:10:24,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:24,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1932 transitions. [2023-08-26 13:10:24,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 96.6) internal successors, (1932), 20 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:24,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 228.0) internal successors, (4788), 21 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:24,979 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 228.0) internal successors, (4788), 21 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:24,979 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 436 flow. Second operand 20 states and 1932 transitions. [2023-08-26 13:10:24,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 226 transitions, 2057 flow [2023-08-26 13:10:25,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 226 transitions, 1964 flow, removed 39 selfloop flow, removed 2 redundant places. [2023-08-26 13:10:25,015 INFO L231 Difference]: Finished difference. Result has 94 places, 148 transitions, 1638 flow [2023-08-26 13:10:25,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1638, PETRI_PLACES=94, PETRI_TRANSITIONS=148} [2023-08-26 13:10:25,016 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2023-08-26 13:10:25,016 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 148 transitions, 1638 flow [2023-08-26 13:10:25,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 90.0625) internal successors, (1441), 16 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:25,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:25,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:25,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:25,227 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,SelfDestructingSolverStorable11 [2023-08-26 13:10:25,228 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:25,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:25,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1222942839, now seen corresponding path program 4 times [2023-08-26 13:10:25,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:25,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866711601] [2023-08-26 13:10:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:25,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:25,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:25,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866711601] [2023-08-26 13:10:25,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866711601] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:25,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885940364] [2023-08-26 13:10:25,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:10:25,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:25,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:25,424 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:10:25,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 13:10:25,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:10:25,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:25,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 13:10:25,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:25,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:25,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885940364] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:25,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:25,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2023-08-26 13:10:25,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034160134] [2023-08-26 13:10:25,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:25,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 13:10:25,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:25,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 13:10:25,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-26 13:10:25,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:10:25,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 148 transitions, 1638 flow. Second operand has 12 states, 12 states have (on average 90.91666666666667) internal successors, (1091), 12 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:25,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:25,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:10:25,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:26,500 INFO L124 PetriNetUnfolderBase]: 2378/3303 cut-off events. [2023-08-26 13:10:26,500 INFO L125 PetriNetUnfolderBase]: For 29053/29053 co-relation queries the response was YES. [2023-08-26 13:10:26,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19640 conditions, 3303 events. 2378/3303 cut-off events. For 29053/29053 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13543 event pairs, 392 based on Foata normal form. 16/3319 useless extension candidates. Maximal degree in co-relation 19607. Up to 2245 conditions per place. [2023-08-26 13:10:26,538 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 241 selfloop transitions, 126 changer transitions 3/370 dead transitions. [2023-08-26 13:10:26,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 370 transitions, 4567 flow [2023-08-26 13:10:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:10:26,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:10:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1362 transitions. [2023-08-26 13:10:26,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266917293233083 [2023-08-26 13:10:26,542 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1362 transitions. [2023-08-26 13:10:26,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1362 transitions. [2023-08-26 13:10:26,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:26,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1362 transitions. [2023-08-26 13:10:26,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 97.28571428571429) internal successors, (1362), 14 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:26,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 228.0) internal successors, (3420), 15 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:26,551 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 228.0) internal successors, (3420), 15 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:26,551 INFO L175 Difference]: Start difference. First operand has 94 places, 148 transitions, 1638 flow. Second operand 14 states and 1362 transitions. [2023-08-26 13:10:26,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 370 transitions, 4567 flow [2023-08-26 13:10:26,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 370 transitions, 3719 flow, removed 353 selfloop flow, removed 2 redundant places. [2023-08-26 13:10:26,678 INFO L231 Difference]: Finished difference. Result has 114 places, 251 transitions, 2656 flow [2023-08-26 13:10:26,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2656, PETRI_PLACES=114, PETRI_TRANSITIONS=251} [2023-08-26 13:10:26,679 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2023-08-26 13:10:26,679 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 251 transitions, 2656 flow [2023-08-26 13:10:26,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 90.91666666666667) internal successors, (1091), 12 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:26,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:26,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:26,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:26,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:26,886 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:26,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:26,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1571769229, now seen corresponding path program 1 times [2023-08-26 13:10:26,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:26,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686103686] [2023-08-26 13:10:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:26,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:27,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:27,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686103686] [2023-08-26 13:10:27,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686103686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:27,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44459353] [2023-08-26 13:10:27,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:27,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:27,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:27,057 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:10:27,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 13:10:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:27,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:10:27,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:27,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:28,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44459353] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:28,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:28,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2023-08-26 13:10:28,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840359716] [2023-08-26 13:10:28,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:28,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:10:28,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:28,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:10:28,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:10:28,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:10:29,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 251 transitions, 2656 flow. Second operand has 14 states, 14 states have (on average 90.42857142857143) internal successors, (1266), 14 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:29,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:29,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:10:29,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:32,163 INFO L124 PetriNetUnfolderBase]: 4221/5945 cut-off events. [2023-08-26 13:10:32,164 INFO L125 PetriNetUnfolderBase]: For 57396/57396 co-relation queries the response was YES. [2023-08-26 13:10:32,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36505 conditions, 5945 events. 4221/5945 cut-off events. For 57396/57396 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 28394 event pairs, 375 based on Foata normal form. 60/6005 useless extension candidates. Maximal degree in co-relation 36463. Up to 2160 conditions per place. [2023-08-26 13:10:32,246 INFO L140 encePairwiseOnDemand]: 218/228 looper letters, 372 selfloop transitions, 301 changer transitions 2/675 dead transitions. [2023-08-26 13:10:32,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 675 transitions, 8200 flow [2023-08-26 13:10:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 13:10:32,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 13:10:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2460 transitions. [2023-08-26 13:10:32,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43157894736842106 [2023-08-26 13:10:32,253 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2460 transitions. [2023-08-26 13:10:32,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2460 transitions. [2023-08-26 13:10:32,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:32,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2460 transitions. [2023-08-26 13:10:32,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 98.4) internal successors, (2460), 25 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:32,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 228.0) internal successors, (5928), 26 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:32,268 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 228.0) internal successors, (5928), 26 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:32,269 INFO L175 Difference]: Start difference. First operand has 114 places, 251 transitions, 2656 flow. Second operand 25 states and 2460 transitions. [2023-08-26 13:10:32,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 675 transitions, 8200 flow [2023-08-26 13:10:32,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 675 transitions, 7589 flow, removed 284 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:32,544 INFO L231 Difference]: Finished difference. Result has 157 places, 455 transitions, 5854 flow [2023-08-26 13:10:32,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5854, PETRI_PLACES=157, PETRI_TRANSITIONS=455} [2023-08-26 13:10:32,545 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2023-08-26 13:10:32,545 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 455 transitions, 5854 flow [2023-08-26 13:10:32,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 90.42857142857143) internal successors, (1266), 14 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:32,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:32,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:32,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:32,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:32,752 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:32,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:32,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1403318481, now seen corresponding path program 2 times [2023-08-26 13:10:32,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:32,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303358650] [2023-08-26 13:10:32,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:32,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:32,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:32,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303358650] [2023-08-26 13:10:32,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303358650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:32,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907963574] [2023-08-26 13:10:32,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:10:32,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:32,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:32,929 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:10:32,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 13:10:33,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:10:33,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:33,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 13:10:33,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:33,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:33,259 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 13:10:33,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907963574] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:33,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 13:10:33,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 9 [2023-08-26 13:10:33,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840491628] [2023-08-26 13:10:33,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:33,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:10:33,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:33,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:10:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:10:33,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-26 13:10:33,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 455 transitions, 5854 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 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 13:10:33,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:33,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-26 13:10:33,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:34,551 INFO L124 PetriNetUnfolderBase]: 4896/6865 cut-off events. [2023-08-26 13:10:34,551 INFO L125 PetriNetUnfolderBase]: For 91432/91548 co-relation queries the response was YES. [2023-08-26 13:10:34,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47813 conditions, 6865 events. 4896/6865 cut-off events. For 91432/91548 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 33338 event pairs, 373 based on Foata normal form. 90/6931 useless extension candidates. Maximal degree in co-relation 47751. Up to 2537 conditions per place. [2023-08-26 13:10:34,637 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 509 selfloop transitions, 147 changer transitions 1/669 dead transitions. [2023-08-26 13:10:34,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 669 transitions, 9435 flow [2023-08-26 13:10:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 13:10:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 13:10:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 837 transitions. [2023-08-26 13:10:34,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588815789473684 [2023-08-26 13:10:34,640 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 837 transitions. [2023-08-26 13:10:34,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 837 transitions. [2023-08-26 13:10:34,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:34,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 837 transitions. [2023-08-26 13:10:34,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 104.625) internal successors, (837), 8 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:34,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:34,645 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:34,645 INFO L175 Difference]: Start difference. First operand has 157 places, 455 transitions, 5854 flow. Second operand 8 states and 837 transitions. [2023-08-26 13:10:34,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 669 transitions, 9435 flow [2023-08-26 13:10:35,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 669 transitions, 9053 flow, removed 191 selfloop flow, removed 0 redundant places. [2023-08-26 13:10:35,200 INFO L231 Difference]: Finished difference. Result has 169 places, 522 transitions, 7053 flow [2023-08-26 13:10:35,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=5514, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7053, PETRI_PLACES=169, PETRI_TRANSITIONS=522} [2023-08-26 13:10:35,201 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2023-08-26 13:10:35,201 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 522 transitions, 7053 flow [2023-08-26 13:10:35,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 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 13:10:35,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:35,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:35,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:35,402 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,SelfDestructingSolverStorable14 [2023-08-26 13:10:35,402 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:35,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:35,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1033915617, now seen corresponding path program 2 times [2023-08-26 13:10:35,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:35,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636825395] [2023-08-26 13:10:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:35,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:35,573 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 13:10:35,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:35,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636825395] [2023-08-26 13:10:35,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636825395] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:35,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:35,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:10:35,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349831095] [2023-08-26 13:10:35,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:35,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:10:35,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:35,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:10:35,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:10:35,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:10:35,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 522 transitions, 7053 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:10:35,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:35,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:10:35,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:36,920 INFO L124 PetriNetUnfolderBase]: 5017/7076 cut-off events. [2023-08-26 13:10:36,920 INFO L125 PetriNetUnfolderBase]: For 105106/105106 co-relation queries the response was YES. [2023-08-26 13:10:36,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50644 conditions, 7076 events. 5017/7076 cut-off events. For 105106/105106 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 34680 event pairs, 757 based on Foata normal form. 30/7106 useless extension candidates. Maximal degree in co-relation 50576. Up to 4489 conditions per place. [2023-08-26 13:10:36,992 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 511 selfloop transitions, 99 changer transitions 12/622 dead transitions. [2023-08-26 13:10:36,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 622 transitions, 9459 flow [2023-08-26 13:10:36,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:10:36,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:10:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 692 transitions. [2023-08-26 13:10:36,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43358395989974935 [2023-08-26 13:10:36,994 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 692 transitions. [2023-08-26 13:10:36,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 692 transitions. [2023-08-26 13:10:36,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:36,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 692 transitions. [2023-08-26 13:10:36,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.85714285714286) internal successors, (692), 7 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:36,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:36,999 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:37,000 INFO L175 Difference]: Start difference. First operand has 169 places, 522 transitions, 7053 flow. Second operand 7 states and 692 transitions. [2023-08-26 13:10:37,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 622 transitions, 9459 flow [2023-08-26 13:10:37,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 622 transitions, 9235 flow, removed 94 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:37,611 INFO L231 Difference]: Finished difference. Result has 178 places, 528 transitions, 7205 flow [2023-08-26 13:10:37,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=6833, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7205, PETRI_PLACES=178, PETRI_TRANSITIONS=528} [2023-08-26 13:10:37,612 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2023-08-26 13:10:37,612 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 528 transitions, 7205 flow [2023-08-26 13:10:37,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:10:37,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:37,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:37,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 13:10:37,613 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:37,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:37,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1797585343, now seen corresponding path program 5 times [2023-08-26 13:10:37,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:37,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306239876] [2023-08-26 13:10:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:37,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:37,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:37,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306239876] [2023-08-26 13:10:37,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306239876] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:37,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79484719] [2023-08-26 13:10:37,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:10:37,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:37,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:37,776 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:10:37,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 13:10:37,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:10:37,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:37,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 13:10:37,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:37,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:38,121 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 13:10:38,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79484719] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:38,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 13:10:38,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 12 [2023-08-26 13:10:38,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061086217] [2023-08-26 13:10:38,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:38,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:10:38,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:38,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:10:38,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-26 13:10:38,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:10:38,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 528 transitions, 7205 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:10:38,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:38,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:10:38,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:39,528 INFO L124 PetriNetUnfolderBase]: 5188/7343 cut-off events. [2023-08-26 13:10:39,528 INFO L125 PetriNetUnfolderBase]: For 111764/111764 co-relation queries the response was YES. [2023-08-26 13:10:39,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53090 conditions, 7343 events. 5188/7343 cut-off events. For 111764/111764 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 36326 event pairs, 367 based on Foata normal form. 12/7355 useless extension candidates. Maximal degree in co-relation 53018. Up to 2798 conditions per place. [2023-08-26 13:10:39,599 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 342 selfloop transitions, 361 changer transitions 2/705 dead transitions. [2023-08-26 13:10:39,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 705 transitions, 11143 flow [2023-08-26 13:10:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:10:39,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:10:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 701 transitions. [2023-08-26 13:10:39,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392230576441103 [2023-08-26 13:10:39,601 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 701 transitions. [2023-08-26 13:10:39,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 701 transitions. [2023-08-26 13:10:39,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:39,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 701 transitions. [2023-08-26 13:10:39,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 100.14285714285714) internal successors, (701), 7 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:39,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:39,605 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:39,605 INFO L175 Difference]: Start difference. First operand has 178 places, 528 transitions, 7205 flow. Second operand 7 states and 701 transitions. [2023-08-26 13:10:39,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 705 transitions, 11143 flow [2023-08-26 13:10:40,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 705 transitions, 10887 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-26 13:10:40,272 INFO L231 Difference]: Finished difference. Result has 185 places, 580 transitions, 9303 flow [2023-08-26 13:10:40,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=7038, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9303, PETRI_PLACES=185, PETRI_TRANSITIONS=580} [2023-08-26 13:10:40,273 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2023-08-26 13:10:40,273 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 580 transitions, 9303 flow [2023-08-26 13:10:40,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:10:40,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:40,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:40,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:40,474 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,SelfDestructingSolverStorable16 [2023-08-26 13:10:40,474 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:40,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:40,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1519337089, now seen corresponding path program 6 times [2023-08-26 13:10:40,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:40,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860068534] [2023-08-26 13:10:40,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:40,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:40,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:40,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860068534] [2023-08-26 13:10:40,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860068534] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:40,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295028113] [2023-08-26 13:10:40,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:10:40,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:40,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:40,659 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:10:40,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 13:10:40,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 13:10:40,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:40,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:10:40,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:40,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:41,238 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 13:10:41,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295028113] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:41,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 13:10:41,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 15 [2023-08-26 13:10:41,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193968367] [2023-08-26 13:10:41,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:41,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:10:41,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:41,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:10:41,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-26 13:10:41,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:10:41,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 580 transitions, 9303 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:10:41,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:41,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:10:41,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:42,887 INFO L124 PetriNetUnfolderBase]: 5610/8043 cut-off events. [2023-08-26 13:10:42,887 INFO L125 PetriNetUnfolderBase]: For 155440/155440 co-relation queries the response was YES. [2023-08-26 13:10:42,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64395 conditions, 8043 events. 5610/8043 cut-off events. For 155440/155440 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 41574 event pairs, 714 based on Foata normal form. 22/8065 useless extension candidates. Maximal degree in co-relation 64319. Up to 2738 conditions per place. [2023-08-26 13:10:43,022 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 456 selfloop transitions, 276 changer transitions 1/733 dead transitions. [2023-08-26 13:10:43,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 733 transitions, 12894 flow [2023-08-26 13:10:43,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 13:10:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 13:10:43,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 807 transitions. [2023-08-26 13:10:43,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44243421052631576 [2023-08-26 13:10:43,024 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 807 transitions. [2023-08-26 13:10:43,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 807 transitions. [2023-08-26 13:10:43,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:43,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 807 transitions. [2023-08-26 13:10:43,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 100.875) internal successors, (807), 8 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:43,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:43,028 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:43,028 INFO L175 Difference]: Start difference. First operand has 185 places, 580 transitions, 9303 flow. Second operand 8 states and 807 transitions. [2023-08-26 13:10:43,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 733 transitions, 12894 flow [2023-08-26 13:10:43,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 733 transitions, 12604 flow, removed 116 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:43,875 INFO L231 Difference]: Finished difference. Result has 196 places, 628 transitions, 10981 flow [2023-08-26 13:10:43,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=9072, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10981, PETRI_PLACES=196, PETRI_TRANSITIONS=628} [2023-08-26 13:10:43,875 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2023-08-26 13:10:43,875 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 628 transitions, 10981 flow [2023-08-26 13:10:43,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:10:43,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:43,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:43,880 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 13:10:44,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:44,076 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:44,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:44,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1584022425, now seen corresponding path program 7 times [2023-08-26 13:10:44,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:44,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709927951] [2023-08-26 13:10:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:44,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:44,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:44,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709927951] [2023-08-26 13:10:44,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709927951] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:44,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52776179] [2023-08-26 13:10:44,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:10:44,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:44,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:44,297 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:10:44,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 13:10:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:44,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:10:44,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:44,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:44,699 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 13:10:44,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52776179] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:44,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 13:10:44,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2023-08-26 13:10:44,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105198424] [2023-08-26 13:10:44,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:44,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:10:44,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:44,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:10:44,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-26 13:10:44,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-26 13:10:44,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 628 transitions, 10981 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 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 13:10:44,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:44,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-26 13:10:44,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:46,237 INFO L124 PetriNetUnfolderBase]: 5596/8040 cut-off events. [2023-08-26 13:10:46,238 INFO L125 PetriNetUnfolderBase]: For 172634/172662 co-relation queries the response was YES. [2023-08-26 13:10:46,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66302 conditions, 8040 events. 5596/8040 cut-off events. For 172634/172662 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 41768 event pairs, 936 based on Foata normal form. 33/8065 useless extension candidates. Maximal degree in co-relation 66221. Up to 3788 conditions per place. [2023-08-26 13:10:46,312 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 506 selfloop transitions, 182 changer transitions 1/701 dead transitions. [2023-08-26 13:10:46,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 701 transitions, 13238 flow [2023-08-26 13:10:46,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:10:46,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:10:46,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 620 transitions. [2023-08-26 13:10:46,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45321637426900585 [2023-08-26 13:10:46,314 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 620 transitions. [2023-08-26 13:10:46,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 620 transitions. [2023-08-26 13:10:46,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:46,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 620 transitions. [2023-08-26 13:10:46,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 103.33333333333333) internal successors, (620), 6 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:46,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:46,317 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:46,317 INFO L175 Difference]: Start difference. First operand has 196 places, 628 transitions, 10981 flow. Second operand 6 states and 620 transitions. [2023-08-26 13:10:46,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 701 transitions, 13238 flow [2023-08-26 13:10:47,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 701 transitions, 13091 flow, removed 32 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:47,336 INFO L231 Difference]: Finished difference. Result has 203 places, 638 transitions, 11623 flow [2023-08-26 13:10:47,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=10855, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11623, PETRI_PLACES=203, PETRI_TRANSITIONS=638} [2023-08-26 13:10:47,337 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2023-08-26 13:10:47,337 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 638 transitions, 11623 flow [2023-08-26 13:10:47,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 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 13:10:47,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:47,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:47,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:47,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:47,539 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:47,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:47,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1163269587, now seen corresponding path program 8 times [2023-08-26 13:10:47,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:47,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699442681] [2023-08-26 13:10:47,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:47,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:47,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:47,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699442681] [2023-08-26 13:10:47,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699442681] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:47,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891346985] [2023-08-26 13:10:47,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:10:47,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:47,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:47,705 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:10:47,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 13:10:47,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:10:47,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:47,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:10:47,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:47,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:48,062 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 13:10:48,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891346985] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:48,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 13:10:48,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2023-08-26 13:10:48,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279812140] [2023-08-26 13:10:48,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:48,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:10:48,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:48,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:10:48,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-26 13:10:48,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-26 13:10:48,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 638 transitions, 11623 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 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 13:10:48,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:48,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-26 13:10:48,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:49,723 INFO L124 PetriNetUnfolderBase]: 5578/8022 cut-off events. [2023-08-26 13:10:49,723 INFO L125 PetriNetUnfolderBase]: For 173889/173917 co-relation queries the response was YES. [2023-08-26 13:10:49,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67255 conditions, 8022 events. 5578/8022 cut-off events. For 173889/173917 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 41739 event pairs, 898 based on Foata normal form. 33/8047 useless extension candidates. Maximal degree in co-relation 67170. Up to 4258 conditions per place. [2023-08-26 13:10:49,905 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 589 selfloop transitions, 102 changer transitions 1/704 dead transitions. [2023-08-26 13:10:49,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 704 transitions, 13788 flow [2023-08-26 13:10:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:10:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:10:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 620 transitions. [2023-08-26 13:10:49,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45321637426900585 [2023-08-26 13:10:49,907 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 620 transitions. [2023-08-26 13:10:49,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 620 transitions. [2023-08-26 13:10:49,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:49,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 620 transitions. [2023-08-26 13:10:49,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 103.33333333333333) internal successors, (620), 6 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:49,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:49,910 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:49,910 INFO L175 Difference]: Start difference. First operand has 203 places, 638 transitions, 11623 flow. Second operand 6 states and 620 transitions. [2023-08-26 13:10:49,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 704 transitions, 13788 flow [2023-08-26 13:10:50,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 704 transitions, 13669 flow, removed 41 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:50,881 INFO L231 Difference]: Finished difference. Result has 209 places, 643 transitions, 11891 flow [2023-08-26 13:10:50,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=11510, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11891, PETRI_PLACES=209, PETRI_TRANSITIONS=643} [2023-08-26 13:10:50,881 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2023-08-26 13:10:50,881 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 643 transitions, 11891 flow [2023-08-26 13:10:50,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 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 13:10:50,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:50,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:50,886 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 13:10:51,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:51,083 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:51,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:51,083 INFO L85 PathProgramCache]: Analyzing trace with hash -547343721, now seen corresponding path program 9 times [2023-08-26 13:10:51,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:51,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270306108] [2023-08-26 13:10:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:51,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:51,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:51,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270306108] [2023-08-26 13:10:51,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270306108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:51,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014078768] [2023-08-26 13:10:51,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:10:51,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:51,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:51,273 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:10:51,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 13:10:51,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:10:51,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:51,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:10:51,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:51,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:51,593 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 13:10:51,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014078768] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:51,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 13:10:51,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2023-08-26 13:10:51,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418971013] [2023-08-26 13:10:51,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:51,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:10:51,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:51,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:10:51,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-26 13:10:51,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-26 13:10:51,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 643 transitions, 11891 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 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 13:10:51,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:51,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-26 13:10:51,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:53,200 INFO L124 PetriNetUnfolderBase]: 5599/8073 cut-off events. [2023-08-26 13:10:53,200 INFO L125 PetriNetUnfolderBase]: For 174627/174655 co-relation queries the response was YES. [2023-08-26 13:10:53,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68310 conditions, 8073 events. 5599/8073 cut-off events. For 174627/174655 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 42319 event pairs, 906 based on Foata normal form. 59/8124 useless extension candidates. Maximal degree in co-relation 68223. Up to 4223 conditions per place. [2023-08-26 13:10:53,286 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 587 selfloop transitions, 112 changer transitions 1/712 dead transitions. [2023-08-26 13:10:53,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 712 transitions, 14073 flow [2023-08-26 13:10:53,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:10:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:10:53,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 622 transitions. [2023-08-26 13:10:53,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546783625730994 [2023-08-26 13:10:53,288 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 622 transitions. [2023-08-26 13:10:53,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 622 transitions. [2023-08-26 13:10:53,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:53,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 622 transitions. [2023-08-26 13:10:53,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 103.66666666666667) internal successors, (622), 6 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:53,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:53,292 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:53,292 INFO L175 Difference]: Start difference. First operand has 209 places, 643 transitions, 11891 flow. Second operand 6 states and 622 transitions. [2023-08-26 13:10:53,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 712 transitions, 14073 flow [2023-08-26 13:10:54,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 712 transitions, 13929 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-26 13:10:54,377 INFO L231 Difference]: Finished difference. Result has 213 places, 649 transitions, 12149 flow [2023-08-26 13:10:54,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=11747, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12149, PETRI_PLACES=213, PETRI_TRANSITIONS=649} [2023-08-26 13:10:54,378 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2023-08-26 13:10:54,378 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 649 transitions, 12149 flow [2023-08-26 13:10:54,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 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 13:10:54,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:54,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:54,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:54,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-26 13:10:54,578 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:54,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:54,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1690937487, now seen corresponding path program 10 times [2023-08-26 13:10:54,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:54,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541057023] [2023-08-26 13:10:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:54,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:54,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:54,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541057023] [2023-08-26 13:10:54,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541057023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:54,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517336379] [2023-08-26 13:10:54,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:10:54,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:54,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:54,705 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:10:54,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 13:10:54,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:10:54,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:54,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 13:10:54,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:54,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:54,964 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 13:10:54,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517336379] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:54,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 13:10:54,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2023-08-26 13:10:54,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734950471] [2023-08-26 13:10:54,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:54,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:10:54,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:54,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:10:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-26 13:10:54,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-26 13:10:54,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 649 transitions, 12149 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 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 13:10:54,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:54,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-26 13:10:54,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:56,586 INFO L124 PetriNetUnfolderBase]: 5561/7995 cut-off events. [2023-08-26 13:10:56,587 INFO L125 PetriNetUnfolderBase]: For 176105/176133 co-relation queries the response was YES. [2023-08-26 13:10:56,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67875 conditions, 7995 events. 5561/7995 cut-off events. For 176105/176133 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 41646 event pairs, 926 based on Foata normal form. 45/8032 useless extension candidates. Maximal degree in co-relation 67787. Up to 3760 conditions per place. [2023-08-26 13:10:56,664 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 511 selfloop transitions, 190 changer transitions 1/714 dead transitions. [2023-08-26 13:10:56,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 714 transitions, 14143 flow [2023-08-26 13:10:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:10:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:10:56,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 622 transitions. [2023-08-26 13:10:56,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546783625730994 [2023-08-26 13:10:56,665 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 622 transitions. [2023-08-26 13:10:56,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 622 transitions. [2023-08-26 13:10:56,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:56,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 622 transitions. [2023-08-26 13:10:56,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 103.66666666666667) internal successors, (622), 6 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:56,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:56,670 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:56,670 INFO L175 Difference]: Start difference. First operand has 213 places, 649 transitions, 12149 flow. Second operand 6 states and 622 transitions. [2023-08-26 13:10:56,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 714 transitions, 14143 flow [2023-08-26 13:10:57,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 714 transitions, 14011 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-26 13:10:57,773 INFO L231 Difference]: Finished difference. Result has 216 places, 649 transitions, 12397 flow [2023-08-26 13:10:57,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=12017, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12397, PETRI_PLACES=216, PETRI_TRANSITIONS=649} [2023-08-26 13:10:57,774 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2023-08-26 13:10:57,774 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 649 transitions, 12397 flow [2023-08-26 13:10:57,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 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 13:10:57,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:57,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:57,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:57,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-26 13:10:57,975 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:10:57,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:57,975 INFO L85 PathProgramCache]: Analyzing trace with hash -559824491, now seen corresponding path program 3 times [2023-08-26 13:10:57,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:57,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605758287] [2023-08-26 13:10:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:57,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:58,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:58,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605758287] [2023-08-26 13:10:58,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605758287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:58,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723568469] [2023-08-26 13:10:58,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:10:58,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:58,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:58,114 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:10:58,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 13:10:58,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:10:58,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:58,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:10:58,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:58,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:58,712 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 13:10:58,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723568469] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:58,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 13:10:58,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2023-08-26 13:10:58,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562302109] [2023-08-26 13:10:58,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:58,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:10:58,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:58,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:10:58,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:10:58,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-26 13:10:58,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 649 transitions, 12397 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 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 13:10:58,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:58,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-26 13:10:58,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:00,633 INFO L124 PetriNetUnfolderBase]: 6026/8661 cut-off events. [2023-08-26 13:11:00,634 INFO L125 PetriNetUnfolderBase]: For 187154/187376 co-relation queries the response was YES. [2023-08-26 13:11:00,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73333 conditions, 8661 events. 6026/8661 cut-off events. For 187154/187376 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 45961 event pairs, 684 based on Foata normal form. 167/8795 useless extension candidates. Maximal degree in co-relation 73245. Up to 3110 conditions per place. [2023-08-26 13:11:00,718 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 449 selfloop transitions, 329 changer transitions 0/795 dead transitions. [2023-08-26 13:11:00,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 795 transitions, 15755 flow [2023-08-26 13:11:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 13:11:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 13:11:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 831 transitions. [2023-08-26 13:11:00,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555921052631579 [2023-08-26 13:11:00,720 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 831 transitions. [2023-08-26 13:11:00,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 831 transitions. [2023-08-26 13:11:00,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:00,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 831 transitions. [2023-08-26 13:11:00,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 103.875) internal successors, (831), 8 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:00,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:00,723 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:00,724 INFO L175 Difference]: Start difference. First operand has 216 places, 649 transitions, 12397 flow. Second operand 8 states and 831 transitions. [2023-08-26 13:11:00,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 795 transitions, 15755 flow [2023-08-26 13:11:01,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 795 transitions, 15338 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-08-26 13:11:01,816 INFO L231 Difference]: Finished difference. Result has 225 places, 691 transitions, 13863 flow [2023-08-26 13:11:01,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=11998, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13863, PETRI_PLACES=225, PETRI_TRANSITIONS=691} [2023-08-26 13:11:01,817 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2023-08-26 13:11:01,817 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 691 transitions, 13863 flow [2023-08-26 13:11:01,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 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 13:11:01,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:01,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:01,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-26 13:11:02,022 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,SelfDestructingSolverStorable22 [2023-08-26 13:11:02,022 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:02,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:02,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1099860491, now seen corresponding path program 4 times [2023-08-26 13:11:02,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:02,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454126688] [2023-08-26 13:11:02,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:02,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:02,139 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 13:11:02,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:02,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454126688] [2023-08-26 13:11:02,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454126688] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:02,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:02,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:11:02,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125947458] [2023-08-26 13:11:02,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:02,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:11:02,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:02,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:11:02,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:11:02,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:11:02,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 691 transitions, 13863 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:11:02,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:02,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:11:02,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:04,236 INFO L124 PetriNetUnfolderBase]: 6439/9340 cut-off events. [2023-08-26 13:11:04,236 INFO L125 PetriNetUnfolderBase]: For 220283/220283 co-relation queries the response was YES. [2023-08-26 13:11:04,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80123 conditions, 9340 events. 6439/9340 cut-off events. For 220283/220283 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 50714 event pairs, 1097 based on Foata normal form. 52/9392 useless extension candidates. Maximal degree in co-relation 80030. Up to 5045 conditions per place. [2023-08-26 13:11:04,338 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 720 selfloop transitions, 127 changer transitions 14/861 dead transitions. [2023-08-26 13:11:04,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 861 transitions, 17945 flow [2023-08-26 13:11:04,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:11:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:11:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 693 transitions. [2023-08-26 13:11:04,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342105263157895 [2023-08-26 13:11:04,340 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 693 transitions. [2023-08-26 13:11:04,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 693 transitions. [2023-08-26 13:11:04,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:04,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 693 transitions. [2023-08-26 13:11:04,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:04,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:04,342 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:04,343 INFO L175 Difference]: Start difference. First operand has 225 places, 691 transitions, 13863 flow. Second operand 7 states and 693 transitions. [2023-08-26 13:11:04,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 861 transitions, 17945 flow [2023-08-26 13:11:05,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 861 transitions, 17551 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-26 13:11:05,870 INFO L231 Difference]: Finished difference. Result has 233 places, 719 transitions, 14549 flow [2023-08-26 13:11:05,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=13508, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14549, PETRI_PLACES=233, PETRI_TRANSITIONS=719} [2023-08-26 13:11:05,871 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2023-08-26 13:11:05,871 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 719 transitions, 14549 flow [2023-08-26 13:11:05,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:11:05,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:05,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:05,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 13:11:05,871 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:05,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:05,872 INFO L85 PathProgramCache]: Analyzing trace with hash -275215523, now seen corresponding path program 5 times [2023-08-26 13:11:05,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:05,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545140323] [2023-08-26 13:11:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:05,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:06,018 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 13:11:06,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:06,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545140323] [2023-08-26 13:11:06,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545140323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:06,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:06,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:11:06,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83229464] [2023-08-26 13:11:06,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:06,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:11:06,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:06,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:11:06,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:11:06,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:11:06,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 719 transitions, 14549 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:11:06,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:06,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:11:06,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:08,276 INFO L124 PetriNetUnfolderBase]: 6489/9460 cut-off events. [2023-08-26 13:11:08,276 INFO L125 PetriNetUnfolderBase]: For 220986/220986 co-relation queries the response was YES. [2023-08-26 13:11:08,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82288 conditions, 9460 events. 6489/9460 cut-off events. For 220986/220986 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 51828 event pairs, 772 based on Foata normal form. 36/9496 useless extension candidates. Maximal degree in co-relation 82191. Up to 3666 conditions per place. [2023-08-26 13:11:08,371 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 475 selfloop transitions, 401 changer transitions 10/886 dead transitions. [2023-08-26 13:11:08,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 886 transitions, 18797 flow [2023-08-26 13:11:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:11:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:11:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 685 transitions. [2023-08-26 13:11:08,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4291979949874687 [2023-08-26 13:11:08,373 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 685 transitions. [2023-08-26 13:11:08,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 685 transitions. [2023-08-26 13:11:08,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:08,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 685 transitions. [2023-08-26 13:11:08,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.85714285714286) internal successors, (685), 7 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:08,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:08,375 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:08,375 INFO L175 Difference]: Start difference. First operand has 233 places, 719 transitions, 14549 flow. Second operand 7 states and 685 transitions. [2023-08-26 13:11:08,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 886 transitions, 18797 flow [2023-08-26 13:11:10,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 886 transitions, 18510 flow, removed 40 selfloop flow, removed 3 redundant places. [2023-08-26 13:11:10,041 INFO L231 Difference]: Finished difference. Result has 239 places, 736 transitions, 15725 flow [2023-08-26 13:11:10,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=14359, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15725, PETRI_PLACES=239, PETRI_TRANSITIONS=736} [2023-08-26 13:11:10,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2023-08-26 13:11:10,042 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 736 transitions, 15725 flow [2023-08-26 13:11:10,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:11:10,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:10,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:10,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 13:11:10,043 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:10,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:10,043 INFO L85 PathProgramCache]: Analyzing trace with hash -68765191, now seen corresponding path program 6 times [2023-08-26 13:11:10,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:10,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135026276] [2023-08-26 13:11:10,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:10,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:10,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:10,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135026276] [2023-08-26 13:11:10,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135026276] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:10,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369071220] [2023-08-26 13:11:10,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:11:10,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:10,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:10,177 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:11:10,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 13:11:10,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 13:11:10,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:11:10,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-26 13:11:10,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:10,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:11,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369071220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:11,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:11,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-08-26 13:11:11,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856313828] [2023-08-26 13:11:11,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:11,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 13:11:11,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:11,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 13:11:11,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2023-08-26 13:11:11,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 228 [2023-08-26 13:11:11,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 736 transitions, 15725 flow. Second operand has 19 states, 19 states have (on average 87.52631578947368) internal successors, (1663), 19 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:11,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:11,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 228 [2023-08-26 13:11:11,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:16,127 INFO L124 PetriNetUnfolderBase]: 9038/13227 cut-off events. [2023-08-26 13:11:16,127 INFO L125 PetriNetUnfolderBase]: For 366104/366104 co-relation queries the response was YES. [2023-08-26 13:11:16,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120280 conditions, 13227 events. 9038/13227 cut-off events. For 366104/366104 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 77811 event pairs, 800 based on Foata normal form. 48/13275 useless extension candidates. Maximal degree in co-relation 120180. Up to 4759 conditions per place. [2023-08-26 13:11:16,399 INFO L140 encePairwiseOnDemand]: 218/228 looper letters, 759 selfloop transitions, 590 changer transitions 1/1350 dead transitions. [2023-08-26 13:11:16,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1350 transitions, 29441 flow [2023-08-26 13:11:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 13:11:16,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 13:11:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2384 transitions. [2023-08-26 13:11:16,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182456140350877 [2023-08-26 13:11:16,403 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2384 transitions. [2023-08-26 13:11:16,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2384 transitions. [2023-08-26 13:11:16,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:16,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2384 transitions. [2023-08-26 13:11:16,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 95.36) internal successors, (2384), 25 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:16,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 228.0) internal successors, (5928), 26 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:16,411 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 228.0) internal successors, (5928), 26 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:16,412 INFO L175 Difference]: Start difference. First operand has 239 places, 736 transitions, 15725 flow. Second operand 25 states and 2384 transitions. [2023-08-26 13:11:16,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 1350 transitions, 29441 flow [2023-08-26 13:11:18,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1350 transitions, 28276 flow, removed 26 selfloop flow, removed 3 redundant places. [2023-08-26 13:11:18,969 INFO L231 Difference]: Finished difference. Result has 274 places, 941 transitions, 21792 flow [2023-08-26 13:11:18,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=14991, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=21792, PETRI_PLACES=274, PETRI_TRANSITIONS=941} [2023-08-26 13:11:18,970 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2023-08-26 13:11:18,970 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 941 transitions, 21792 flow [2023-08-26 13:11:18,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 87.52631578947368) internal successors, (1663), 19 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:18,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:18,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-26 13:11:19,177 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,SelfDestructingSolverStorable25 [2023-08-26 13:11:19,177 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:19,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:19,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2106802643, now seen corresponding path program 3 times [2023-08-26 13:11:19,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:19,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79775038] [2023-08-26 13:11:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:19,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:19,322 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 13:11:19,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:19,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79775038] [2023-08-26 13:11:19,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79775038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:19,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:19,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:11:19,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364520239] [2023-08-26 13:11:19,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:19,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:11:19,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:19,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:11:19,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:11:19,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:11:19,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 941 transitions, 21792 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:11:19,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:19,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:11:19,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:22,557 INFO L124 PetriNetUnfolderBase]: 9037/13232 cut-off events. [2023-08-26 13:11:22,558 INFO L125 PetriNetUnfolderBase]: For 394600/394600 co-relation queries the response was YES. [2023-08-26 13:11:22,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127255 conditions, 13232 events. 9037/13232 cut-off events. For 394600/394600 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 77454 event pairs, 1842 based on Foata normal form. 6/13238 useless extension candidates. Maximal degree in co-relation 127141. Up to 8030 conditions per place. [2023-08-26 13:11:22,761 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 878 selfloop transitions, 166 changer transitions 7/1051 dead transitions. [2023-08-26 13:11:22,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 1051 transitions, 25274 flow [2023-08-26 13:11:22,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:11:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:11:22,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 690 transitions. [2023-08-26 13:11:22,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4323308270676692 [2023-08-26 13:11:22,762 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 690 transitions. [2023-08-26 13:11:22,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 690 transitions. [2023-08-26 13:11:22,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:22,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 690 transitions. [2023-08-26 13:11:22,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.57142857142857) internal successors, (690), 7 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:22,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:22,765 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:22,765 INFO L175 Difference]: Start difference. First operand has 274 places, 941 transitions, 21792 flow. Second operand 7 states and 690 transitions. [2023-08-26 13:11:22,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 1051 transitions, 25274 flow [2023-08-26 13:11:26,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1051 transitions, 24777 flow, removed 144 selfloop flow, removed 6 redundant places. [2023-08-26 13:11:26,799 INFO L231 Difference]: Finished difference. Result has 276 places, 944 transitions, 21782 flow [2023-08-26 13:11:26,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=21307, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=775, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=21782, PETRI_PLACES=276, PETRI_TRANSITIONS=944} [2023-08-26 13:11:26,800 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2023-08-26 13:11:26,801 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 944 transitions, 21782 flow [2023-08-26 13:11:26,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:11:26,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:26,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:26,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 13:11:26,801 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:26,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 843218861, now seen corresponding path program 4 times [2023-08-26 13:11:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:26,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103156076] [2023-08-26 13:11:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:26,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:26,938 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 13:11:26,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:26,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103156076] [2023-08-26 13:11:26,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103156076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:26,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:26,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:11:26,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173441375] [2023-08-26 13:11:26,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:26,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:11:26,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:11:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:11:26,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:11:26,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 944 transitions, 21782 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:11:26,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:26,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:11:26,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:30,709 INFO L124 PetriNetUnfolderBase]: 9047/13269 cut-off events. [2023-08-26 13:11:30,710 INFO L125 PetriNetUnfolderBase]: For 386466/386466 co-relation queries the response was YES. [2023-08-26 13:11:30,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125035 conditions, 13269 events. 9047/13269 cut-off events. For 386466/386466 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 77923 event pairs, 1975 based on Foata normal form. 18/13287 useless extension candidates. Maximal degree in co-relation 124922. Up to 8030 conditions per place. [2023-08-26 13:11:30,898 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 911 selfloop transitions, 109 changer transitions 18/1038 dead transitions. [2023-08-26 13:11:30,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1038 transitions, 25000 flow [2023-08-26 13:11:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:11:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:11:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 695 transitions. [2023-08-26 13:11:30,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43546365914786966 [2023-08-26 13:11:30,899 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 695 transitions. [2023-08-26 13:11:30,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 695 transitions. [2023-08-26 13:11:30,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:30,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 695 transitions. [2023-08-26 13:11:30,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.28571428571429) internal successors, (695), 7 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:30,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:30,902 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:30,902 INFO L175 Difference]: Start difference. First operand has 276 places, 944 transitions, 21782 flow. Second operand 7 states and 695 transitions. [2023-08-26 13:11:30,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1038 transitions, 25000 flow [2023-08-26 13:11:35,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1038 transitions, 24646 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-08-26 13:11:35,201 INFO L231 Difference]: Finished difference. Result has 279 places, 943 transitions, 21645 flow [2023-08-26 13:11:35,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=21440, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=21645, PETRI_PLACES=279, PETRI_TRANSITIONS=943} [2023-08-26 13:11:35,203 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2023-08-26 13:11:35,203 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 943 transitions, 21645 flow [2023-08-26 13:11:35,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:11:35,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:35,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:35,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 13:11:35,203 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:35,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:35,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1010069217, now seen corresponding path program 7 times [2023-08-26 13:11:35,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:35,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466157288] [2023-08-26 13:11:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:35,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:35,340 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 13:11:35,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:35,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466157288] [2023-08-26 13:11:35,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466157288] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:35,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:35,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:11:35,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911734664] [2023-08-26 13:11:35,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:35,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:11:35,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:35,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:11:35,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:11:35,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:11:35,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 943 transitions, 21645 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:11:35,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:35,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:11:35,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:39,642 INFO L124 PetriNetUnfolderBase]: 9124/13443 cut-off events. [2023-08-26 13:11:39,642 INFO L125 PetriNetUnfolderBase]: For 379085/379085 co-relation queries the response was YES. [2023-08-26 13:11:39,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125468 conditions, 13443 events. 9124/13443 cut-off events. For 379085/379085 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 79922 event pairs, 2393 based on Foata normal form. 48/13491 useless extension candidates. Maximal degree in co-relation 125353. Up to 12310 conditions per place. [2023-08-26 13:11:39,814 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 878 selfloop transitions, 139 changer transitions 9/1026 dead transitions. [2023-08-26 13:11:39,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 1026 transitions, 24948 flow [2023-08-26 13:11:39,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:11:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:11:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 679 transitions. [2023-08-26 13:11:39,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42543859649122806 [2023-08-26 13:11:39,816 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 679 transitions. [2023-08-26 13:11:39,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 679 transitions. [2023-08-26 13:11:39,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:39,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 679 transitions. [2023-08-26 13:11:39,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:39,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:39,819 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:39,819 INFO L175 Difference]: Start difference. First operand has 279 places, 943 transitions, 21645 flow. Second operand 7 states and 679 transitions. [2023-08-26 13:11:39,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 1026 transitions, 24948 flow [2023-08-26 13:11:43,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1026 transitions, 24692 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-08-26 13:11:43,348 INFO L231 Difference]: Finished difference. Result has 279 places, 955 transitions, 22039 flow [2023-08-26 13:11:43,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=21419, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22039, PETRI_PLACES=279, PETRI_TRANSITIONS=955} [2023-08-26 13:11:43,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2023-08-26 13:11:43,349 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 955 transitions, 22039 flow [2023-08-26 13:11:43,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:11:43,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:43,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:43,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 13:11:43,349 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:43,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:43,350 INFO L85 PathProgramCache]: Analyzing trace with hash -33862985, now seen corresponding path program 8 times [2023-08-26 13:11:43,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:43,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912226157] [2023-08-26 13:11:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:43,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:43,462 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 13:11:43,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:43,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912226157] [2023-08-26 13:11:43,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912226157] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:43,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:43,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:11:43,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969891962] [2023-08-26 13:11:43,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:43,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:11:43,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:43,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:11:43,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:11:43,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:11:43,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 955 transitions, 22039 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:11:43,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:43,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:11:43,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:47,363 INFO L124 PetriNetUnfolderBase]: 9129/13456 cut-off events. [2023-08-26 13:11:47,364 INFO L125 PetriNetUnfolderBase]: For 386327/386327 co-relation queries the response was YES. [2023-08-26 13:11:47,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125772 conditions, 13456 events. 9129/13456 cut-off events. For 386327/386327 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 80067 event pairs, 2039 based on Foata normal form. 20/13476 useless extension candidates. Maximal degree in co-relation 125657. Up to 8058 conditions per place. [2023-08-26 13:11:47,522 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 918 selfloop transitions, 126 changer transitions 1/1045 dead transitions. [2023-08-26 13:11:47,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 1045 transitions, 25265 flow [2023-08-26 13:11:47,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:11:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:11:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 691 transitions. [2023-08-26 13:11:47,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43295739348370926 [2023-08-26 13:11:47,524 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 691 transitions. [2023-08-26 13:11:47,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 691 transitions. [2023-08-26 13:11:47,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:47,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 691 transitions. [2023-08-26 13:11:47,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:47,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:47,527 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:47,527 INFO L175 Difference]: Start difference. First operand has 279 places, 955 transitions, 22039 flow. Second operand 7 states and 691 transitions. [2023-08-26 13:11:47,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 1045 transitions, 25265 flow [2023-08-26 13:11:50,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1045 transitions, 25055 flow, removed 29 selfloop flow, removed 3 redundant places. [2023-08-26 13:11:50,895 INFO L231 Difference]: Finished difference. Result has 282 places, 957 transitions, 22152 flow [2023-08-26 13:11:50,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=21829, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22152, PETRI_PLACES=282, PETRI_TRANSITIONS=957} [2023-08-26 13:11:50,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2023-08-26 13:11:50,896 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 957 transitions, 22152 flow [2023-08-26 13:11:50,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:11:50,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:50,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:50,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-26 13:11:50,897 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:50,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:50,897 INFO L85 PathProgramCache]: Analyzing trace with hash -338177123, now seen corresponding path program 9 times [2023-08-26 13:11:50,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:50,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702116206] [2023-08-26 13:11:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:50,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:51,015 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 13:11:51,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:51,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702116206] [2023-08-26 13:11:51,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702116206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:51,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:51,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:11:51,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760726967] [2023-08-26 13:11:51,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:51,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:11:51,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:51,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:11:51,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:11:51,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:11:51,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 957 transitions, 22152 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:11:51,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:51,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:11:51,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:54,946 INFO L124 PetriNetUnfolderBase]: 9102/13383 cut-off events. [2023-08-26 13:11:54,947 INFO L125 PetriNetUnfolderBase]: For 390508/390508 co-relation queries the response was YES. [2023-08-26 13:11:55,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125398 conditions, 13383 events. 9102/13383 cut-off events. For 390508/390508 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 79236 event pairs, 1864 based on Foata normal form. 68/13451 useless extension candidates. Maximal degree in co-relation 125283. Up to 8058 conditions per place. [2023-08-26 13:11:55,111 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 878 selfloop transitions, 195 changer transitions 1/1074 dead transitions. [2023-08-26 13:11:55,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1074 transitions, 25709 flow [2023-08-26 13:11:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:11:55,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:11:55,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 692 transitions. [2023-08-26 13:11:55,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43358395989974935 [2023-08-26 13:11:55,112 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 692 transitions. [2023-08-26 13:11:55,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 692 transitions. [2023-08-26 13:11:55,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:55,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 692 transitions. [2023-08-26 13:11:55,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.85714285714286) internal successors, (692), 7 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:55,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:55,115 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:55,115 INFO L175 Difference]: Start difference. First operand has 282 places, 957 transitions, 22152 flow. Second operand 7 states and 692 transitions. [2023-08-26 13:11:55,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1074 transitions, 25709 flow [2023-08-26 13:11:58,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1074 transitions, 25433 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-08-26 13:11:58,648 INFO L231 Difference]: Finished difference. Result has 284 places, 969 transitions, 22571 flow [2023-08-26 13:11:58,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=21824, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=763, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22571, PETRI_PLACES=284, PETRI_TRANSITIONS=969} [2023-08-26 13:11:58,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2023-08-26 13:11:58,649 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 969 transitions, 22571 flow [2023-08-26 13:11:58,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:11:58,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:58,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:58,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-26 13:11:58,649 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:11:58,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:58,649 INFO L85 PathProgramCache]: Analyzing trace with hash -761794979, now seen corresponding path program 11 times [2023-08-26 13:11:58,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:58,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333588087] [2023-08-26 13:11:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:58,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:58,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:58,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333588087] [2023-08-26 13:11:58,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333588087] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:58,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735896062] [2023-08-26 13:11:58,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:11:58,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:58,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:58,777 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:11:58,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-26 13:11:58,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:11:58,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:11:58,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 13:11:58,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:58,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:59,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735896062] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:59,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:59,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2023-08-26 13:11:59,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455926988] [2023-08-26 13:11:59,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:59,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 13:11:59,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:59,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 13:11:59,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-26 13:11:59,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:11:59,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 969 transitions, 22571 flow. Second operand has 12 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:59,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:59,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:11:59,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:03,990 INFO L124 PetriNetUnfolderBase]: 10081/15106 cut-off events. [2023-08-26 13:12:03,991 INFO L125 PetriNetUnfolderBase]: For 445052/445052 co-relation queries the response was YES. [2023-08-26 13:12:04,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143102 conditions, 15106 events. 10081/15106 cut-off events. For 445052/445052 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 95070 event pairs, 1664 based on Foata normal form. 40/15146 useless extension candidates. Maximal degree in co-relation 142986. Up to 8135 conditions per place. [2023-08-26 13:12:04,310 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 597 selfloop transitions, 736 changer transitions 5/1338 dead transitions. [2023-08-26 13:12:04,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 1338 transitions, 32219 flow [2023-08-26 13:12:04,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 13:12:04,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 13:12:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1673 transitions. [2023-08-26 13:12:04,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43163054695562436 [2023-08-26 13:12:04,313 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1673 transitions. [2023-08-26 13:12:04,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1673 transitions. [2023-08-26 13:12:04,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:04,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1673 transitions. [2023-08-26 13:12:04,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 98.41176470588235) internal successors, (1673), 17 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:04,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 228.0) internal successors, (4104), 18 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:04,318 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 228.0) internal successors, (4104), 18 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:04,318 INFO L175 Difference]: Start difference. First operand has 284 places, 969 transitions, 22571 flow. Second operand 17 states and 1673 transitions. [2023-08-26 13:12:04,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 1338 transitions, 32219 flow [2023-08-26 13:12:08,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 1338 transitions, 31805 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-26 13:12:08,172 INFO L231 Difference]: Finished difference. Result has 306 places, 1171 transitions, 30074 flow [2023-08-26 13:12:08,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=22195, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=30074, PETRI_PLACES=306, PETRI_TRANSITIONS=1171} [2023-08-26 13:12:08,173 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2023-08-26 13:12:08,173 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 1171 transitions, 30074 flow [2023-08-26 13:12:08,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:08,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:08,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:12:08,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-26 13:12:08,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:08,374 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:12:08,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:08,375 INFO L85 PathProgramCache]: Analyzing trace with hash -849306129, now seen corresponding path program 12 times [2023-08-26 13:12:08,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:08,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355100115] [2023-08-26 13:12:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:08,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:08,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:08,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355100115] [2023-08-26 13:12:08,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355100115] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:12:08,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702525795] [2023-08-26 13:12:08,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:12:08,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:08,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:12:08,497 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:12:08,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-26 13:12:08,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 13:12:08,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:12:08,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:12:08,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:12:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:08,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:12:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:08,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702525795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:12:08,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:12:08,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2023-08-26 13:12:08,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165075487] [2023-08-26 13:12:08,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:12:08,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 13:12:08,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:08,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 13:12:08,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-26 13:12:08,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:12:08,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 1171 transitions, 30074 flow. Second operand has 15 states, 15 states have (on average 90.46666666666667) internal successors, (1357), 15 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:08,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:08,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:12:08,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:14,735 INFO L124 PetriNetUnfolderBase]: 10879/16570 cut-off events. [2023-08-26 13:12:14,735 INFO L125 PetriNetUnfolderBase]: For 574443/574443 co-relation queries the response was YES. [2023-08-26 13:12:14,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166669 conditions, 16570 events. 10879/16570 cut-off events. For 574443/574443 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 108223 event pairs, 1089 based on Foata normal form. 70/16640 useless extension candidates. Maximal degree in co-relation 166544. Up to 6641 conditions per place. [2023-08-26 13:12:14,950 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 763 selfloop transitions, 862 changer transitions 4/1629 dead transitions. [2023-08-26 13:12:14,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1629 transitions, 41684 flow [2023-08-26 13:12:14,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 13:12:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 13:12:14,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2338 transitions. [2023-08-26 13:12:14,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427266081871345 [2023-08-26 13:12:14,953 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2338 transitions. [2023-08-26 13:12:14,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2338 transitions. [2023-08-26 13:12:14,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:14,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2338 transitions. [2023-08-26 13:12:14,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 97.41666666666667) internal successors, (2338), 24 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:14,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 228.0) internal successors, (5700), 25 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:14,959 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 228.0) internal successors, (5700), 25 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:14,959 INFO L175 Difference]: Start difference. First operand has 306 places, 1171 transitions, 30074 flow. Second operand 24 states and 2338 transitions. [2023-08-26 13:12:14,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1629 transitions, 41684 flow [2023-08-26 13:12:21,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1629 transitions, 40559 flow, removed 341 selfloop flow, removed 4 redundant places. [2023-08-26 13:12:21,949 INFO L231 Difference]: Finished difference. Result has 336 places, 1338 transitions, 36588 flow [2023-08-26 13:12:21,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=29311, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=711, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=36588, PETRI_PLACES=336, PETRI_TRANSITIONS=1338} [2023-08-26 13:12:21,951 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2023-08-26 13:12:21,951 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 1338 transitions, 36588 flow [2023-08-26 13:12:21,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 90.46666666666667) internal successors, (1357), 15 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:21,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:21,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:12:21,958 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 13:12:22,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:22,156 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:12:22,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:22,157 INFO L85 PathProgramCache]: Analyzing trace with hash 468797967, now seen corresponding path program 13 times [2023-08-26 13:12:22,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:22,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473323138] [2023-08-26 13:12:22,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:22,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:22,296 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 13:12:22,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:22,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473323138] [2023-08-26 13:12:22,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473323138] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:12:22,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:12:22,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:12:22,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068077061] [2023-08-26 13:12:22,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:12:22,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:12:22,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:22,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:12:22,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:12:22,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:12:22,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 1338 transitions, 36588 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:12:22,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:22,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:12:22,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:28,477 INFO L124 PetriNetUnfolderBase]: 10878/16547 cut-off events. [2023-08-26 13:12:28,477 INFO L125 PetriNetUnfolderBase]: For 643887/643887 co-relation queries the response was YES. [2023-08-26 13:12:28,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171867 conditions, 16547 events. 10878/16547 cut-off events. For 643887/643887 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 107719 event pairs, 2827 based on Foata normal form. 2/16549 useless extension candidates. Maximal degree in co-relation 171732. Up to 15564 conditions per place. [2023-08-26 13:12:28,845 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1220 selfloop transitions, 160 changer transitions 3/1383 dead transitions. [2023-08-26 13:12:28,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1383 transitions, 39878 flow [2023-08-26 13:12:28,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:12:28,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:12:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 671 transitions. [2023-08-26 13:12:28,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42042606516290726 [2023-08-26 13:12:28,846 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 671 transitions. [2023-08-26 13:12:28,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 671 transitions. [2023-08-26 13:12:28,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:28,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 671 transitions. [2023-08-26 13:12:28,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.85714285714286) internal successors, (671), 7 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:28,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:28,848 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:28,848 INFO L175 Difference]: Start difference. First operand has 336 places, 1338 transitions, 36588 flow. Second operand 7 states and 671 transitions. [2023-08-26 13:12:28,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1383 transitions, 39878 flow [2023-08-26 13:12:36,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1383 transitions, 39183 flow, removed 265 selfloop flow, removed 4 redundant places. [2023-08-26 13:12:36,576 INFO L231 Difference]: Finished difference. Result has 340 places, 1342 transitions, 36344 flow [2023-08-26 13:12:36,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=35896, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=36344, PETRI_PLACES=340, PETRI_TRANSITIONS=1342} [2023-08-26 13:12:36,577 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2023-08-26 13:12:36,578 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1342 transitions, 36344 flow [2023-08-26 13:12:36,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:12:36,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:36,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:12:36,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-26 13:12:36,578 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:12:36,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:36,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1115790837, now seen corresponding path program 14 times [2023-08-26 13:12:36,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:36,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541887930] [2023-08-26 13:12:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:36,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:36,687 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 13:12:36,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:36,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541887930] [2023-08-26 13:12:36,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541887930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:12:36,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:12:36,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:12:36,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432575910] [2023-08-26 13:12:36,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:12:36,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:12:36,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:36,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:12:36,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:12:36,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:12:36,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1342 transitions, 36344 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:12:36,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:36,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:12:36,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:42,831 INFO L124 PetriNetUnfolderBase]: 10862/16501 cut-off events. [2023-08-26 13:12:42,831 INFO L125 PetriNetUnfolderBase]: For 631466/631466 co-relation queries the response was YES. [2023-08-26 13:12:42,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169835 conditions, 16501 events. 10862/16501 cut-off events. For 631466/631466 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 107195 event pairs, 2824 based on Foata normal form. 16/16517 useless extension candidates. Maximal degree in co-relation 169697. Up to 15499 conditions per place. [2023-08-26 13:12:43,077 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1235 selfloop transitions, 149 changer transitions 1/1385 dead transitions. [2023-08-26 13:12:43,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1385 transitions, 39584 flow [2023-08-26 13:12:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:12:43,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:12:43,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 682 transitions. [2023-08-26 13:12:43,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273182957393484 [2023-08-26 13:12:43,079 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 682 transitions. [2023-08-26 13:12:43,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 682 transitions. [2023-08-26 13:12:43,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:43,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 682 transitions. [2023-08-26 13:12:43,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.42857142857143) internal successors, (682), 7 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:43,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:43,081 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:43,081 INFO L175 Difference]: Start difference. First operand has 340 places, 1342 transitions, 36344 flow. Second operand 7 states and 682 transitions. [2023-08-26 13:12:43,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1385 transitions, 39584 flow [2023-08-26 13:12:50,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1385 transitions, 39240 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-26 13:12:50,999 INFO L231 Difference]: Finished difference. Result has 343 places, 1345 transitions, 36387 flow [2023-08-26 13:12:51,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36012, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=36387, PETRI_PLACES=343, PETRI_TRANSITIONS=1345} [2023-08-26 13:12:51,000 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2023-08-26 13:12:51,001 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 1345 transitions, 36387 flow [2023-08-26 13:12:51,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:12:51,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:51,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:12:51,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-26 13:12:51,001 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:12:51,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:51,002 INFO L85 PathProgramCache]: Analyzing trace with hash 984480969, now seen corresponding path program 15 times [2023-08-26 13:12:51,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:51,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989905291] [2023-08-26 13:12:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:51,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:51,140 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 13:12:51,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:51,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989905291] [2023-08-26 13:12:51,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989905291] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:12:51,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:12:51,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:12:51,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274797184] [2023-08-26 13:12:51,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:12:51,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:12:51,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:51,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:12:51,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:12:51,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:12:51,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1345 transitions, 36387 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:12:51,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:51,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:12:51,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:57,478 INFO L124 PetriNetUnfolderBase]: 10866/16509 cut-off events. [2023-08-26 13:12:57,478 INFO L125 PetriNetUnfolderBase]: For 631122/631122 co-relation queries the response was YES. [2023-08-26 13:12:57,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169887 conditions, 16509 events. 10866/16509 cut-off events. For 631122/631122 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 107259 event pairs, 2825 based on Foata normal form. 2/16511 useless extension candidates. Maximal degree in co-relation 169747. Up to 15523 conditions per place. [2023-08-26 13:12:57,711 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1207 selfloop transitions, 167 changer transitions 3/1377 dead transitions. [2023-08-26 13:12:57,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1377 transitions, 39507 flow [2023-08-26 13:12:57,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:12:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:12:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 672 transitions. [2023-08-26 13:12:57,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2023-08-26 13:12:57,712 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 672 transitions. [2023-08-26 13:12:57,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 672 transitions. [2023-08-26 13:12:57,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:57,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 672 transitions. [2023-08-26 13:12:57,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:57,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:57,714 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:57,714 INFO L175 Difference]: Start difference. First operand has 343 places, 1345 transitions, 36387 flow. Second operand 7 states and 672 transitions. [2023-08-26 13:12:57,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1377 transitions, 39507 flow [2023-08-26 13:13:05,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1377 transitions, 39212 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 13:13:05,960 INFO L231 Difference]: Finished difference. Result has 349 places, 1351 transitions, 36651 flow [2023-08-26 13:13:05,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36104, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=36651, PETRI_PLACES=349, PETRI_TRANSITIONS=1351} [2023-08-26 13:13:05,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2023-08-26 13:13:05,961 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 1351 transitions, 36651 flow [2023-08-26 13:13:05,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:13:05,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:13:05,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:13:05,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-26 13:13:05,961 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:13:05,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:13:05,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1336856659, now seen corresponding path program 16 times [2023-08-26 13:13:05,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:13:05,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477605376] [2023-08-26 13:13:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:13:05,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:13:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:13:06,086 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 13:13:06,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:13:06,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477605376] [2023-08-26 13:13:06,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477605376] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:13:06,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:13:06,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:13:06,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516418897] [2023-08-26 13:13:06,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:13:06,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:13:06,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:13:06,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:13:06,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:13:06,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:13:06,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 1351 transitions, 36651 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:13:06,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:13:06,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:13:06,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:13:12,230 INFO L124 PetriNetUnfolderBase]: 10864/16507 cut-off events. [2023-08-26 13:13:12,231 INFO L125 PetriNetUnfolderBase]: For 630983/630983 co-relation queries the response was YES. [2023-08-26 13:13:12,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170154 conditions, 16507 events. 10864/16507 cut-off events. For 630983/630983 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 107155 event pairs, 2814 based on Foata normal form. 2/16509 useless extension candidates. Maximal degree in co-relation 170011. Up to 15523 conditions per place. [2023-08-26 13:13:12,451 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1222 selfloop transitions, 154 changer transitions 3/1379 dead transitions. [2023-08-26 13:13:12,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1379 transitions, 39703 flow [2023-08-26 13:13:12,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:13:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:13:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 674 transitions. [2023-08-26 13:13:12,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223057644110276 [2023-08-26 13:13:12,454 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 674 transitions. [2023-08-26 13:13:12,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 674 transitions. [2023-08-26 13:13:12,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:13:12,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 674 transitions. [2023-08-26 13:13:12,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.28571428571429) internal successors, (674), 7 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:12,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:12,456 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:12,456 INFO L175 Difference]: Start difference. First operand has 349 places, 1351 transitions, 36651 flow. Second operand 7 states and 674 transitions. [2023-08-26 13:13:12,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1379 transitions, 39703 flow [2023-08-26 13:13:21,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1379 transitions, 39529 flow, removed 22 selfloop flow, removed 1 redundant places. [2023-08-26 13:13:21,329 INFO L231 Difference]: Finished difference. Result has 355 places, 1354 transitions, 36902 flow [2023-08-26 13:13:21,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36477, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=36902, PETRI_PLACES=355, PETRI_TRANSITIONS=1354} [2023-08-26 13:13:21,330 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 314 predicate places. [2023-08-26 13:13:21,330 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 1354 transitions, 36902 flow [2023-08-26 13:13:21,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:13:21,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:13:21,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:13:21,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-26 13:13:21,331 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:13:21,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:13:21,331 INFO L85 PathProgramCache]: Analyzing trace with hash 242765071, now seen corresponding path program 17 times [2023-08-26 13:13:21,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:13:21,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183780033] [2023-08-26 13:13:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:13:21,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:13:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:13:21,433 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 13:13:21,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:13:21,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183780033] [2023-08-26 13:13:21,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183780033] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:13:21,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:13:21,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:13:21,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425508595] [2023-08-26 13:13:21,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:13:21,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:13:21,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:13:21,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:13:21,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:13:21,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:13:21,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 1354 transitions, 36902 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:13:21,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:13:21,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:13:21,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:13:27,552 INFO L124 PetriNetUnfolderBase]: 10869/16514 cut-off events. [2023-08-26 13:13:27,552 INFO L125 PetriNetUnfolderBase]: For 636443/636443 co-relation queries the response was YES. [2023-08-26 13:13:27,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170454 conditions, 16514 events. 10869/16514 cut-off events. For 636443/636443 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 107255 event pairs, 2816 based on Foata normal form. 2/16516 useless extension candidates. Maximal degree in co-relation 170309. Up to 15527 conditions per place. [2023-08-26 13:13:27,790 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1222 selfloop transitions, 157 changer transitions 3/1382 dead transitions. [2023-08-26 13:13:27,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1382 transitions, 39955 flow [2023-08-26 13:13:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:13:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:13:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 675 transitions. [2023-08-26 13:13:27,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42293233082706766 [2023-08-26 13:13:27,792 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 675 transitions. [2023-08-26 13:13:27,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 675 transitions. [2023-08-26 13:13:27,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:13:27,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 675 transitions. [2023-08-26 13:13:27,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.42857142857143) internal successors, (675), 7 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:27,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:27,794 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:27,794 INFO L175 Difference]: Start difference. First operand has 355 places, 1354 transitions, 36902 flow. Second operand 7 states and 675 transitions. [2023-08-26 13:13:27,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1382 transitions, 39955 flow [2023-08-26 13:13:35,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1382 transitions, 39655 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-26 13:13:35,958 INFO L231 Difference]: Finished difference. Result has 359 places, 1357 transitions, 36998 flow [2023-08-26 13:13:35,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36606, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=36998, PETRI_PLACES=359, PETRI_TRANSITIONS=1357} [2023-08-26 13:13:35,959 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2023-08-26 13:13:35,959 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 1357 transitions, 36998 flow [2023-08-26 13:13:35,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:13:35,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:13:35,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:13:35,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-26 13:13:35,960 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:13:35,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:13:35,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1331468597, now seen corresponding path program 18 times [2023-08-26 13:13:35,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:13:35,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921541374] [2023-08-26 13:13:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:13:35,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:13:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:13:36,077 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 13:13:36,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:13:36,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921541374] [2023-08-26 13:13:36,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921541374] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:13:36,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:13:36,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:13:36,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775493766] [2023-08-26 13:13:36,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:13:36,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:13:36,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:13:36,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:13:36,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:13:36,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:13:36,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 1357 transitions, 36998 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:13:36,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:13:36,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:13:36,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:13:42,390 INFO L124 PetriNetUnfolderBase]: 10888/16547 cut-off events. [2023-08-26 13:13:42,390 INFO L125 PetriNetUnfolderBase]: For 631451/631451 co-relation queries the response was YES. [2023-08-26 13:13:42,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170807 conditions, 16547 events. 10888/16547 cut-off events. For 631451/631451 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 107523 event pairs, 2810 based on Foata normal form. 16/16563 useless extension candidates. Maximal degree in co-relation 170661. Up to 15541 conditions per place. [2023-08-26 13:13:42,640 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1231 selfloop transitions, 160 changer transitions 1/1392 dead transitions. [2023-08-26 13:13:42,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1392 transitions, 40157 flow [2023-08-26 13:13:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:13:42,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:13:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 681 transitions. [2023-08-26 13:13:42,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266917293233083 [2023-08-26 13:13:42,642 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 681 transitions. [2023-08-26 13:13:42,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 681 transitions. [2023-08-26 13:13:42,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:13:42,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 681 transitions. [2023-08-26 13:13:42,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.28571428571429) internal successors, (681), 7 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:42,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:42,643 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:42,643 INFO L175 Difference]: Start difference. First operand has 359 places, 1357 transitions, 36998 flow. Second operand 7 states and 681 transitions. [2023-08-26 13:13:42,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1392 transitions, 40157 flow [2023-08-26 13:13:51,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1392 transitions, 39988 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 13:13:51,080 INFO L231 Difference]: Finished difference. Result has 363 places, 1360 transitions, 37247 flow [2023-08-26 13:13:51,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36829, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37247, PETRI_PLACES=363, PETRI_TRANSITIONS=1360} [2023-08-26 13:13:51,081 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2023-08-26 13:13:51,082 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1360 transitions, 37247 flow [2023-08-26 13:13:51,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:13:51,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:13:51,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:13:51,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-26 13:13:51,082 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:13:51,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:13:51,083 INFO L85 PathProgramCache]: Analyzing trace with hash -109610619, now seen corresponding path program 19 times [2023-08-26 13:13:51,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:13:51,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535567129] [2023-08-26 13:13:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:13:51,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:13:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:13:51,196 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 13:13:51,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:13:51,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535567129] [2023-08-26 13:13:51,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535567129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:13:51,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:13:51,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:13:51,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232498230] [2023-08-26 13:13:51,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:13:51,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:13:51,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:13:51,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:13:51,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:13:51,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:13:51,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1360 transitions, 37247 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:13:51,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:13:51,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:13:51,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:13:57,426 INFO L124 PetriNetUnfolderBase]: 10886/16545 cut-off events. [2023-08-26 13:13:57,426 INFO L125 PetriNetUnfolderBase]: For 638064/638064 co-relation queries the response was YES. [2023-08-26 13:13:57,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171026 conditions, 16545 events. 10886/16545 cut-off events. For 638064/638064 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 107601 event pairs, 2813 based on Foata normal form. 2/16547 useless extension candidates. Maximal degree in co-relation 170879. Up to 15561 conditions per place. [2023-08-26 13:13:57,688 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1212 selfloop transitions, 170 changer transitions 3/1385 dead transitions. [2023-08-26 13:13:57,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1385 transitions, 40206 flow [2023-08-26 13:13:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:13:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:13:57,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 673 transitions. [2023-08-26 13:13:57,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216791979949875 [2023-08-26 13:13:57,691 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 673 transitions. [2023-08-26 13:13:57,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 673 transitions. [2023-08-26 13:13:57,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:13:57,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 673 transitions. [2023-08-26 13:13:57,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.14285714285714) internal successors, (673), 7 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:57,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:57,693 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:57,694 INFO L175 Difference]: Start difference. First operand has 363 places, 1360 transitions, 37247 flow. Second operand 7 states and 673 transitions. [2023-08-26 13:13:57,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1385 transitions, 40206 flow [2023-08-26 13:14:06,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 1385 transitions, 39874 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-26 13:14:06,039 INFO L231 Difference]: Finished difference. Result has 364 places, 1359 transitions, 37222 flow [2023-08-26 13:14:06,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36882, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37222, PETRI_PLACES=364, PETRI_TRANSITIONS=1359} [2023-08-26 13:14:06,040 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2023-08-26 13:14:06,041 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 1359 transitions, 37222 flow [2023-08-26 13:14:06,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:14:06,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:14:06,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:14:06,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-26 13:14:06,041 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:14:06,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:14:06,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1683844287, now seen corresponding path program 20 times [2023-08-26 13:14:06,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:14:06,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344324878] [2023-08-26 13:14:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:14:06,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:14:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:14:06,150 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 13:14:06,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:14:06,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344324878] [2023-08-26 13:14:06,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344324878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:14:06,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:14:06,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:14:06,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749719298] [2023-08-26 13:14:06,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:14:06,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:14:06,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:14:06,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:14:06,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:14:06,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:14:06,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 1359 transitions, 37222 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:14:06,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:14:06,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:14:06,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:14:12,575 INFO L124 PetriNetUnfolderBase]: 10864/16483 cut-off events. [2023-08-26 13:14:12,575 INFO L125 PetriNetUnfolderBase]: For 642494/642494 co-relation queries the response was YES. [2023-08-26 13:14:12,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170530 conditions, 16483 events. 10864/16483 cut-off events. For 642494/642494 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 106834 event pairs, 2792 based on Foata normal form. 16/16499 useless extension candidates. Maximal degree in co-relation 170383. Up to 15480 conditions per place. [2023-08-26 13:14:12,844 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1218 selfloop transitions, 173 changer transitions 1/1392 dead transitions. [2023-08-26 13:14:12,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1392 transitions, 40304 flow [2023-08-26 13:14:12,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:14:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:14:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 679 transitions. [2023-08-26 13:14:12,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42543859649122806 [2023-08-26 13:14:12,845 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 679 transitions. [2023-08-26 13:14:12,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 679 transitions. [2023-08-26 13:14:12,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:14:12,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 679 transitions. [2023-08-26 13:14:12,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:12,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:12,848 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:12,848 INFO L175 Difference]: Start difference. First operand has 364 places, 1359 transitions, 37222 flow. Second operand 7 states and 679 transitions. [2023-08-26 13:14:12,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1392 transitions, 40304 flow [2023-08-26 13:14:21,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1392 transitions, 39958 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-26 13:14:21,095 INFO L231 Difference]: Finished difference. Result has 366 places, 1359 transitions, 37232 flow [2023-08-26 13:14:21,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36876, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37232, PETRI_PLACES=366, PETRI_TRANSITIONS=1359} [2023-08-26 13:14:21,097 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2023-08-26 13:14:21,097 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 1359 transitions, 37232 flow [2023-08-26 13:14:21,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:14:21,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:14:21,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:14:21,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-26 13:14:21,097 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:14:21,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:14:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash 804563877, now seen corresponding path program 5 times [2023-08-26 13:14:21,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:14:21,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780537139] [2023-08-26 13:14:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:14:21,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:14:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:14:21,215 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 13:14:21,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:14:21,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780537139] [2023-08-26 13:14:21,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780537139] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:14:21,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:14:21,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:14:21,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812948765] [2023-08-26 13:14:21,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:14:21,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:14:21,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:14:21,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:14:21,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:14:21,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:14:21,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1359 transitions, 37232 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:14:21,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:14:21,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:14:21,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:14:27,520 INFO L124 PetriNetUnfolderBase]: 10875/16541 cut-off events. [2023-08-26 13:14:27,520 INFO L125 PetriNetUnfolderBase]: For 639038/639038 co-relation queries the response was YES. [2023-08-26 13:14:27,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170835 conditions, 16541 events. 10875/16541 cut-off events. For 639038/639038 co-relation queries the response was YES. Maximal size of possible extension queue 978. Compared 107803 event pairs, 2774 based on Foata normal form. 30/16571 useless extension candidates. Maximal degree in co-relation 170687. Up to 15375 conditions per place. [2023-08-26 13:14:27,752 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 1239 selfloop transitions, 160 changer transitions 13/1412 dead transitions. [2023-08-26 13:14:27,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1412 transitions, 40570 flow [2023-08-26 13:14:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:14:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:14:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 689 transitions. [2023-08-26 13:14:27,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317042606516291 [2023-08-26 13:14:27,754 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 689 transitions. [2023-08-26 13:14:27,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 689 transitions. [2023-08-26 13:14:27,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:14:27,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 689 transitions. [2023-08-26 13:14:27,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.42857142857143) internal successors, (689), 7 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:27,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:27,756 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:27,756 INFO L175 Difference]: Start difference. First operand has 366 places, 1359 transitions, 37232 flow. Second operand 7 states and 689 transitions. [2023-08-26 13:14:27,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1412 transitions, 40570 flow [2023-08-26 13:14:36,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1412 transitions, 40262 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-26 13:14:36,136 INFO L231 Difference]: Finished difference. Result has 371 places, 1360 transitions, 37290 flow [2023-08-26 13:14:36,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36888, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37290, PETRI_PLACES=371, PETRI_TRANSITIONS=1360} [2023-08-26 13:14:36,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2023-08-26 13:14:36,138 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 1360 transitions, 37290 flow [2023-08-26 13:14:36,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:14:36,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:14:36,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:14:36,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-26 13:14:36,138 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:14:36,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:14:36,139 INFO L85 PathProgramCache]: Analyzing trace with hash -11972683, now seen corresponding path program 6 times [2023-08-26 13:14:36,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:14:36,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938363960] [2023-08-26 13:14:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:14:36,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:14:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:14:36,270 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 13:14:36,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:14:36,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938363960] [2023-08-26 13:14:36,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938363960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:14:36,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:14:36,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:14:36,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593720010] [2023-08-26 13:14:36,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:14:36,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:14:36,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:14:36,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:14:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:14:36,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:14:36,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 1360 transitions, 37290 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:14:36,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:14:36,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:14:36,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:14:42,538 INFO L124 PetriNetUnfolderBase]: 10803/16416 cut-off events. [2023-08-26 13:14:42,538 INFO L125 PetriNetUnfolderBase]: For 642835/642835 co-relation queries the response was YES. [2023-08-26 13:14:42,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169748 conditions, 16416 events. 10803/16416 cut-off events. For 642835/642835 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 106629 event pairs, 2772 based on Foata normal form. 24/16440 useless extension candidates. Maximal degree in co-relation 169597. Up to 15370 conditions per place. [2023-08-26 13:14:42,778 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 1230 selfloop transitions, 148 changer transitions 21/1399 dead transitions. [2023-08-26 13:14:42,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1399 transitions, 40305 flow [2023-08-26 13:14:42,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:14:42,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:14:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 686 transitions. [2023-08-26 13:14:42,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2023-08-26 13:14:42,779 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 686 transitions. [2023-08-26 13:14:42,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 686 transitions. [2023-08-26 13:14:42,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:14:42,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 686 transitions. [2023-08-26 13:14:42,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.0) internal successors, (686), 7 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:42,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:42,781 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:42,781 INFO L175 Difference]: Start difference. First operand has 371 places, 1360 transitions, 37290 flow. Second operand 7 states and 686 transitions. [2023-08-26 13:14:42,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1399 transitions, 40305 flow [2023-08-26 13:14:50,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 1399 transitions, 39992 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 13:14:50,658 INFO L231 Difference]: Finished difference. Result has 374 places, 1352 transitions, 37063 flow [2023-08-26 13:14:50,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36852, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37063, PETRI_PLACES=374, PETRI_TRANSITIONS=1352} [2023-08-26 13:14:50,659 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2023-08-26 13:14:50,660 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1352 transitions, 37063 flow [2023-08-26 13:14:50,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:14:50,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:14:50,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:14:50,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-26 13:14:50,660 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:14:50,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:14:50,660 INFO L85 PathProgramCache]: Analyzing trace with hash -899134851, now seen corresponding path program 7 times [2023-08-26 13:14:50,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:14:50,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055999884] [2023-08-26 13:14:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:14:50,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:14:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:14:50,803 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 13:14:50,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:14:50,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055999884] [2023-08-26 13:14:50,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055999884] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:14:50,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:14:50,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:14:50,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749928039] [2023-08-26 13:14:50,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:14:50,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:14:50,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:14:50,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:14:50,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:14:50,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:14:50,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1352 transitions, 37063 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:14:50,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:14:50,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:14:50,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:14:57,003 INFO L124 PetriNetUnfolderBase]: 10791/16373 cut-off events. [2023-08-26 13:14:57,003 INFO L125 PetriNetUnfolderBase]: For 640820/640820 co-relation queries the response was YES. [2023-08-26 13:14:57,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169514 conditions, 16373 events. 10791/16373 cut-off events. For 640820/640820 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 105976 event pairs, 2748 based on Foata normal form. 8/16381 useless extension candidates. Maximal degree in co-relation 169362. Up to 15296 conditions per place. [2023-08-26 13:14:57,242 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 1229 selfloop transitions, 163 changer transitions 1/1393 dead transitions. [2023-08-26 13:14:57,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1393 transitions, 40265 flow [2023-08-26 13:14:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:14:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:14:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 683 transitions. [2023-08-26 13:14:57,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42794486215538846 [2023-08-26 13:14:57,243 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 683 transitions. [2023-08-26 13:14:57,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 683 transitions. [2023-08-26 13:14:57,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:14:57,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 683 transitions. [2023-08-26 13:14:57,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.57142857142857) internal successors, (683), 7 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:57,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:57,246 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:57,246 INFO L175 Difference]: Start difference. First operand has 374 places, 1352 transitions, 37063 flow. Second operand 7 states and 683 transitions. [2023-08-26 13:14:57,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1393 transitions, 40265 flow [2023-08-26 13:15:04,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 1393 transitions, 39967 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-26 13:15:04,942 INFO L231 Difference]: Finished difference. Result has 374 places, 1355 transitions, 37191 flow [2023-08-26 13:15:04,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36765, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37191, PETRI_PLACES=374, PETRI_TRANSITIONS=1355} [2023-08-26 13:15:04,943 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2023-08-26 13:15:04,943 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1355 transitions, 37191 flow [2023-08-26 13:15:04,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:15:04,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:15:04,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:15:04,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-26 13:15:04,944 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:15:04,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:15:04,944 INFO L85 PathProgramCache]: Analyzing trace with hash 179493245, now seen corresponding path program 21 times [2023-08-26 13:15:04,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:15:04,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687167745] [2023-08-26 13:15:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:15:04,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:15:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:15:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:15:05,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:15:05,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687167745] [2023-08-26 13:15:05,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687167745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:15:05,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664623831] [2023-08-26 13:15:05,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:15:05,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:15:05,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:15:05,060 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:15:05,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-26 13:15:05,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:15:05,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:15:05,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:15:05,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:15:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:15:05,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:15:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:15:05,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664623831] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:15:05,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:15:05,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-08-26 13:15:05,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925513195] [2023-08-26 13:15:05,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:15:05,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:15:05,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:15:05,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:15:05,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:15:05,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:15:05,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1355 transitions, 37191 flow. Second operand has 16 states, 16 states have (on average 90.625) internal successors, (1450), 16 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:05,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:15:05,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:15:05,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:15:12,744 INFO L124 PetriNetUnfolderBase]: 12131/18165 cut-off events. [2023-08-26 13:15:12,744 INFO L125 PetriNetUnfolderBase]: For 721044/721044 co-relation queries the response was YES. [2023-08-26 13:15:12,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190208 conditions, 18165 events. 12131/18165 cut-off events. For 721044/721044 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 116877 event pairs, 2478 based on Foata normal form. 42/18207 useless extension candidates. Maximal degree in co-relation 190056. Up to 14990 conditions per place. [2023-08-26 13:15:13,013 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1283 selfloop transitions, 544 changer transitions 1/1828 dead transitions. [2023-08-26 13:15:13,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1828 transitions, 51526 flow [2023-08-26 13:15:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-26 13:15:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-26 13:15:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2035 transitions. [2023-08-26 13:15:13,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42502088554720135 [2023-08-26 13:15:13,015 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2035 transitions. [2023-08-26 13:15:13,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2035 transitions. [2023-08-26 13:15:13,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:15:13,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2035 transitions. [2023-08-26 13:15:13,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 96.9047619047619) internal successors, (2035), 21 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:13,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 228.0) internal successors, (5016), 22 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:13,020 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 228.0) internal successors, (5016), 22 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:13,020 INFO L175 Difference]: Start difference. First operand has 374 places, 1355 transitions, 37191 flow. Second operand 21 states and 2035 transitions. [2023-08-26 13:15:13,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1828 transitions, 51526 flow [2023-08-26 13:15:22,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 1828 transitions, 51150 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-26 13:15:22,313 INFO L231 Difference]: Finished difference. Result has 398 places, 1602 transitions, 45174 flow [2023-08-26 13:15:22,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36841, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=913, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=45174, PETRI_PLACES=398, PETRI_TRANSITIONS=1602} [2023-08-26 13:15:22,314 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2023-08-26 13:15:22,314 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1602 transitions, 45174 flow [2023-08-26 13:15:22,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 90.625) internal successors, (1450), 16 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:22,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:15:22,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:15:22,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-26 13:15:22,515 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,SelfDestructingSolverStorable44 [2023-08-26 13:15:22,515 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:15:22,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:15:22,515 INFO L85 PathProgramCache]: Analyzing trace with hash -58728773, now seen corresponding path program 22 times [2023-08-26 13:15:22,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:15:22,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529895771] [2023-08-26 13:15:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:15:22,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:15:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:15:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:15:22,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:15:22,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529895771] [2023-08-26 13:15:22,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529895771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:15:22,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103275522] [2023-08-26 13:15:22,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:15:22,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:15:22,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:15:22,625 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:15:22,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-26 13:15:22,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:15:22,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:15:22,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 13:15:22,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:15:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:15:22,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:15:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:15:22,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103275522] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:15:22,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:15:22,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-08-26 13:15:22,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611942242] [2023-08-26 13:15:22,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:15:22,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:15:22,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:15:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:15:22,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:15:22,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:15:22,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1602 transitions, 45174 flow. Second operand has 16 states, 16 states have (on average 90.125) internal successors, (1442), 16 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:22,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:15:22,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:15:22,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:15:31,257 INFO L124 PetriNetUnfolderBase]: 12162/18228 cut-off events. [2023-08-26 13:15:31,257 INFO L125 PetriNetUnfolderBase]: For 770626/770626 co-relation queries the response was YES. [2023-08-26 13:15:31,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198095 conditions, 18228 events. 12162/18228 cut-off events. For 770626/770626 co-relation queries the response was YES. Maximal size of possible extension queue 1066. Compared 117606 event pairs, 2479 based on Foata normal form. 66/18294 useless extension candidates. Maximal degree in co-relation 197935. Up to 14917 conditions per place. [2023-08-26 13:15:31,561 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1283 selfloop transitions, 562 changer transitions 1/1846 dead transitions. [2023-08-26 13:15:31,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1846 transitions, 53530 flow [2023-08-26 13:15:31,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 13:15:31,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 13:15:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1855 transitions. [2023-08-26 13:15:31,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42820867959372116 [2023-08-26 13:15:31,564 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1855 transitions. [2023-08-26 13:15:31,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1855 transitions. [2023-08-26 13:15:31,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:15:31,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1855 transitions. [2023-08-26 13:15:31,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 97.63157894736842) internal successors, (1855), 19 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:31,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 228.0) internal successors, (4560), 20 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:31,569 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 228.0) internal successors, (4560), 20 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:31,569 INFO L175 Difference]: Start difference. First operand has 398 places, 1602 transitions, 45174 flow. Second operand 19 states and 1855 transitions. [2023-08-26 13:15:31,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1846 transitions, 53530 flow [2023-08-26 13:15:43,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 1846 transitions, 52522 flow, removed 487 selfloop flow, removed 1 redundant places. [2023-08-26 13:15:43,044 INFO L231 Difference]: Finished difference. Result has 418 places, 1613 transitions, 45760 flow [2023-08-26 13:15:43,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=44172, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1041, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=45760, PETRI_PLACES=418, PETRI_TRANSITIONS=1613} [2023-08-26 13:15:43,046 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 377 predicate places. [2023-08-26 13:15:43,046 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 1613 transitions, 45760 flow [2023-08-26 13:15:43,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 90.125) internal successors, (1442), 16 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:43,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:15:43,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:15:43,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-26 13:15:43,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:15:43,247 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:15:43,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:15:43,247 INFO L85 PathProgramCache]: Analyzing trace with hash 506039925, now seen corresponding path program 10 times [2023-08-26 13:15:43,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:15:43,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719616794] [2023-08-26 13:15:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:15:43,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:15:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:15:43,355 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 13:15:43,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:15:43,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719616794] [2023-08-26 13:15:43,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719616794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:15:43,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:15:43,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:15:43,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026227279] [2023-08-26 13:15:43,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:15:43,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:15:43,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:15:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:15:43,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:15:43,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:15:43,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 1613 transitions, 45760 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:15:43,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:15:43,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:15:43,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:15:51,713 INFO L124 PetriNetUnfolderBase]: 12526/18850 cut-off events. [2023-08-26 13:15:51,714 INFO L125 PetriNetUnfolderBase]: For 791033/791033 co-relation queries the response was YES. [2023-08-26 13:15:51,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203166 conditions, 18850 events. 12526/18850 cut-off events. For 791033/791033 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 122816 event pairs, 2550 based on Foata normal form. 18/18868 useless extension candidates. Maximal degree in co-relation 203002. Up to 11212 conditions per place. [2023-08-26 13:15:52,029 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1038 selfloop transitions, 701 changer transitions 1/1740 dead transitions. [2023-08-26 13:15:52,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 1740 transitions, 51408 flow [2023-08-26 13:15:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 13:15:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 13:15:52,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 984 transitions. [2023-08-26 13:15:52,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43157894736842106 [2023-08-26 13:15:52,031 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 984 transitions. [2023-08-26 13:15:52,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 984 transitions. [2023-08-26 13:15:52,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:15:52,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 984 transitions. [2023-08-26 13:15:52,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 98.4) internal successors, (984), 10 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:52,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 228.0) internal successors, (2508), 11 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:52,034 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 228.0) internal successors, (2508), 11 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:52,034 INFO L175 Difference]: Start difference. First operand has 418 places, 1613 transitions, 45760 flow. Second operand 10 states and 984 transitions. [2023-08-26 13:15:52,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 1740 transitions, 51408 flow [2023-08-26 13:16:03,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1740 transitions, 50592 flow, removed 38 selfloop flow, removed 16 redundant places. [2023-08-26 13:16:03,348 INFO L231 Difference]: Finished difference. Result has 414 places, 1651 transitions, 48819 flow [2023-08-26 13:16:03,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=44897, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=661, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=932, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=48819, PETRI_PLACES=414, PETRI_TRANSITIONS=1651} [2023-08-26 13:16:03,350 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 373 predicate places. [2023-08-26 13:16:03,350 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1651 transitions, 48819 flow [2023-08-26 13:16:03,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:16:03,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:16:03,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:16:03,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-26 13:16:03,351 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:16:03,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:16:03,351 INFO L85 PathProgramCache]: Analyzing trace with hash 737271327, now seen corresponding path program 11 times [2023-08-26 13:16:03,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:16:03,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385383506] [2023-08-26 13:16:03,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:16:03,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:16:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:16:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:03,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:16:03,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385383506] [2023-08-26 13:16:03,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385383506] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:16:03,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607595068] [2023-08-26 13:16:03,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:16:03,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:16:03,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:16:03,462 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:16:03,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-26 13:16:03,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:16:03,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:16:03,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:16:03,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:16:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:03,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:16:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:03,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607595068] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:16:03,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:16:03,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2023-08-26 13:16:03,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710291641] [2023-08-26 13:16:03,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:16:03,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 13:16:03,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:16:03,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 13:16:03,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-08-26 13:16:03,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:16:03,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1651 transitions, 48819 flow. Second operand has 17 states, 17 states have (on average 90.11764705882354) internal successors, (1532), 17 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:03,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:16:03,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:16:03,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:16:13,110 INFO L124 PetriNetUnfolderBase]: 12833/19243 cut-off events. [2023-08-26 13:16:13,110 INFO L125 PetriNetUnfolderBase]: For 896714/896714 co-relation queries the response was YES. [2023-08-26 13:16:13,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213336 conditions, 19243 events. 12833/19243 cut-off events. For 896714/896714 co-relation queries the response was YES. Maximal size of possible extension queue 1128. Compared 125385 event pairs, 2820 based on Foata normal form. 76/19319 useless extension candidates. Maximal degree in co-relation 213171. Up to 16480 conditions per place. [2023-08-26 13:16:13,414 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1541 selfloop transitions, 418 changer transitions 1/1960 dead transitions. [2023-08-26 13:16:13,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 1960 transitions, 58932 flow [2023-08-26 13:16:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 13:16:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 13:16:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1843 transitions. [2023-08-26 13:16:13,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42543859649122806 [2023-08-26 13:16:13,416 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1843 transitions. [2023-08-26 13:16:13,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1843 transitions. [2023-08-26 13:16:13,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:16:13,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1843 transitions. [2023-08-26 13:16:13,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 97.0) internal successors, (1843), 19 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:13,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 228.0) internal successors, (4560), 20 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:13,421 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 228.0) internal successors, (4560), 20 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:13,421 INFO L175 Difference]: Start difference. First operand has 414 places, 1651 transitions, 48819 flow. Second operand 19 states and 1843 transitions. [2023-08-26 13:16:13,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 1960 transitions, 58932 flow [2023-08-26 13:16:26,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1960 transitions, 58800 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 13:16:26,040 INFO L231 Difference]: Finished difference. Result has 439 places, 1756 transitions, 52849 flow [2023-08-26 13:16:26,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=48710, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=52849, PETRI_PLACES=439, PETRI_TRANSITIONS=1756} [2023-08-26 13:16:26,041 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2023-08-26 13:16:26,042 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 1756 transitions, 52849 flow [2023-08-26 13:16:26,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 90.11764705882354) internal successors, (1532), 17 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:26,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:16:26,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:16:26,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-26 13:16:26,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:16:26,243 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:16:26,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:16:26,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1872988975, now seen corresponding path program 12 times [2023-08-26 13:16:26,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:16:26,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818586923] [2023-08-26 13:16:26,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:16:26,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:16:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:16:26,347 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 13:16:26,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:16:26,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818586923] [2023-08-26 13:16:26,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818586923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:16:26,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:16:26,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:16:26,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233870717] [2023-08-26 13:16:26,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:16:26,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:16:26,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:16:26,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:16:26,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:16:26,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:16:26,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 1756 transitions, 52849 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:16:26,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:16:26,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:16:26,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:16:36,243 INFO L124 PetriNetUnfolderBase]: 12832/19246 cut-off events. [2023-08-26 13:16:36,244 INFO L125 PetriNetUnfolderBase]: For 917944/917944 co-relation queries the response was YES. [2023-08-26 13:16:36,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218846 conditions, 19246 events. 12832/19246 cut-off events. For 917944/917944 co-relation queries the response was YES. Maximal size of possible extension queue 1131. Compared 125185 event pairs, 3135 based on Foata normal form. 4/19250 useless extension candidates. Maximal degree in co-relation 218669. Up to 18177 conditions per place. [2023-08-26 13:16:36,772 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1577 selfloop transitions, 197 changer transitions 5/1779 dead transitions. [2023-08-26 13:16:36,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1779 transitions, 56574 flow [2023-08-26 13:16:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:16:36,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:16:36,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 678 transitions. [2023-08-26 13:16:36,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424812030075188 [2023-08-26 13:16:36,773 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 678 transitions. [2023-08-26 13:16:36,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 678 transitions. [2023-08-26 13:16:36,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:16:36,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 678 transitions. [2023-08-26 13:16:36,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.85714285714286) internal successors, (678), 7 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:36,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:36,775 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:36,775 INFO L175 Difference]: Start difference. First operand has 439 places, 1756 transitions, 52849 flow. Second operand 7 states and 678 transitions. [2023-08-26 13:16:36,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1779 transitions, 56574 flow [2023-08-26 13:16:51,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1779 transitions, 55692 flow, removed 215 selfloop flow, removed 5 redundant places. [2023-08-26 13:16:51,432 INFO L231 Difference]: Finished difference. Result has 442 places, 1756 transitions, 52368 flow [2023-08-26 13:16:51,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=51967, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52368, PETRI_PLACES=442, PETRI_TRANSITIONS=1756} [2023-08-26 13:16:51,433 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 401 predicate places. [2023-08-26 13:16:51,433 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1756 transitions, 52368 flow [2023-08-26 13:16:51,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:16:51,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:16:51,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:16:51,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-08-26 13:16:51,434 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:16:51,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:16:51,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1375624529, now seen corresponding path program 13 times [2023-08-26 13:16:51,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:16:51,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587258401] [2023-08-26 13:16:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:16:51,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:16:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:16:51,540 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 13:16:51,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:16:51,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587258401] [2023-08-26 13:16:51,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587258401] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:16:51,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:16:51,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:16:51,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553743791] [2023-08-26 13:16:51,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:16:51,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:16:51,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:16:51,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:16:51,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:16:51,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:16:51,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1756 transitions, 52368 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:16:51,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:16:51,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:16:51,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:17:00,669 INFO L124 PetriNetUnfolderBase]: 12841/19259 cut-off events. [2023-08-26 13:17:00,669 INFO L125 PetriNetUnfolderBase]: For 904060/904060 co-relation queries the response was YES. [2023-08-26 13:17:00,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216789 conditions, 19259 events. 12841/19259 cut-off events. For 904060/904060 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 125211 event pairs, 3156 based on Foata normal form. 8/19267 useless extension candidates. Maximal degree in co-relation 216611. Up to 18190 conditions per place. [2023-08-26 13:17:01,000 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1582 selfloop transitions, 198 changer transitions 1/1781 dead transitions. [2023-08-26 13:17:01,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 1781 transitions, 56221 flow [2023-08-26 13:17:01,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:17:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:17:01,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 676 transitions. [2023-08-26 13:17:01,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42355889724310775 [2023-08-26 13:17:01,002 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 676 transitions. [2023-08-26 13:17:01,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 676 transitions. [2023-08-26 13:17:01,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:17:01,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 676 transitions. [2023-08-26 13:17:01,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.57142857142857) internal successors, (676), 7 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:01,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:01,004 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:01,004 INFO L175 Difference]: Start difference. First operand has 442 places, 1756 transitions, 52368 flow. Second operand 7 states and 676 transitions. [2023-08-26 13:17:01,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 1781 transitions, 56221 flow [2023-08-26 13:17:15,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 1781 transitions, 55799 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-26 13:17:15,153 INFO L231 Difference]: Finished difference. Result has 443 places, 1759 transitions, 52461 flow [2023-08-26 13:17:15,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=51952, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52461, PETRI_PLACES=443, PETRI_TRANSITIONS=1759} [2023-08-26 13:17:15,154 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2023-08-26 13:17:15,154 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 1759 transitions, 52461 flow [2023-08-26 13:17:15,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:17:15,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:17:15,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:17:15,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-08-26 13:17:15,155 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:17:15,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:17:15,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1820181299, now seen corresponding path program 14 times [2023-08-26 13:17:15,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:17:15,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320250528] [2023-08-26 13:17:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:17:15,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:17:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:17:15,261 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 13:17:15,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:17:15,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320250528] [2023-08-26 13:17:15,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320250528] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:17:15,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:17:15,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:17:15,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143304736] [2023-08-26 13:17:15,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:17:15,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:17:15,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:17:15,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:17:15,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:17:15,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:17:15,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 1759 transitions, 52461 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:17:15,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:17:15,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:17:15,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:17:24,576 INFO L124 PetriNetUnfolderBase]: 12853/19281 cut-off events. [2023-08-26 13:17:24,576 INFO L125 PetriNetUnfolderBase]: For 905975/905975 co-relation queries the response was YES. [2023-08-26 13:17:24,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216874 conditions, 19281 events. 12853/19281 cut-off events. For 905975/905975 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 125544 event pairs, 3152 based on Foata normal form. 14/19295 useless extension candidates. Maximal degree in co-relation 216697. Up to 18176 conditions per place. [2023-08-26 13:17:24,899 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1585 selfloop transitions, 202 changer transitions 1/1788 dead transitions. [2023-08-26 13:17:24,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 1788 transitions, 56285 flow [2023-08-26 13:17:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:17:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:17:24,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 682 transitions. [2023-08-26 13:17:24,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273182957393484 [2023-08-26 13:17:24,900 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 682 transitions. [2023-08-26 13:17:24,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 682 transitions. [2023-08-26 13:17:24,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:17:24,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 682 transitions. [2023-08-26 13:17:24,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.42857142857143) internal successors, (682), 7 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:24,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:24,902 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:24,902 INFO L175 Difference]: Start difference. First operand has 443 places, 1759 transitions, 52461 flow. Second operand 7 states and 682 transitions. [2023-08-26 13:17:24,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 1788 transitions, 56285 flow [2023-08-26 13:17:38,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 1788 transitions, 56063 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-26 13:17:38,967 INFO L231 Difference]: Finished difference. Result has 446 places, 1760 transitions, 52693 flow [2023-08-26 13:17:38,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=52239, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52693, PETRI_PLACES=446, PETRI_TRANSITIONS=1760} [2023-08-26 13:17:38,968 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 405 predicate places. [2023-08-26 13:17:38,969 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 1760 transitions, 52693 flow [2023-08-26 13:17:38,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:17:38,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:17:38,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:17:38,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-08-26 13:17:38,969 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:17:38,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:17:38,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1592582047, now seen corresponding path program 15 times [2023-08-26 13:17:38,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:17:38,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226625040] [2023-08-26 13:17:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:17:38,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:17:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:17:39,080 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 13:17:39,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:17:39,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226625040] [2023-08-26 13:17:39,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226625040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:17:39,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:17:39,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:17:39,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909421362] [2023-08-26 13:17:39,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:17:39,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:17:39,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:17:39,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:17:39,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:17:39,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:17:39,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 1760 transitions, 52693 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:17:39,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:17:39,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:17:39,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:17:48,328 INFO L124 PetriNetUnfolderBase]: 12906/19360 cut-off events. [2023-08-26 13:17:48,329 INFO L125 PetriNetUnfolderBase]: For 914641/914641 co-relation queries the response was YES. [2023-08-26 13:17:48,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218047 conditions, 19360 events. 12906/19360 cut-off events. For 914641/914641 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 126073 event pairs, 3173 based on Foata normal form. 24/19384 useless extension candidates. Maximal degree in co-relation 217869. Up to 18221 conditions per place. [2023-08-26 13:17:48,791 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1588 selfloop transitions, 211 changer transitions 1/1800 dead transitions. [2023-08-26 13:17:48,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1800 transitions, 56890 flow [2023-08-26 13:17:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:17:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:17:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 684 transitions. [2023-08-26 13:17:48,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-26 13:17:48,792 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 684 transitions. [2023-08-26 13:17:48,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 684 transitions. [2023-08-26 13:17:48,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:17:48,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 684 transitions. [2023-08-26 13:17:48,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:48,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:48,795 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:48,795 INFO L175 Difference]: Start difference. First operand has 446 places, 1760 transitions, 52693 flow. Second operand 7 states and 684 transitions. [2023-08-26 13:17:48,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1800 transitions, 56890 flow [2023-08-26 13:18:03,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1800 transitions, 56458 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-26 13:18:03,403 INFO L231 Difference]: Finished difference. Result has 448 places, 1771 transitions, 53077 flow [2023-08-26 13:18:03,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=52273, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=53077, PETRI_PLACES=448, PETRI_TRANSITIONS=1771} [2023-08-26 13:18:03,404 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 407 predicate places. [2023-08-26 13:18:03,404 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 1771 transitions, 53077 flow [2023-08-26 13:18:03,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:18:03,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:18:03,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:18:03,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-08-26 13:18:03,405 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:18:03,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:18:03,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1034249261, now seen corresponding path program 23 times [2023-08-26 13:18:03,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:18:03,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797216784] [2023-08-26 13:18:03,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:18:03,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:18:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:18:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:18:03,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:18:03,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797216784] [2023-08-26 13:18:03,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797216784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:18:03,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227452201] [2023-08-26 13:18:03,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:18:03,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:18:03,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:18:03,515 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:18:03,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-26 13:18:03,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:18:03,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:18:03,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 13:18:03,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:18:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:18:03,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:18:03,833 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 13:18:03,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227452201] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 13:18:03,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 13:18:03,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 12 [2023-08-26 13:18:03,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483934650] [2023-08-26 13:18:03,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:18:03,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:18:03,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:18:03,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:18:03,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-26 13:18:03,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:18:03,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 1771 transitions, 53077 flow. Second operand has 6 states, 6 states have (on average 91.33333333333333) internal successors, (548), 6 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 13:18:03,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:18:03,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:18:03,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:18:13,253 INFO L124 PetriNetUnfolderBase]: 12958/19452 cut-off events. [2023-08-26 13:18:13,253 INFO L125 PetriNetUnfolderBase]: For 918744/918744 co-relation queries the response was YES. [2023-08-26 13:18:13,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219306 conditions, 19452 events. 12958/19452 cut-off events. For 918744/918744 co-relation queries the response was YES. Maximal size of possible extension queue 1146. Compared 127073 event pairs, 3043 based on Foata normal form. 18/19470 useless extension candidates. Maximal degree in co-relation 219126. Up to 18122 conditions per place. [2023-08-26 13:18:13,582 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1504 selfloop transitions, 361 changer transitions 0/1865 dead transitions. [2023-08-26 13:18:13,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1865 transitions, 58678 flow [2023-08-26 13:18:13,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 13:18:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 13:18:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 777 transitions. [2023-08-26 13:18:13,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42598684210526316 [2023-08-26 13:18:13,584 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 777 transitions. [2023-08-26 13:18:13,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 777 transitions. [2023-08-26 13:18:13,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:18:13,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 777 transitions. [2023-08-26 13:18:13,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.125) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:13,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:13,585 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:13,586 INFO L175 Difference]: Start difference. First operand has 448 places, 1771 transitions, 53077 flow. Second operand 8 states and 777 transitions. [2023-08-26 13:18:13,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1865 transitions, 58678 flow [2023-08-26 13:18:28,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1865 transitions, 58414 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-08-26 13:18:28,312 INFO L231 Difference]: Finished difference. Result has 457 places, 1815 transitions, 55110 flow [2023-08-26 13:18:28,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=52815, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=55110, PETRI_PLACES=457, PETRI_TRANSITIONS=1815} [2023-08-26 13:18:28,314 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2023-08-26 13:18:28,314 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1815 transitions, 55110 flow [2023-08-26 13:18:28,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 91.33333333333333) internal successors, (548), 6 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 13:18:28,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:18:28,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:18:28,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-26 13:18:28,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:18:28,519 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:18:28,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:18:28,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1207803025, now seen corresponding path program 24 times [2023-08-26 13:18:28,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:18:28,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769460114] [2023-08-26 13:18:28,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:18:28,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:18:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:18:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:18:28,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:18:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769460114] [2023-08-26 13:18:28,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769460114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:18:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572854169] [2023-08-26 13:18:28,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:18:28,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:18:28,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:18:28,660 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:18:28,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-26 13:18:28,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 13:18:28,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:18:28,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:18:28,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:18:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:18:28,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:18:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:18:28,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572854169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:18:28,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:18:28,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2023-08-26 13:18:28,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879172697] [2023-08-26 13:18:28,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:18:28,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:18:28,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:18:28,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:18:28,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:18:28,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:18:28,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1815 transitions, 55110 flow. Second operand has 16 states, 16 states have (on average 90.1875) internal successors, (1443), 16 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:28,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:18:28,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:18:28,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:18:39,476 INFO L124 PetriNetUnfolderBase]: 13251/19911 cut-off events. [2023-08-26 13:18:39,477 INFO L125 PetriNetUnfolderBase]: For 962206/962206 co-relation queries the response was YES. [2023-08-26 13:18:39,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226238 conditions, 19911 events. 13251/19911 cut-off events. For 962206/962206 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 130843 event pairs, 2903 based on Foata normal form. 36/19947 useless extension candidates. Maximal degree in co-relation 226053. Up to 17595 conditions per place. [2023-08-26 13:18:39,831 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1462 selfloop transitions, 568 changer transitions 1/2031 dead transitions. [2023-08-26 13:18:39,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 2031 transitions, 62953 flow [2023-08-26 13:18:39,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 13:18:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 13:18:39,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2304 transitions. [2023-08-26 13:18:39,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2023-08-26 13:18:39,833 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2304 transitions. [2023-08-26 13:18:39,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2304 transitions. [2023-08-26 13:18:39,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:18:39,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2304 transitions. [2023-08-26 13:18:39,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 96.0) internal successors, (2304), 24 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:39,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 228.0) internal successors, (5700), 25 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:39,840 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 228.0) internal successors, (5700), 25 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:39,840 INFO L175 Difference]: Start difference. First operand has 457 places, 1815 transitions, 55110 flow. Second operand 24 states and 2304 transitions. [2023-08-26 13:18:39,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 2031 transitions, 62953 flow [2023-08-26 13:18:55,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 2031 transitions, 62291 flow, removed 154 selfloop flow, removed 2 redundant places. [2023-08-26 13:18:55,466 INFO L231 Difference]: Finished difference. Result has 490 places, 1928 transitions, 59124 flow [2023-08-26 13:18:55,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=54437, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=59124, PETRI_PLACES=490, PETRI_TRANSITIONS=1928} [2023-08-26 13:18:55,467 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 449 predicate places. [2023-08-26 13:18:55,467 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 1928 transitions, 59124 flow [2023-08-26 13:18:55,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 90.1875) internal successors, (1443), 16 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:55,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:18:55,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:18:55,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-26 13:18:55,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-26 13:18:55,668 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:18:55,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:18:55,668 INFO L85 PathProgramCache]: Analyzing trace with hash -244073891, now seen corresponding path program 16 times [2023-08-26 13:18:55,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:18:55,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045220538] [2023-08-26 13:18:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:18:55,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:18:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:18:55,756 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 13:18:55,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:18:55,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045220538] [2023-08-26 13:18:55,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045220538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:18:55,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:18:55,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:18:55,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032160313] [2023-08-26 13:18:55,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:18:55,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:18:55,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:18:55,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:18:55,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:18:55,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:18:55,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 1928 transitions, 59124 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:18:55,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:18:55,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:18:55,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:19:06,571 INFO L124 PetriNetUnfolderBase]: 13291/20150 cut-off events. [2023-08-26 13:19:06,572 INFO L125 PetriNetUnfolderBase]: For 984193/984193 co-relation queries the response was YES. [2023-08-26 13:19:06,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230530 conditions, 20150 events. 13291/20150 cut-off events. For 984193/984193 co-relation queries the response was YES. Maximal size of possible extension queue 1202. Compared 134660 event pairs, 3145 based on Foata normal form. 84/20234 useless extension candidates. Maximal degree in co-relation 230334. Up to 18077 conditions per place. [2023-08-26 13:19:07,019 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 1711 selfloop transitions, 282 changer transitions 10/2003 dead transitions. [2023-08-26 13:19:07,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 2003 transitions, 63996 flow [2023-08-26 13:19:07,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:19:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:19:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 683 transitions. [2023-08-26 13:19:07,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42794486215538846 [2023-08-26 13:19:07,020 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 683 transitions. [2023-08-26 13:19:07,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 683 transitions. [2023-08-26 13:19:07,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:19:07,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 683 transitions. [2023-08-26 13:19:07,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.57142857142857) internal successors, (683), 7 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:19:07,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:19:07,022 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:19:07,022 INFO L175 Difference]: Start difference. First operand has 490 places, 1928 transitions, 59124 flow. Second operand 7 states and 683 transitions. [2023-08-26 13:19:07,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 2003 transitions, 63996 flow [2023-08-26 13:19:24,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 2003 transitions, 63499 flow, removed 245 selfloop flow, removed 1 redundant places. [2023-08-26 13:19:24,263 INFO L231 Difference]: Finished difference. Result has 498 places, 1932 transitions, 59422 flow [2023-08-26 13:19:24,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=58627, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1928, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=59422, PETRI_PLACES=498, PETRI_TRANSITIONS=1932} [2023-08-26 13:19:24,265 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2023-08-26 13:19:24,266 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 1932 transitions, 59422 flow [2023-08-26 13:19:24,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:19:24,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:19:24,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:19:24,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-08-26 13:19:24,266 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:19:24,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:19:24,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1728000219, now seen corresponding path program 17 times [2023-08-26 13:19:24,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:19:24,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538644568] [2023-08-26 13:19:24,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:19:24,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:19:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:19:24,385 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 13:19:24,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:19:24,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538644568] [2023-08-26 13:19:24,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538644568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:19:24,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:19:24,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:19:24,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188853990] [2023-08-26 13:19:24,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:19:24,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:19:24,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:19:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:19:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:19:24,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:19:24,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 1932 transitions, 59422 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:19:24,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:19:24,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:19:24,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:19:34,997 INFO L124 PetriNetUnfolderBase]: 13272/20108 cut-off events. [2023-08-26 13:19:34,997 INFO L125 PetriNetUnfolderBase]: For 1003960/1003960 co-relation queries the response was YES. [2023-08-26 13:19:35,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232130 conditions, 20108 events. 13272/20108 cut-off events. For 1003960/1003960 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 134225 event pairs, 3341 based on Foata normal form. 8/20116 useless extension candidates. Maximal degree in co-relation 231930. Up to 18984 conditions per place. [2023-08-26 13:19:35,579 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1715 selfloop transitions, 242 changer transitions 1/1958 dead transitions. [2023-08-26 13:19:35,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 1958 transitions, 63665 flow [2023-08-26 13:19:35,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:19:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:19:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 674 transitions. [2023-08-26 13:19:35,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223057644110276 [2023-08-26 13:19:35,580 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 674 transitions. [2023-08-26 13:19:35,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 674 transitions. [2023-08-26 13:19:35,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:19:35,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 674 transitions. [2023-08-26 13:19:35,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.28571428571429) internal successors, (674), 7 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:19:35,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:19:35,582 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:19:35,582 INFO L175 Difference]: Start difference. First operand has 498 places, 1932 transitions, 59422 flow. Second operand 7 states and 674 transitions. [2023-08-26 13:19:35,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 1958 transitions, 63665 flow [2023-08-26 13:19:53,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1958 transitions, 63049 flow, removed 58 selfloop flow, removed 5 redundant places. [2023-08-26 13:19:53,517 INFO L231 Difference]: Finished difference. Result has 498 places, 1935 transitions, 59421 flow [2023-08-26 13:19:53,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=58812, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=59421, PETRI_PLACES=498, PETRI_TRANSITIONS=1935} [2023-08-26 13:19:53,519 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2023-08-26 13:19:53,519 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 1935 transitions, 59421 flow [2023-08-26 13:19:53,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:19:53,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:19:53,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:19:53,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-08-26 13:19:53,519 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:19:53,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:19:53,520 INFO L85 PathProgramCache]: Analyzing trace with hash -973911471, now seen corresponding path program 18 times [2023-08-26 13:19:53,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:19:53,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203245148] [2023-08-26 13:19:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:19:53,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:19:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:19:53,626 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 13:19:53,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:19:53,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203245148] [2023-08-26 13:19:53,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203245148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:19:53,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:19:53,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:19:53,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003794498] [2023-08-26 13:19:53,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:19:53,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:19:53,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:19:53,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:19:53,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:19:53,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:19:53,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 1935 transitions, 59421 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:19:53,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:19:53,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:19:53,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:20:04,070 INFO L124 PetriNetUnfolderBase]: 13150/19870 cut-off events. [2023-08-26 13:20:04,070 INFO L125 PetriNetUnfolderBase]: For 989776/989776 co-relation queries the response was YES. [2023-08-26 13:20:04,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229293 conditions, 19870 events. 13150/19870 cut-off events. For 989776/989776 co-relation queries the response was YES. Maximal size of possible extension queue 1187. Compared 131721 event pairs, 3087 based on Foata normal form. 98/19968 useless extension candidates. Maximal degree in co-relation 229095. Up to 18203 conditions per place. [2023-08-26 13:20:04,447 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 1695 selfloop transitions, 296 changer transitions 1/1992 dead transitions. [2023-08-26 13:20:04,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 1992 transitions, 63977 flow [2023-08-26 13:20:04,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:20:04,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:20:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 683 transitions. [2023-08-26 13:20:04,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42794486215538846 [2023-08-26 13:20:04,449 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 683 transitions. [2023-08-26 13:20:04,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 683 transitions. [2023-08-26 13:20:04,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:20:04,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 683 transitions. [2023-08-26 13:20:04,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.57142857142857) internal successors, (683), 7 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:20:04,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:20:04,450 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:20:04,450 INFO L175 Difference]: Start difference. First operand has 498 places, 1935 transitions, 59421 flow. Second operand 7 states and 683 transitions. [2023-08-26 13:20:04,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 1992 transitions, 63977 flow [2023-08-26 13:20:21,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1992 transitions, 63440 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-08-26 13:20:21,672 INFO L231 Difference]: Finished difference. Result has 499 places, 1941 transitions, 59691 flow [2023-08-26 13:20:21,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=58894, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=59691, PETRI_PLACES=499, PETRI_TRANSITIONS=1941} [2023-08-26 13:20:21,674 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2023-08-26 13:20:21,674 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1941 transitions, 59691 flow [2023-08-26 13:20:21,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:20:21,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:20:21,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:20:21,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2023-08-26 13:20:21,675 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:20:21,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:20:21,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2051284075, now seen corresponding path program 19 times [2023-08-26 13:20:21,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:20:21,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234165104] [2023-08-26 13:20:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:20:21,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:20:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:20:21,788 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 13:20:21,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:20:21,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234165104] [2023-08-26 13:20:21,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234165104] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:20:21,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:20:21,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:20:21,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838131464] [2023-08-26 13:20:21,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:20:21,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:20:21,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:20:21,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:20:21,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:20:21,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:20:21,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1941 transitions, 59691 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:20:21,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:20:21,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:20:21,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:20:33,379 INFO L124 PetriNetUnfolderBase]: 13150/19862 cut-off events. [2023-08-26 13:20:33,379 INFO L125 PetriNetUnfolderBase]: For 992403/992403 co-relation queries the response was YES. [2023-08-26 13:20:33,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229778 conditions, 19862 events. 13150/19862 cut-off events. For 992403/992403 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 131618 event pairs, 3236 based on Foata normal form. 10/19872 useless extension candidates. Maximal degree in co-relation 229580. Up to 18720 conditions per place. [2023-08-26 13:20:33,748 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 1728 selfloop transitions, 247 changer transitions 1/1976 dead transitions. [2023-08-26 13:20:33,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 1976 transitions, 63996 flow [2023-08-26 13:20:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:20:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:20:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 672 transitions. [2023-08-26 13:20:33,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2023-08-26 13:20:33,750 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 672 transitions. [2023-08-26 13:20:33,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 672 transitions. [2023-08-26 13:20:33,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:20:33,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 672 transitions. [2023-08-26 13:20:33,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:20:33,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:20:33,753 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:20:33,753 INFO L175 Difference]: Start difference. First operand has 499 places, 1941 transitions, 59691 flow. Second operand 7 states and 672 transitions. [2023-08-26 13:20:33,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 1976 transitions, 63996 flow [2023-08-26 13:20:50,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1976 transitions, 63356 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-08-26 13:20:50,960 INFO L231 Difference]: Finished difference. Result has 499 places, 1946 transitions, 59691 flow [2023-08-26 13:20:50,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=58919, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1937, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=59691, PETRI_PLACES=499, PETRI_TRANSITIONS=1946} [2023-08-26 13:20:50,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2023-08-26 13:20:50,961 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1946 transitions, 59691 flow [2023-08-26 13:20:50,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:20:50,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:20:50,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:20:50,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-08-26 13:20:50,962 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:20:50,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:20:50,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1965309905, now seen corresponding path program 20 times [2023-08-26 13:20:50,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:20:50,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141310634] [2023-08-26 13:20:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:20:50,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:20:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:20:51,104 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 13:20:51,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:20:51,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141310634] [2023-08-26 13:20:51,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141310634] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:20:51,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:20:51,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:20:51,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45619388] [2023-08-26 13:20:51,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:20:51,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:20:51,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:20:51,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:20:51,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:20:51,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:20:51,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1946 transitions, 59691 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:20:51,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:20:51,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:20:51,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:21:01,587 INFO L124 PetriNetUnfolderBase]: 13212/19940 cut-off events. [2023-08-26 13:21:01,587 INFO L125 PetriNetUnfolderBase]: For 993024/993024 co-relation queries the response was YES. [2023-08-26 13:21:01,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230477 conditions, 19940 events. 13212/19940 cut-off events. For 993024/993024 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 131932 event pairs, 3214 based on Foata normal form. 28/19968 useless extension candidates. Maximal degree in co-relation 230280. Up to 18531 conditions per place. [2023-08-26 13:21:02,212 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1721 selfloop transitions, 270 changer transitions 1/1992 dead transitions. [2023-08-26 13:21:02,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 1992 transitions, 64394 flow [2023-08-26 13:21:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:21:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:21:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 682 transitions. [2023-08-26 13:21:02,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273182957393484 [2023-08-26 13:21:02,214 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 682 transitions. [2023-08-26 13:21:02,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 682 transitions. [2023-08-26 13:21:02,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:21:02,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 682 transitions. [2023-08-26 13:21:02,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.42857142857143) internal successors, (682), 7 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:21:02,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:21:02,216 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:21:02,216 INFO L175 Difference]: Start difference. First operand has 499 places, 1946 transitions, 59691 flow. Second operand 7 states and 682 transitions. [2023-08-26 13:21:02,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 1992 transitions, 64394 flow [2023-08-26 13:21:19,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 1992 transitions, 64045 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-26 13:21:20,001 INFO L231 Difference]: Finished difference. Result has 503 places, 1958 transitions, 60426 flow [2023-08-26 13:21:20,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=59280, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=60426, PETRI_PLACES=503, PETRI_TRANSITIONS=1958} [2023-08-26 13:21:20,002 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 462 predicate places. [2023-08-26 13:21:20,003 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 1958 transitions, 60426 flow [2023-08-26 13:21:20,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:21:20,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:21:20,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:21:20,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2023-08-26 13:21:20,003 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:21:20,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:21:20,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1030338693, now seen corresponding path program 25 times [2023-08-26 13:21:20,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:21:20,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094788084] [2023-08-26 13:21:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:21:20,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:21:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:21:20,097 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 13:21:20,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:21:20,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094788084] [2023-08-26 13:21:20,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094788084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:21:20,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:21:20,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:21:20,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657892186] [2023-08-26 13:21:20,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:21:20,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:21:20,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:21:20,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:21:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:21:20,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:21:20,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 1958 transitions, 60426 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:21:20,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:21:20,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:21:20,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:21:30,667 INFO L124 PetriNetUnfolderBase]: 13155/19799 cut-off events. [2023-08-26 13:21:30,668 INFO L125 PetriNetUnfolderBase]: For 1008187/1008187 co-relation queries the response was YES. [2023-08-26 13:21:30,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229930 conditions, 19799 events. 13155/19799 cut-off events. For 1008187/1008187 co-relation queries the response was YES. Maximal size of possible extension queue 1183. Compared 130443 event pairs, 2976 based on Foata normal form. 48/19847 useless extension candidates. Maximal degree in co-relation 229731. Up to 17547 conditions per place. [2023-08-26 13:21:31,049 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1641 selfloop transitions, 397 changer transitions 1/2039 dead transitions. [2023-08-26 13:21:31,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 2039 transitions, 65831 flow [2023-08-26 13:21:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:21:31,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:21:31,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 687 transitions. [2023-08-26 13:21:31,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43045112781954886 [2023-08-26 13:21:31,050 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 687 transitions. [2023-08-26 13:21:31,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 687 transitions. [2023-08-26 13:21:31,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:21:31,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 687 transitions. [2023-08-26 13:21:31,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.14285714285714) internal successors, (687), 7 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:21:31,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:21:31,052 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:21:31,052 INFO L175 Difference]: Start difference. First operand has 503 places, 1958 transitions, 60426 flow. Second operand 7 states and 687 transitions. [2023-08-26 13:21:31,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 2039 transitions, 65831 flow [2023-08-26 13:21:48,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 2039 transitions, 65413 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-26 13:21:48,510 INFO L231 Difference]: Finished difference. Result has 507 places, 1958 transitions, 60833 flow [2023-08-26 13:21:48,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=60008, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=60833, PETRI_PLACES=507, PETRI_TRANSITIONS=1958} [2023-08-26 13:21:48,512 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 466 predicate places. [2023-08-26 13:21:48,512 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 1958 transitions, 60833 flow [2023-08-26 13:21:48,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:21:48,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:21:48,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:21:48,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2023-08-26 13:21:48,513 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:21:48,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:21:48,513 INFO L85 PathProgramCache]: Analyzing trace with hash 166190569, now seen corresponding path program 26 times [2023-08-26 13:21:48,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:21:48,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214874216] [2023-08-26 13:21:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:21:48,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:21:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:21:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:21:48,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:21:48,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214874216] [2023-08-26 13:21:48,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214874216] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:21:48,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446068206] [2023-08-26 13:21:48,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:21:48,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:21:48,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:21:48,633 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:21:48,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-26 13:21:48,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:21:48,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:21:48,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:21:48,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:21:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:21:48,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:21:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:21:49,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446068206] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:21:49,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:21:49,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-08-26 13:21:49,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994834562] [2023-08-26 13:21:49,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:21:49,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:21:49,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:21:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:21:49,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:21:49,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:21:49,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 1958 transitions, 60833 flow. Second operand has 16 states, 16 states have (on average 90.125) internal successors, (1442), 16 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:21:49,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:21:49,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:21:49,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:22:01,686 INFO L124 PetriNetUnfolderBase]: 15063/22507 cut-off events. [2023-08-26 13:22:01,686 INFO L125 PetriNetUnfolderBase]: For 1125853/1125853 co-relation queries the response was YES. [2023-08-26 13:22:02,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259474 conditions, 22507 events. 15063/22507 cut-off events. For 1125853/1125853 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 149107 event pairs, 1679 based on Foata normal form. 20/22527 useless extension candidates. Maximal degree in co-relation 259274. Up to 9419 conditions per place. [2023-08-26 13:22:02,185 INFO L140 encePairwiseOnDemand]: 218/228 looper letters, 1125 selfloop transitions, 1317 changer transitions 1/2443 dead transitions. [2023-08-26 13:22:02,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 2443 transitions, 75988 flow [2023-08-26 13:22:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 13:22:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 13:22:02,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2127 transitions. [2023-08-26 13:22:02,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42404306220095694 [2023-08-26 13:22:02,188 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2127 transitions. [2023-08-26 13:22:02,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2127 transitions. [2023-08-26 13:22:02,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:22:02,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2127 transitions. [2023-08-26 13:22:02,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 96.68181818181819) internal successors, (2127), 22 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:02,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 228.0) internal successors, (5244), 23 states have internal predecessors, (5244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:02,192 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 228.0) internal successors, (5244), 23 states have internal predecessors, (5244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:02,192 INFO L175 Difference]: Start difference. First operand has 507 places, 1958 transitions, 60833 flow. Second operand 22 states and 2127 transitions. [2023-08-26 13:22:02,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 2443 transitions, 75988 flow [2023-08-26 13:22:23,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 2443 transitions, 75072 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-08-26 13:22:23,627 INFO L231 Difference]: Finished difference. Result has 536 places, 2178 transitions, 71125 flow [2023-08-26 13:22:23,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=60048, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=742, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=71125, PETRI_PLACES=536, PETRI_TRANSITIONS=2178} [2023-08-26 13:22:23,629 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 495 predicate places. [2023-08-26 13:22:23,629 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 2178 transitions, 71125 flow [2023-08-26 13:22:23,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 90.125) internal successors, (1442), 16 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:23,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:22:23,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:22:23,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-26 13:22:23,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:22:23,830 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:22:23,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:22:23,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1571598953, now seen corresponding path program 8 times [2023-08-26 13:22:23,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:22:23,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835065601] [2023-08-26 13:22:23,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:22:23,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:22:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:22:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:22:23,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:22:23,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835065601] [2023-08-26 13:22:23,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835065601] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:22:23,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651718215] [2023-08-26 13:22:23,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:22:23,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:22:23,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:22:23,953 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:22:23,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-26 13:22:24,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:22:24,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:22:24,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-26 13:22:24,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:22:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:22:24,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:22:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:22:24,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651718215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:22:24,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:22:24,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-26 13:22:24,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451701193] [2023-08-26 13:22:24,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:22:24,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:22:24,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:22:24,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:22:24,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:22:24,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 228 [2023-08-26 13:22:24,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 2178 transitions, 71125 flow. Second operand has 18 states, 18 states have (on average 85.5) internal successors, (1539), 18 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:24,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:22:24,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 228 [2023-08-26 13:22:24,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:22:39,154 INFO L124 PetriNetUnfolderBase]: 16490/24608 cut-off events. [2023-08-26 13:22:39,154 INFO L125 PetriNetUnfolderBase]: For 1368370/1368370 co-relation queries the response was YES. [2023-08-26 13:22:40,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296152 conditions, 24608 events. 16490/24608 cut-off events. For 1368370/1368370 co-relation queries the response was YES. Maximal size of possible extension queue 1439. Compared 164572 event pairs, 1404 based on Foata normal form. 8/24616 useless extension candidates. Maximal degree in co-relation 295941. Up to 11235 conditions per place. [2023-08-26 13:22:40,330 INFO L140 encePairwiseOnDemand]: 218/228 looper letters, 1653 selfloop transitions, 782 changer transitions 1/2436 dead transitions. [2023-08-26 13:22:40,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 2436 transitions, 81578 flow [2023-08-26 13:22:40,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 13:22:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 13:22:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1476 transitions. [2023-08-26 13:22:40,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40460526315789475 [2023-08-26 13:22:40,332 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1476 transitions. [2023-08-26 13:22:40,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1476 transitions. [2023-08-26 13:22:40,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:22:40,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1476 transitions. [2023-08-26 13:22:40,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 92.25) internal successors, (1476), 16 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:40,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 228.0) internal successors, (3876), 17 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:40,335 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 228.0) internal successors, (3876), 17 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:40,335 INFO L175 Difference]: Start difference. First operand has 536 places, 2178 transitions, 71125 flow. Second operand 16 states and 1476 transitions. [2023-08-26 13:22:40,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 2436 transitions, 81578 flow [2023-08-26 13:23:08,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 2436 transitions, 80292 flow, removed 372 selfloop flow, removed 7 redundant places. [2023-08-26 13:23:08,901 INFO L231 Difference]: Finished difference. Result has 552 places, 2247 transitions, 74895 flow [2023-08-26 13:23:08,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=69979, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=713, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=74895, PETRI_PLACES=552, PETRI_TRANSITIONS=2247} [2023-08-26 13:23:08,903 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 511 predicate places. [2023-08-26 13:23:08,903 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 2247 transitions, 74895 flow [2023-08-26 13:23:08,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 85.5) internal successors, (1539), 18 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:08,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:08,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:08,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-26 13:23:09,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:09,104 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:09,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:09,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1502048693, now seen corresponding path program 27 times [2023-08-26 13:23:09,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:09,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249317423] [2023-08-26 13:23:09,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:09,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:09,194 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 13:23:09,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:09,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249317423] [2023-08-26 13:23:09,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249317423] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:09,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:09,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:23:09,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79871648] [2023-08-26 13:23:09,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:09,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:23:09,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:09,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:23:09,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:23:09,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 13:23:09,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 2247 transitions, 74895 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 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 13:23:09,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:09,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 13:23:09,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:24,729 INFO L124 PetriNetUnfolderBase]: 16464/24572 cut-off events. [2023-08-26 13:23:24,729 INFO L125 PetriNetUnfolderBase]: For 1402428/1402428 co-relation queries the response was YES. [2023-08-26 13:23:25,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298097 conditions, 24572 events. 16464/24572 cut-off events. For 1402428/1402428 co-relation queries the response was YES. Maximal size of possible extension queue 1437. Compared 164668 event pairs, 3889 based on Foata normal form. 24/24596 useless extension candidates. Maximal degree in co-relation 297880. Up to 23142 conditions per place. [2023-08-26 13:23:25,751 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1982 selfloop transitions, 299 changer transitions 1/2282 dead transitions. [2023-08-26 13:23:25,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 2282 transitions, 79961 flow [2023-08-26 13:23:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:23:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:23:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 684 transitions. [2023-08-26 13:23:25,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-26 13:23:25,752 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 684 transitions. [2023-08-26 13:23:25,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 684 transitions. [2023-08-26 13:23:25,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:25,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 684 transitions. [2023-08-26 13:23:25,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:25,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:25,754 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:25,755 INFO L175 Difference]: Start difference. First operand has 552 places, 2247 transitions, 74895 flow. Second operand 7 states and 684 transitions. [2023-08-26 13:23:25,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 2282 transitions, 79961 flow Received shutdown request... [2023-08-26 13:23:29,942 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12ASSERT_VIOLATIONASSERT (15 of 16 remaining) [2023-08-26 13:23:29,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2023-08-26 13:23:29,942 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-26 13:23:29,943 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-08-26 13:23:29,943 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-08-26 13:23:29,943 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-08-26 13:23:29,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-08-26 13:23:29,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-08-26 13:23:29,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-08-26 13:23:29,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2023-08-26 13:23:29,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-08-26 13:23:29,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-08-26 13:23:29,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-08-26 13:23:29,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-08-26 13:23:29,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-08-26 13:23:29,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 16 remaining) [2023-08-26 13:23:29,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 16 remaining) [2023-08-26 13:23:29,944 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 16 remaining) [2023-08-26 13:23:29,944 INFO L445 BasicCegarLoop]: Path program histogram: [27, 20, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:29,947 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 13:23:29,947 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 13:23:29,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:23:29 BasicIcfg [2023-08-26 13:23:29,949 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 13:23:29,949 INFO L158 Benchmark]: Toolchain (without parser) took 794989.43ms. Allocated memory was 390.1MB in the beginning and 14.3GB in the end (delta: 13.9GB). Free memory was 366.2MB in the beginning and 8.9GB in the end (delta: -8.6GB). Peak memory consumption was 6.1GB. Max. memory is 16.0GB. [2023-08-26 13:23:29,949 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 390.1MB. Free memory was 366.1MB in the beginning and 366.0MB in the end (delta: 74.7kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:23:29,950 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.75ms. Allocated memory is still 390.1MB. Free memory was 366.2MB in the beginning and 355.3MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 13:23:29,950 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.19ms. Allocated memory is still 390.1MB. Free memory was 355.3MB in the beginning and 353.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:23:29,950 INFO L158 Benchmark]: Boogie Preprocessor took 34.58ms. Allocated memory is still 390.1MB. Free memory was 353.5MB in the beginning and 352.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:23:29,950 INFO L158 Benchmark]: RCFGBuilder took 406.79ms. Allocated memory is still 390.1MB. Free memory was 352.0MB in the beginning and 336.9MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 13:23:29,951 INFO L158 Benchmark]: TraceAbstraction took 794312.79ms. Allocated memory was 390.1MB in the beginning and 14.3GB in the end (delta: 13.9GB). Free memory was 336.4MB in the beginning and 8.9GB in the end (delta: -8.6GB). Peak memory consumption was 6.0GB. Max. memory is 16.0GB. [2023-08-26 13:23:29,951 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 390.1MB. Free memory was 366.1MB in the beginning and 366.0MB in the end (delta: 74.7kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 185.75ms. Allocated memory is still 390.1MB. Free memory was 366.2MB in the beginning and 355.3MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 44.19ms. Allocated memory is still 390.1MB. Free memory was 355.3MB in the beginning and 353.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.58ms. Allocated memory is still 390.1MB. Free memory was 353.5MB in the beginning and 352.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 406.79ms. Allocated memory is still 390.1MB. Free memory was 352.0MB in the beginning and 336.9MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 794312.79ms. Allocated memory was 390.1MB in the beginning and 14.3GB in the end (delta: 13.9GB). Free memory was 336.4MB in the beginning and 8.9GB in the end (delta: -8.6GB). Peak memory consumption was 6.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 110 PlacesBefore, 41 PlacesAfterwards, 107 TransitionsBefore, 34 TransitionsAfterwards, 1914 CoEnabledTransitionPairs, 6 FixpointIterations, 48 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 107 TotalNumberOfCompositions, 1930 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1930, independent: 1930, independent conditional: 0, independent unconditional: 1930, 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: 975, independent: 975, independent conditional: 0, independent unconditional: 975, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1930, independent: 955, independent conditional: 0, independent unconditional: 955, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 975, unknown conditional: 0, unknown unconditional: 975] , Statistics on independence cache: Total cache size (in pairs): 66, Positive cache size: 66, Positive conditional cache size: 0, Positive unconditional cache size: 66, 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 executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 148 locations, 16 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: 794.2s, OverallIterations: 63, TraceHistogramMax: 1, PathProgramHistogramMax: 27, EmptinessCheckTime: 0.0s, AutomataDifference: 766.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2964 SdHoareTripleChecker+Valid, 13.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2964 mSDsluCounter, 1582 SdHoareTripleChecker+Invalid, 11.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1124 mSDsCounter, 163 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18679 IncrementalHoareTripleChecker+Invalid, 18842 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 163 mSolverCounterUnsat, 458 mSDtfsCounter, 18679 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1404 GetRequests, 791 SyntacticMatches, 27 SemanticMatches, 586 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74895occurred in iteration=62, InterpolantAutomatonStates: 567, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 15.6s InterpolantComputationTime, 1590 NumberOfCodeBlocks, 1590 NumberOfCodeBlocksAsserted, 105 NumberOfCheckSat, 1923 ConstructedInterpolants, 0 QuantifiedInterpolants, 11223 SizeOfPredicates, 112 NumberOfNonLiveVariables, 3938 ConjunctsInSsa, 302 ConjunctsInUnsatCore, 107 InterpolantComputations, 51 PerfectInterpolantSequences, 43/99 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 [2023-08-26 13:23:29,959 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown