/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --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/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:32:07,143 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:32:07,206 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 18:32:07,210 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:32:07,210 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:32:07,233 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:32:07,234 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:32:07,234 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:32:07,234 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:32:07,241 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:32:07,241 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:32:07,241 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:32:07,241 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:32:07,242 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:32:07,242 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:32:07,242 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:32:07,243 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:32:07,243 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:32:07,243 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:32:07,243 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:32:07,243 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:32:07,244 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:32:07,244 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:32:07,244 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:32:07,245 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:32:07,245 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:32:07,245 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:32:07,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:32:07,245 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:32:07,245 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:32:07,246 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:32:07,246 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:32:07,246 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:32:07,246 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:32:07,247 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:32:07,247 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:32:07,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:32:07,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:32:07,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:32:07,490 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:32:07,490 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:32:07,491 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-08-26 18:32:08,434 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:32:08,641 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:32:08,641 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-08-26 18:32:08,655 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afa4e67fc/d1ee31c9cc184e90b702ffd1f7546453/FLAGa460a21cb [2023-08-26 18:32:08,664 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afa4e67fc/d1ee31c9cc184e90b702ffd1f7546453 [2023-08-26 18:32:08,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:32:08,666 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:32:08,667 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:32:08,667 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:32:08,668 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:32:08,669 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:32:08" (1/1) ... [2023-08-26 18:32:08,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45684e19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:32:08, skipping insertion in model container [2023-08-26 18:32:08,669 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:32:08" (1/1) ... [2023-08-26 18:32:08,704 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:32:09,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:32:09,121 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:32:09,141 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 18:32:09,143 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [246] [2023-08-26 18:32:09,156 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [1102] [2023-08-26 18:32:09,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:32:09,234 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:32:09,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:32:09 WrapperNode [2023-08-26 18:32:09,234 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:32:09,235 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:32:09,235 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:32:09,235 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:32:09,239 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:32:09" (1/1) ... [2023-08-26 18:32:09,264 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:32:09" (1/1) ... [2023-08-26 18:32:09,280 INFO L138 Inliner]: procedures = 364, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2023-08-26 18:32:09,280 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:32:09,280 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:32:09,281 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:32:09,281 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:32:09,286 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:32:09" (1/1) ... [2023-08-26 18:32:09,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:32:09" (1/1) ... [2023-08-26 18:32:09,293 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:32:09" (1/1) ... [2023-08-26 18:32:09,293 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:32:09" (1/1) ... [2023-08-26 18:32:09,297 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:32:09" (1/1) ... [2023-08-26 18:32:09,299 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:32:09" (1/1) ... [2023-08-26 18:32:09,300 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:32:09" (1/1) ... [2023-08-26 18:32:09,300 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:32:09" (1/1) ... [2023-08-26 18:32:09,302 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:32:09,302 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:32:09,303 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:32:09,303 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:32:09,303 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:32:09" (1/1) ... [2023-08-26 18:32:09,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:32:09,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:32:09,326 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 18:32:09,332 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 18:32:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:32:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:32:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:32:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:32:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 18:32:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:32:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2023-08-26 18:32:09,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2023-08-26 18:32:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:32:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:32:09,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:32:09,356 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 18:32:09,458 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:32:09,460 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:32:09,593 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:32:09,597 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:32:09,597 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 18:32:09,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:32:09 BoogieIcfgContainer [2023-08-26 18:32:09,599 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:32:09,600 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:32:09,600 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:32:09,602 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:32:09,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:32:08" (1/3) ... [2023-08-26 18:32:09,602 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3880af2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:32:09, skipping insertion in model container [2023-08-26 18:32:09,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:32:09" (2/3) ... [2023-08-26 18:32:09,603 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3880af2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:32:09, skipping insertion in model container [2023-08-26 18:32:09,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:32:09" (3/3) ... [2023-08-26 18:32:09,604 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2023-08-26 18:32:09,615 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:32:09,616 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 18:32:09,616 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:32:09,664 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 18:32:09,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 94 transitions, 196 flow [2023-08-26 18:32:09,710 INFO L124 PetriNetUnfolderBase]: 8/93 cut-off events. [2023-08-26 18:32:09,710 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:32:09,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 93 events. 8/93 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 108 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-08-26 18:32:09,717 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 94 transitions, 196 flow [2023-08-26 18:32:09,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 83 transitions, 172 flow [2023-08-26 18:32:09,722 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:32:09,727 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 83 transitions, 172 flow [2023-08-26 18:32:09,729 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 83 transitions, 172 flow [2023-08-26 18:32:09,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 83 transitions, 172 flow [2023-08-26 18:32:09,742 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2023-08-26 18:32:09,742 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:32:09,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 83 events. 6/83 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 95 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-08-26 18:32:09,743 INFO L119 LiptonReduction]: Number of co-enabled transitions 798 [2023-08-26 18:32:11,295 INFO L134 LiptonReduction]: Checked pairs total: 1058 [2023-08-26 18:32:11,295 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-26 18:32:11,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:32:11,308 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;@7d48c49d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:32:11,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-26 18:32:11,311 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:32:11,312 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 18:32:11,312 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:32:11,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:11,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:32:11,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:32:11,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:11,317 INFO L85 PathProgramCache]: Analyzing trace with hash 350, now seen corresponding path program 1 times [2023-08-26 18:32:11,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:11,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609011677] [2023-08-26 18:32:11,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:11,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:11,399 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 18:32:11,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:11,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609011677] [2023-08-26 18:32:11,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609011677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:32:11,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:32:11,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:32:11,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173258248] [2023-08-26 18:32:11,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:32:11,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:32:11,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:11,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:32:11,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:32:11,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 168 [2023-08-26 18:32:11,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 44 flow. Second operand has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:11,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:11,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 168 [2023-08-26 18:32:11,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:32:11,477 INFO L124 PetriNetUnfolderBase]: 37/78 cut-off events. [2023-08-26 18:32:11,478 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:32:11,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 78 events. 37/78 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 221 event pairs, 25 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 146. Up to 77 conditions per place. [2023-08-26 18:32:11,480 INFO L140 encePairwiseOnDemand]: 166/168 looper letters, 16 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-26 18:32:11,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 17 transitions, 72 flow [2023-08-26 18:32:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:32:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:32:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2023-08-26 18:32:11,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-08-26 18:32:11,488 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2023-08-26 18:32:11,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2023-08-26 18:32:11,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:32:11,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2023-08-26 18:32:11,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:11,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:11,495 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:11,496 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 44 flow. Second operand 2 states and 184 transitions. [2023-08-26 18:32:11,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 17 transitions, 72 flow [2023-08-26 18:32:11,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 17 transitions, 68 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:32:11,499 INFO L231 Difference]: Finished difference. Result has 18 places, 17 transitions, 36 flow [2023-08-26 18:32:11,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=18, PETRI_TRANSITIONS=17} [2023-08-26 18:32:11,502 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -3 predicate places. [2023-08-26 18:32:11,502 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 17 transitions, 36 flow [2023-08-26 18:32:11,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:11,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:11,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 18:32:11,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:32:11,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:32:11,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:11,503 INFO L85 PathProgramCache]: Analyzing trace with hash 10611601, now seen corresponding path program 1 times [2023-08-26 18:32:11,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:11,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016786326] [2023-08-26 18:32:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:11,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:11,593 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 18:32:11,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:11,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016786326] [2023-08-26 18:32:11,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016786326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:32:11,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:32:11,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:32:11,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403996963] [2023-08-26 18:32:11,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:32:11,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:32:11,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:11,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:32:11,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:32:11,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 168 [2023-08-26 18:32:11,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:11,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:11,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 168 [2023-08-26 18:32:11,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:32:11,651 INFO L124 PetriNetUnfolderBase]: 49/112 cut-off events. [2023-08-26 18:32:11,651 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:32:11,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 112 events. 49/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 379 event pairs, 25 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 213. Up to 77 conditions per place. [2023-08-26 18:32:11,652 INFO L140 encePairwiseOnDemand]: 163/168 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-26 18:32:11,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 100 flow [2023-08-26 18:32:11,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:32:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:32:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2023-08-26 18:32:11,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2023-08-26 18:32:11,656 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2023-08-26 18:32:11,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2023-08-26 18:32:11,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:32:11,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2023-08-26 18:32:11,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:11,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 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 18:32:11,659 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 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 18:32:11,659 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 36 flow. Second operand 3 states and 255 transitions. [2023-08-26 18:32:11,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 100 flow [2023-08-26 18:32:11,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 25 transitions, 100 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:32:11,660 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 52 flow [2023-08-26 18:32:11,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-08-26 18:32:11,660 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 0 predicate places. [2023-08-26 18:32:11,660 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 52 flow [2023-08-26 18:32:11,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:11,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:11,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:32:11,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:32:11,661 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:32:11,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:11,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1697637123, now seen corresponding path program 1 times [2023-08-26 18:32:11,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:11,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960116141] [2023-08-26 18:32:11,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:11,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:11,753 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 18:32:11,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960116141] [2023-08-26 18:32:11,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960116141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:32:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106234223] [2023-08-26 18:32:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:11,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:32:11,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:32:11,756 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 18:32:11,786 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 18:32:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:11,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 18:32:11,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:32:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:32:11,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:32:11,861 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 18:32:11,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106234223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:32:11,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:32:11,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 18:32:11,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753341710] [2023-08-26 18:32:11,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:32:11,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:32:11,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:11,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:32:11,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:32:11,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 168 [2023-08-26 18:32:11,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:11,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:11,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 168 [2023-08-26 18:32:11,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:32:11,982 INFO L124 PetriNetUnfolderBase]: 79/184 cut-off events. [2023-08-26 18:32:11,982 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-26 18:32:11,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 184 events. 79/184 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 553 event pairs, 20 based on Foata normal form. 18/177 useless extension candidates. Maximal degree in co-relation 399. Up to 59 conditions per place. [2023-08-26 18:32:11,983 INFO L140 encePairwiseOnDemand]: 162/168 looper letters, 41 selfloop transitions, 6 changer transitions 0/48 dead transitions. [2023-08-26 18:32:11,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 48 transitions, 210 flow [2023-08-26 18:32:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:32:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:32:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 512 transitions. [2023-08-26 18:32:11,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2023-08-26 18:32:11,986 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 512 transitions. [2023-08-26 18:32:11,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 512 transitions. [2023-08-26 18:32:11,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:32:11,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 512 transitions. [2023-08-26 18:32:11,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.33333333333333) internal successors, (512), 6 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:11,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:11,990 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:11,990 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 52 flow. Second operand 6 states and 512 transitions. [2023-08-26 18:32:11,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 48 transitions, 210 flow [2023-08-26 18:32:11,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 48 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:32:11,991 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 102 flow [2023-08-26 18:32:11,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-08-26 18:32:11,992 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2023-08-26 18:32:11,992 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 102 flow [2023-08-26 18:32:11,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:11,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:11,993 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2023-08-26 18:32:12,004 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 18:32:12,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:32:12,194 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:32:12,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:12,194 INFO L85 PathProgramCache]: Analyzing trace with hash -105612143, now seen corresponding path program 2 times [2023-08-26 18:32:12,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:12,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333915270] [2023-08-26 18:32:12,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:12,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:32:12,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:12,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333915270] [2023-08-26 18:32:12,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333915270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:32:12,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080997208] [2023-08-26 18:32:12,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 18:32:12,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:32:12,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:32:12,309 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 18:32:12,311 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 18:32:12,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 18:32:12,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 18:32:12,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 18:32:12,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:32:12,432 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 18:32:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-26 18:32:12,497 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 18:32:12,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080997208] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:32:12,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 18:32:12,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-26 18:32:12,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346875461] [2023-08-26 18:32:12,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:32:12,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:32:12,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:12,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:32:12,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:32:12,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 168 [2023-08-26 18:32:12,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:12,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:12,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 168 [2023-08-26 18:32:12,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:32:12,532 INFO L124 PetriNetUnfolderBase]: 73/156 cut-off events. [2023-08-26 18:32:12,533 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2023-08-26 18:32:12,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 156 events. 73/156 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 444 event pairs, 55 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 473. Up to 148 conditions per place. [2023-08-26 18:32:12,536 INFO L140 encePairwiseOnDemand]: 166/168 looper letters, 18 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-26 18:32:12,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 20 transitions, 130 flow [2023-08-26 18:32:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:32:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:32:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-08-26 18:32:12,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2023-08-26 18:32:12,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-08-26 18:32:12,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-08-26 18:32:12,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:32:12,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-08-26 18:32:12,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:12,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 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 18:32:12,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 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 18:32:12,543 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 102 flow. Second operand 3 states and 226 transitions. [2023-08-26 18:32:12,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 20 transitions, 130 flow [2023-08-26 18:32:12,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 20 transitions, 122 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 18:32:12,546 INFO L231 Difference]: Finished difference. Result has 29 places, 20 transitions, 86 flow [2023-08-26 18:32:12,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=29, PETRI_TRANSITIONS=20} [2023-08-26 18:32:12,549 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2023-08-26 18:32:12,549 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 20 transitions, 86 flow [2023-08-26 18:32:12,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:12,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:12,550 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2023-08-26 18:32:12,557 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 18:32:12,755 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,SelfDestructingSolverStorable3 [2023-08-26 18:32:12,755 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:32:12,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash -105612144, now seen corresponding path program 1 times [2023-08-26 18:32:12,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:12,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892484441] [2023-08-26 18:32:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:12,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-26 18:32:12,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:12,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892484441] [2023-08-26 18:32:12,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892484441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:32:12,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:32:12,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:32:12,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804867545] [2023-08-26 18:32:12,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:32:12,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:32:12,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:12,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:32:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:32:12,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 168 [2023-08-26 18:32:12,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 20 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:12,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:12,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 168 [2023-08-26 18:32:12,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:32:12,837 INFO L124 PetriNetUnfolderBase]: 67/144 cut-off events. [2023-08-26 18:32:12,837 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-08-26 18:32:12,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 144 events. 67/144 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 401 event pairs, 50 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 402. Up to 136 conditions per place. [2023-08-26 18:32:12,838 INFO L140 encePairwiseOnDemand]: 166/168 looper letters, 17 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-26 18:32:12,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 19 transitions, 112 flow [2023-08-26 18:32:12,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:32:12,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:32:12,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-26 18:32:12,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2023-08-26 18:32:12,841 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-26 18:32:12,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-26 18:32:12,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:32:12,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-26 18:32:12,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:12,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 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 18:32:12,843 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 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 18:32:12,843 INFO L175 Difference]: Start difference. First operand has 29 places, 20 transitions, 86 flow. Second operand 3 states and 222 transitions. [2023-08-26 18:32:12,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 19 transitions, 112 flow [2023-08-26 18:32:12,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 19 transitions, 111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:32:12,844 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 77 flow [2023-08-26 18:32:12,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-26 18:32:12,844 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2023-08-26 18:32:12,844 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 77 flow [2023-08-26 18:32:12,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:12,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:12,845 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:32:12,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:32:12,845 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:32:12,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1905815957, now seen corresponding path program 1 times [2023-08-26 18:32:12,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:12,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273243703] [2023-08-26 18:32:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:12,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 18:32:12,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:12,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273243703] [2023-08-26 18:32:12,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273243703] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:32:12,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:32:12,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:32:12,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269877721] [2023-08-26 18:32:12,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:32:12,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:32:12,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:12,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:32:12,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:32:12,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 168 [2023-08-26 18:32:12,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 19 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:12,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:12,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 168 [2023-08-26 18:32:12,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:32:12,951 INFO L124 PetriNetUnfolderBase]: 111/232 cut-off events. [2023-08-26 18:32:12,951 INFO L125 PetriNetUnfolderBase]: For 291/291 co-relation queries the response was YES. [2023-08-26 18:32:12,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 232 events. 111/232 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 808 event pairs, 50 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 659. Up to 137 conditions per place. [2023-08-26 18:32:12,952 INFO L140 encePairwiseOnDemand]: 165/168 looper letters, 28 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-26 18:32:12,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 195 flow [2023-08-26 18:32:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:32:12,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:32:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-08-26 18:32:12,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2023-08-26 18:32:12,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-08-26 18:32:12,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-08-26 18:32:12,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:32:12,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-08-26 18:32:12,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:12,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 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 18:32:12,956 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 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 18:32:12,956 INFO L175 Difference]: Start difference. First operand has 29 places, 19 transitions, 77 flow. Second operand 3 states and 254 transitions. [2023-08-26 18:32:12,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 31 transitions, 195 flow [2023-08-26 18:32:12,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:32:12,958 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 88 flow [2023-08-26 18:32:12,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-08-26 18:32:12,960 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-08-26 18:32:12,960 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 88 flow [2023-08-26 18:32:12,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:12,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:12,961 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:32:12,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:32:12,961 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:32:12,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:12,963 INFO L85 PathProgramCache]: Analyzing trace with hash -200456292, now seen corresponding path program 1 times [2023-08-26 18:32:12,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:12,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068914323] [2023-08-26 18:32:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:12,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 18:32:13,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:13,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068914323] [2023-08-26 18:32:13,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068914323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:32:13,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079976804] [2023-08-26 18:32:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:13,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:32:13,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:32:13,057 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 18:32:13,099 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 18:32:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:13,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 18:32:13,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:32:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 18:32:13,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:32:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 18:32:13,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079976804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:32:13,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:32:13,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-26 18:32:13,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517109882] [2023-08-26 18:32:13,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:32:13,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:32:13,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:13,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:32:13,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:32:13,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 168 [2023-08-26 18:32:13,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 80.85714285714286) internal successors, (566), 7 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:13,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:13,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 168 [2023-08-26 18:32:13,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:32:13,281 INFO L124 PetriNetUnfolderBase]: 210/430 cut-off events. [2023-08-26 18:32:13,281 INFO L125 PetriNetUnfolderBase]: For 572/572 co-relation queries the response was YES. [2023-08-26 18:32:13,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1322 conditions, 430 events. 210/430 cut-off events. For 572/572 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1610 event pairs, 26 based on Foata normal form. 33/463 useless extension candidates. Maximal degree in co-relation 1312. Up to 114 conditions per place. [2023-08-26 18:32:13,283 INFO L140 encePairwiseOnDemand]: 164/168 looper letters, 57 selfloop transitions, 6 changer transitions 0/64 dead transitions. [2023-08-26 18:32:13,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 64 transitions, 442 flow [2023-08-26 18:32:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:32:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:32:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 508 transitions. [2023-08-26 18:32:13,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2023-08-26 18:32:13,285 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 508 transitions. [2023-08-26 18:32:13,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 508 transitions. [2023-08-26 18:32:13,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:32:13,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 508 transitions. [2023-08-26 18:32:13,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 84.66666666666667) internal successors, (508), 6 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:13,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:13,288 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:13,289 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 88 flow. Second operand 6 states and 508 transitions. [2023-08-26 18:32:13,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 64 transitions, 442 flow [2023-08-26 18:32:13,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 64 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:32:13,291 INFO L231 Difference]: Finished difference. Result has 39 places, 23 transitions, 126 flow [2023-08-26 18:32:13,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=39, PETRI_TRANSITIONS=23} [2023-08-26 18:32:13,292 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2023-08-26 18:32:13,292 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 23 transitions, 126 flow [2023-08-26 18:32:13,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 80.85714285714286) internal successors, (566), 7 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:13,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:13,293 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:32:13,299 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 18:32:13,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:32:13,498 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:32:13,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:13,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1658925175, now seen corresponding path program 2 times [2023-08-26 18:32:13,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:13,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677916441] [2023-08-26 18:32:13,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:13,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-08-26 18:32:13,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:13,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677916441] [2023-08-26 18:32:13,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677916441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:32:13,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:32:13,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:32:13,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953891522] [2023-08-26 18:32:13,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:32:13,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:32:13,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:13,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:32:13,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:32:13,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 168 [2023-08-26 18:32:13,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 23 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:13,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:13,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 168 [2023-08-26 18:32:13,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:32:13,615 INFO L124 PetriNetUnfolderBase]: 82/274 cut-off events. [2023-08-26 18:32:13,615 INFO L125 PetriNetUnfolderBase]: For 645/645 co-relation queries the response was YES. [2023-08-26 18:32:13,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 274 events. 82/274 cut-off events. For 645/645 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 963 event pairs, 36 based on Foata normal form. 80/354 useless extension candidates. Maximal degree in co-relation 931. Up to 158 conditions per place. [2023-08-26 18:32:13,617 INFO L140 encePairwiseOnDemand]: 164/168 looper letters, 14 selfloop transitions, 12 changer transitions 0/27 dead transitions. [2023-08-26 18:32:13,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 27 transitions, 211 flow [2023-08-26 18:32:13,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:32:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:32:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-08-26 18:32:13,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742063492063492 [2023-08-26 18:32:13,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-08-26 18:32:13,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-08-26 18:32:13,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:32:13,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-08-26 18:32:13,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:13,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 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 18:32:13,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 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 18:32:13,619 INFO L175 Difference]: Start difference. First operand has 39 places, 23 transitions, 126 flow. Second operand 3 states and 239 transitions. [2023-08-26 18:32:13,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 27 transitions, 211 flow [2023-08-26 18:32:13,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 27 transitions, 202 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 18:32:13,621 INFO L231 Difference]: Finished difference. Result has 40 places, 23 transitions, 142 flow [2023-08-26 18:32:13,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=40, PETRI_TRANSITIONS=23} [2023-08-26 18:32:13,623 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2023-08-26 18:32:13,623 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 23 transitions, 142 flow [2023-08-26 18:32:13,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:13,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:13,623 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:32:13,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:32:13,624 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:32:13,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:13,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1375233741, now seen corresponding path program 3 times [2023-08-26 18:32:13,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:13,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126558809] [2023-08-26 18:32:13,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:13,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-26 18:32:13,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:13,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126558809] [2023-08-26 18:32:13,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126558809] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:32:13,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936376509] [2023-08-26 18:32:13,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 18:32:13,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:32:13,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:32:13,733 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 18:32:13,735 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 18:32:13,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-26 18:32:13,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 18:32:13,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 18:32:13,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:32:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 18:32:13,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:32:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 18:32:13,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936376509] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:32:13,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:32:13,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-26 18:32:13,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887450745] [2023-08-26 18:32:13,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:32:13,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 18:32:13,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:13,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 18:32:13,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-08-26 18:32:13,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 168 [2023-08-26 18:32:13,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 23 transitions, 142 flow. Second operand has 17 states, 17 states have (on average 73.70588235294117) internal successors, (1253), 17 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:13,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:13,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 168 [2023-08-26 18:32:13,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:32:14,691 INFO L124 PetriNetUnfolderBase]: 177/677 cut-off events. [2023-08-26 18:32:14,691 INFO L125 PetriNetUnfolderBase]: For 2547/2547 co-relation queries the response was YES. [2023-08-26 18:32:14,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2526 conditions, 677 events. 177/677 cut-off events. For 2547/2547 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2979 event pairs, 5 based on Foata normal form. 127/804 useless extension candidates. Maximal degree in co-relation 2512. Up to 166 conditions per place. [2023-08-26 18:32:14,695 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 278 selfloop transitions, 138 changer transitions 0/417 dead transitions. [2023-08-26 18:32:14,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 417 transitions, 3286 flow [2023-08-26 18:32:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-26 18:32:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-26 18:32:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5153 transitions. [2023-08-26 18:32:14,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4578002842928216 [2023-08-26 18:32:14,706 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5153 transitions. [2023-08-26 18:32:14,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5153 transitions. [2023-08-26 18:32:14,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:32:14,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5153 transitions. [2023-08-26 18:32:14,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 76.91044776119404) internal successors, (5153), 67 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:14,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 168.0) internal successors, (11424), 68 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:14,728 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 168.0) internal successors, (11424), 68 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:14,729 INFO L175 Difference]: Start difference. First operand has 40 places, 23 transitions, 142 flow. Second operand 67 states and 5153 transitions. [2023-08-26 18:32:14,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 417 transitions, 3286 flow [2023-08-26 18:32:14,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 417 transitions, 3028 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:32:14,737 INFO L231 Difference]: Finished difference. Result has 151 places, 162 transitions, 1688 flow [2023-08-26 18:32:14,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=1688, PETRI_PLACES=151, PETRI_TRANSITIONS=162} [2023-08-26 18:32:14,738 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 130 predicate places. [2023-08-26 18:32:14,738 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 162 transitions, 1688 flow [2023-08-26 18:32:14,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 73.70588235294117) internal successors, (1253), 17 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:14,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:14,738 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:32:14,745 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 18:32:14,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:32:14,943 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:32:14,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:14,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1172421471, now seen corresponding path program 4 times [2023-08-26 18:32:14,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:14,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721501325] [2023-08-26 18:32:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:14,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-08-26 18:32:15,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:15,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721501325] [2023-08-26 18:32:15,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721501325] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:32:15,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289299229] [2023-08-26 18:32:15,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 18:32:15,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:32:15,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:32:15,133 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 18:32:15,157 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 18:32:15,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 18:32:15,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 18:32:15,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 18:32:15,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:32:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-08-26 18:32:15,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:32:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-08-26 18:32:15,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289299229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:32:15,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:32:15,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-08-26 18:32:15,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132593985] [2023-08-26 18:32:15,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:32:15,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 18:32:15,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:15,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 18:32:15,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-08-26 18:32:15,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 168 [2023-08-26 18:32:15,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 162 transitions, 1688 flow. Second operand has 15 states, 15 states have (on average 78.8) internal successors, (1182), 15 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:15,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:15,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 168 [2023-08-26 18:32:15,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:32:15,678 INFO L124 PetriNetUnfolderBase]: 280/1240 cut-off events. [2023-08-26 18:32:15,679 INFO L125 PetriNetUnfolderBase]: For 64875/64875 co-relation queries the response was YES. [2023-08-26 18:32:15,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6869 conditions, 1240 events. 280/1240 cut-off events. For 64875/64875 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 6785 event pairs, 44 based on Foata normal form. 301/1541 useless extension candidates. Maximal degree in co-relation 6809. Up to 307 conditions per place. [2023-08-26 18:32:15,688 INFO L140 encePairwiseOnDemand]: 164/168 looper letters, 238 selfloop transitions, 144 changer transitions 0/383 dead transitions. [2023-08-26 18:32:15,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 383 transitions, 5298 flow [2023-08-26 18:32:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 18:32:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 18:32:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1180 transitions. [2023-08-26 18:32:15,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017006802721088 [2023-08-26 18:32:15,692 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1180 transitions. [2023-08-26 18:32:15,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1180 transitions. [2023-08-26 18:32:15,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:32:15,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1180 transitions. [2023-08-26 18:32:15,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 84.28571428571429) internal successors, (1180), 14 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:15,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:15,697 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:15,698 INFO L175 Difference]: Start difference. First operand has 151 places, 162 transitions, 1688 flow. Second operand 14 states and 1180 transitions. [2023-08-26 18:32:15,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 383 transitions, 5298 flow [2023-08-26 18:32:15,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 383 transitions, 5154 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 18:32:15,773 INFO L231 Difference]: Finished difference. Result has 166 places, 229 transitions, 2669 flow [2023-08-26 18:32:15,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2669, PETRI_PLACES=166, PETRI_TRANSITIONS=229} [2023-08-26 18:32:15,774 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2023-08-26 18:32:15,774 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 229 transitions, 2669 flow [2023-08-26 18:32:15,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.8) internal successors, (1182), 15 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:15,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:15,774 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:32:15,782 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 18:32:15,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-26 18:32:15,980 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:32:15,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:15,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1829886433, now seen corresponding path program 5 times [2023-08-26 18:32:15,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:15,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388253698] [2023-08-26 18:32:15,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:15,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-08-26 18:32:16,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:16,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388253698] [2023-08-26 18:32:16,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388253698] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:32:16,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419735503] [2023-08-26 18:32:16,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 18:32:16,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:32:16,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:32:16,188 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 18:32:16,208 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 18:32:16,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-08-26 18:32:16,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 18:32:16,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 18:32:16,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:32:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 10 proven. 210 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-08-26 18:32:16,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:32:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 10 proven. 210 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-08-26 18:32:16,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419735503] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:32:16,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:32:16,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 33 [2023-08-26 18:32:16,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271233641] [2023-08-26 18:32:16,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:32:16,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-26 18:32:16,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:16,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-26 18:32:16,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=748, Unknown=0, NotChecked=0, Total=1056 [2023-08-26 18:32:16,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 168 [2023-08-26 18:32:16,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 229 transitions, 2669 flow. Second operand has 33 states, 33 states have (on average 72.96969696969697) internal successors, (2408), 33 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:16,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:16,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 168 [2023-08-26 18:32:16,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:32:23,937 INFO L124 PetriNetUnfolderBase]: 435/2148 cut-off events. [2023-08-26 18:32:23,937 INFO L125 PetriNetUnfolderBase]: For 186136/186136 co-relation queries the response was YES. [2023-08-26 18:32:23,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12428 conditions, 2148 events. 435/2148 cut-off events. For 186136/186136 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 13445 event pairs, 7 based on Foata normal form. 443/2591 useless extension candidates. Maximal degree in co-relation 12360. Up to 557 conditions per place. [2023-08-26 18:32:23,953 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 1054 selfloop transitions, 518 changer transitions 0/1573 dead transitions. [2023-08-26 18:32:23,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 1573 transitions, 17904 flow [2023-08-26 18:32:23,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2023-08-26 18:32:23,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2023-08-26 18:32:23,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 19397 transitions. [2023-08-26 18:32:23,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563570487483531 [2023-08-26 18:32:23,969 INFO L72 ComplementDD]: Start complementDD. Operand 253 states and 19397 transitions. [2023-08-26 18:32:23,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253 states and 19397 transitions. [2023-08-26 18:32:23,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:32:23,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 253 states and 19397 transitions. [2023-08-26 18:32:23,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 254 states, 253 states have (on average 76.66798418972331) internal successors, (19397), 253 states have internal predecessors, (19397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:24,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 254 states, 254 states have (on average 168.0) internal successors, (42672), 254 states have internal predecessors, (42672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:24,050 INFO L81 ComplementDD]: Finished complementDD. Result has 254 states, 254 states have (on average 168.0) internal successors, (42672), 254 states have internal predecessors, (42672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:24,051 INFO L175 Difference]: Start difference. First operand has 166 places, 229 transitions, 2669 flow. Second operand 253 states and 19397 transitions. [2023-08-26 18:32:24,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 1573 transitions, 17904 flow [2023-08-26 18:32:24,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 1573 transitions, 17782 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-26 18:32:24,147 INFO L231 Difference]: Finished difference. Result has 533 places, 559 transitions, 8010 flow [2023-08-26 18:32:24,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=253, PETRI_FLOW=8010, PETRI_PLACES=533, PETRI_TRANSITIONS=559} [2023-08-26 18:32:24,148 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 512 predicate places. [2023-08-26 18:32:24,148 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 559 transitions, 8010 flow [2023-08-26 18:32:24,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 72.96969696969697) internal successors, (2408), 33 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:24,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:24,148 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:32:24,159 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 18:32:24,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:32:24,354 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:32:24,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:24,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1324931022, now seen corresponding path program 6 times [2023-08-26 18:32:24,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:24,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140152175] [2023-08-26 18:32:24,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:24,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 20 proven. 231 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-08-26 18:32:24,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:24,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140152175] [2023-08-26 18:32:24,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140152175] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:32:24,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063541243] [2023-08-26 18:32:24,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 18:32:24,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:32:24,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:32:24,646 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 18:32:24,647 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 18:32:24,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2023-08-26 18:32:24,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 18:32:24,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 18:32:24,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:32:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 20 proven. 231 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-08-26 18:32:25,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:32:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 20 proven. 231 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-08-26 18:32:25,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063541243] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:32:25,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:32:25,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2023-08-26 18:32:25,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965025361] [2023-08-26 18:32:25,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:32:25,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-26 18:32:25,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-26 18:32:25,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-08-26 18:32:25,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 168 [2023-08-26 18:32:25,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 559 transitions, 8010 flow. Second operand has 23 states, 23 states have (on average 81.17391304347827) internal successors, (1867), 23 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:25,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:25,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 168 [2023-08-26 18:32:25,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:32:26,735 INFO L124 PetriNetUnfolderBase]: 690/3502 cut-off events. [2023-08-26 18:32:26,735 INFO L125 PetriNetUnfolderBase]: For 1391931/1391931 co-relation queries the response was YES. [2023-08-26 18:32:26,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31800 conditions, 3502 events. 690/3502 cut-off events. For 1391931/1391931 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 23620 event pairs, 47 based on Foata normal form. 387/3889 useless extension candidates. Maximal degree in co-relation 31612. Up to 921 conditions per place. [2023-08-26 18:32:26,782 INFO L140 encePairwiseOnDemand]: 164/168 looper letters, 671 selfloop transitions, 447 changer transitions 0/1119 dead transitions. [2023-08-26 18:32:26,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1119 transitions, 22125 flow [2023-08-26 18:32:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 18:32:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 18:32:26,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1874 transitions. [2023-08-26 18:32:26,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070346320346321 [2023-08-26 18:32:26,785 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1874 transitions. [2023-08-26 18:32:26,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1874 transitions. [2023-08-26 18:32:26,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:32:26,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1874 transitions. [2023-08-26 18:32:26,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 85.18181818181819) internal successors, (1874), 22 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:26,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:26,789 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:26,789 INFO L175 Difference]: Start difference. First operand has 533 places, 559 transitions, 8010 flow. Second operand 22 states and 1874 transitions. [2023-08-26 18:32:26,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1119 transitions, 22125 flow [2023-08-26 18:32:28,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 1119 transitions, 21087 flow, removed 150 selfloop flow, removed 60 redundant places. [2023-08-26 18:32:28,600 INFO L231 Difference]: Finished difference. Result has 504 places, 733 transitions, 10686 flow [2023-08-26 18:32:28,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=7080, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10686, PETRI_PLACES=504, PETRI_TRANSITIONS=733} [2023-08-26 18:32:28,601 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 483 predicate places. [2023-08-26 18:32:28,601 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 733 transitions, 10686 flow [2023-08-26 18:32:28,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 81.17391304347827) internal successors, (1867), 23 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:28,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:28,601 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:32:28,609 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 18:32:28,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:32:28,804 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 18:32:28,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:28,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1712674633, now seen corresponding path program 7 times [2023-08-26 18:32:28,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:28,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143157063] [2023-08-26 18:32:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:28,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:32:32,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:32,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143157063] [2023-08-26 18:32:32,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143157063] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:32:32,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796897499] [2023-08-26 18:32:32,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 18:32:32,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:32:32,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:32:32,003 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 18:32:32,005 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 18:32:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:32,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-26 18:32:32,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:32:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:32:32,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:32:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:32:32,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796897499] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:32:32,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:32:32,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-26 18:32:32,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980563480] [2023-08-26 18:32:32,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:32:32,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-26 18:32:32,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:32,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-26 18:32:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-26 18:32:32,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 168 [2023-08-26 18:32:32,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 733 transitions, 10686 flow. Second operand has 63 states, 63 states have (on average 77.34920634920636) internal successors, (4873), 63 states have internal predecessors, (4873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:32,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:32,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 168 [2023-08-26 18:32:32,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:34:14,323 INFO L124 PetriNetUnfolderBase]: 13018/45583 cut-off events. [2023-08-26 18:34:14,324 INFO L125 PetriNetUnfolderBase]: For 44696347/44696347 co-relation queries the response was YES. [2023-08-26 18:34:15,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009963 conditions, 45583 events. 13018/45583 cut-off events. For 44696347/44696347 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 523952 event pairs, 3201 based on Foata normal form. 1/45584 useless extension candidates. Maximal degree in co-relation 1009765. Up to 12399 conditions per place. [2023-08-26 18:34:16,047 INFO L140 encePairwiseOnDemand]: 163/168 looper letters, 11672 selfloop transitions, 1281 changer transitions 1/12954 dead transitions. [2023-08-26 18:34:16,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1155 places, 12954 transitions, 296338 flow [2023-08-26 18:34:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 652 states. [2023-08-26 18:34:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2023-08-26 18:34:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 52707 transitions. [2023-08-26 18:34:16,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48118426818580196 [2023-08-26 18:34:16,157 INFO L72 ComplementDD]: Start complementDD. Operand 652 states and 52707 transitions. [2023-08-26 18:34:16,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 652 states and 52707 transitions. [2023-08-26 18:34:16,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:34:16,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 652 states and 52707 transitions. [2023-08-26 18:34:16,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 653 states, 652 states have (on average 80.83895705521472) internal successors, (52707), 652 states have internal predecessors, (52707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:16,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 653 states, 653 states have (on average 168.0) internal successors, (109704), 653 states have internal predecessors, (109704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:16,378 INFO L81 ComplementDD]: Finished complementDD. Result has 653 states, 653 states have (on average 168.0) internal successors, (109704), 653 states have internal predecessors, (109704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:16,378 INFO L175 Difference]: Start difference. First operand has 504 places, 733 transitions, 10686 flow. Second operand 652 states and 52707 transitions. [2023-08-26 18:34:16,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1155 places, 12954 transitions, 296338 flow Received shutdown request... [2023-08-26 18:43:52,636 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 18:43:52,636 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 18:43:53,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-26 18:43:53,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-26 18:43:53,804 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (5 of 6 remaining) [2023-08-26 18:43:53,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 18:43:53,804 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-26 18:43:53,805 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-26 18:43:53,805 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-08-26 18:43:53,805 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-26 18:43:53,805 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2023-08-26 18:43:53,806 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2023-08-26 18:43:53,806 INFO L445 BasicCegarLoop]: Path program histogram: [7, 2, 1, 1, 1, 1] [2023-08-26 18:43:53,808 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:43:53,808 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:43:53,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:43:53 BasicIcfg [2023-08-26 18:43:53,809 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:43:53,810 INFO L158 Benchmark]: Toolchain (without parser) took 705143.69ms. Allocated memory was 404.8MB in the beginning and 4.3GB in the end (delta: 3.9GB). Free memory was 378.4MB in the beginning and 1.1GB in the end (delta: -742.8MB). Peak memory consumption was 4.0GB. Max. memory is 16.0GB. [2023-08-26 18:43:53,810 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 404.8MB. Free memory is still 381.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:43:53,810 INFO L158 Benchmark]: CACSL2BoogieTranslator took 567.96ms. Allocated memory is still 404.8MB. Free memory was 378.1MB in the beginning and 340.3MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. [2023-08-26 18:43:53,810 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.88ms. Allocated memory is still 404.8MB. Free memory was 340.3MB in the beginning and 337.6MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-26 18:43:53,810 INFO L158 Benchmark]: Boogie Preprocessor took 21.54ms. Allocated memory is still 404.8MB. Free memory was 337.6MB in the beginning and 336.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:43:53,810 INFO L158 Benchmark]: RCFGBuilder took 296.42ms. Allocated memory is still 404.8MB. Free memory was 336.1MB in the beginning and 376.6MB in the end (delta: -40.4MB). Peak memory consumption was 16.2MB. Max. memory is 16.0GB. [2023-08-26 18:43:53,811 INFO L158 Benchmark]: TraceAbstraction took 704209.41ms. Allocated memory was 404.8MB in the beginning and 4.3GB in the end (delta: 3.9GB). Free memory was 375.5MB in the beginning and 1.1GB in the end (delta: -745.7MB). Peak memory consumption was 4.0GB. Max. memory is 16.0GB. [2023-08-26 18:43:53,811 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 404.8MB. Free memory is still 381.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 567.96ms. Allocated memory is still 404.8MB. Free memory was 378.1MB in the beginning and 340.3MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 44.88ms. Allocated memory is still 404.8MB. Free memory was 340.3MB in the beginning and 337.6MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 21.54ms. Allocated memory is still 404.8MB. Free memory was 337.6MB in the beginning and 336.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 296.42ms. Allocated memory is still 404.8MB. Free memory was 336.1MB in the beginning and 376.6MB in the end (delta: -40.4MB). Peak memory consumption was 16.2MB. Max. memory is 16.0GB. * TraceAbstraction took 704209.41ms. Allocated memory was 404.8MB in the beginning and 4.3GB in the end (delta: 3.9GB). Free memory was 375.5MB in the beginning and 1.1GB in the end (delta: -745.7MB). Peak memory consumption was 4.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] - GenericResultAtLocation [Line: 246]: Unsoundness Warning unspecified type, defaulting to int C: short [246] - GenericResultAtLocation [Line: 1102]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [1102] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 81 PlacesBefore, 21 PlacesAfterwards, 83 TransitionsBefore, 19 TransitionsAfterwards, 798 CoEnabledTransitionPairs, 6 FixpointIterations, 40 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 3 ConcurrentYvCompositions, 4 ChoiceCompositions, 74 TotalNumberOfCompositions, 1058 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 808, independent: 749, independent conditional: 0, independent unconditional: 749, dependent: 59, dependent conditional: 0, dependent unconditional: 59, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 410, independent: 399, independent conditional: 0, independent unconditional: 399, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 808, independent: 350, independent conditional: 0, independent unconditional: 350, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 410, unknown conditional: 0, unknown unconditional: 410] , Statistics on independence cache: Total cache size (in pairs): 30, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 12]: 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: 1343]: 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 3 procedures, 106 locations, 6 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: 704.1s, OverallIterations: 13, TraceHistogramMax: 20, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 693.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7342 SdHoareTripleChecker+Valid, 61.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7342 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 50.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 59 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 222926 IncrementalHoareTripleChecker+Invalid, 222985 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 59 mSolverCounterUnsat, 0 mSDtfsCounter, 222926 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2164 GetRequests, 1128 SyntacticMatches, 15 SemanticMatches, 1021 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199736 ImplicationChecksByTransitivity, 23.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10686occurred in iteration=12, InterpolantAutomatonStates: 385, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 1057 NumberOfCodeBlocks, 1039 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1503 ConstructedInterpolants, 0 QuantifiedInterpolants, 5931 SizeOfPredicates, 40 NumberOfNonLiveVariables, 2827 ConjunctsInSsa, 219 ConjunctsInUnsatCore, 28 InterpolantComputations, 6 PerfectInterpolantSequences, 3176/8808 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown