/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/goblint-regression/28-race_reach_37-indirect_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:52:43,188 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:52:43,269 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 18:52:43,275 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:52:43,275 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:52:43,316 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:52:43,317 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:52:43,322 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:52:43,323 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:52:43,323 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:52:43,323 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:52:43,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:52:43,324 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:52:43,324 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:52:43,325 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:52:43,325 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:52:43,325 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:52:43,326 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:52:43,326 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:52:43,326 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:52:43,327 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:52:43,329 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:52:43,329 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:52:43,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:52:43,330 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:52:43,330 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:52:43,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:52:43,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:52:43,331 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:52:43,331 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:52:43,331 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:52:43,332 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:52:43,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:52:43,332 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:52:43,337 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:52:43,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:52:43,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:52:43,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:52:43,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:52:43,660 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:52:43,660 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:52:43,661 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-08-26 18:52:44,905 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:52:45,184 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:52:45,185 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-08-26 18:52:45,199 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af3928fa1/b63818a87dd04131bcf133fd09538066/FLAGf32df63cd [2023-08-26 18:52:45,211 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af3928fa1/b63818a87dd04131bcf133fd09538066 [2023-08-26 18:52:45,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:52:45,215 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:52:45,216 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:52:45,216 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:52:45,218 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:52:45,219 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:52:45" (1/1) ... [2023-08-26 18:52:45,219 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@531da6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:52:45, skipping insertion in model container [2023-08-26 18:52:45,219 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:52:45" (1/1) ... [2023-08-26 18:52:45,256 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:52:45,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:52:45,551 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:52:45,573 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 18:52:45,575 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 18:52:45,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:52:45,624 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:52:45,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:52:45 WrapperNode [2023-08-26 18:52:45,625 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:52:45,626 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:52:45,626 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:52:45,626 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:52:45,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:52:45" (1/1) ... [2023-08-26 18:52:45,644 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:52:45" (1/1) ... [2023-08-26 18:52:45,662 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2023-08-26 18:52:45,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:52:45,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:52:45,664 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:52:45,664 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:52:45,670 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:52:45" (1/1) ... [2023-08-26 18:52:45,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:52:45" (1/1) ... [2023-08-26 18:52:45,674 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:52:45" (1/1) ... [2023-08-26 18:52:45,674 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:52:45" (1/1) ... [2023-08-26 18:52:45,679 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:52:45" (1/1) ... [2023-08-26 18:52:45,683 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:52:45" (1/1) ... [2023-08-26 18:52:45,685 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:52:45" (1/1) ... [2023-08-26 18:52:45,686 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:52:45" (1/1) ... [2023-08-26 18:52:45,688 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:52:45,689 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:52:45,689 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:52:45,689 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:52:45,690 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:52:45" (1/1) ... [2023-08-26 18:52:45,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:52:45,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:52:45,734 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 18:52:45,737 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 18:52:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:52:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:52:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 18:52:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:52:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:52:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 18:52:45,765 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 18:52:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:52:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:52:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:52:45,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:52:45,767 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 18:52:45,892 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:52:45,898 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:52:46,215 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:52:46,224 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:52:46,224 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-26 18:52:46,228 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:52:46 BoogieIcfgContainer [2023-08-26 18:52:46,228 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:52:46,231 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:52:46,231 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:52:46,233 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:52:46,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:52:45" (1/3) ... [2023-08-26 18:52:46,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c2bd58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:52:46, skipping insertion in model container [2023-08-26 18:52:46,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:52:45" (2/3) ... [2023-08-26 18:52:46,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c2bd58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:52:46, skipping insertion in model container [2023-08-26 18:52:46,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:52:46" (3/3) ... [2023-08-26 18:52:46,236 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2023-08-26 18:52:46,253 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:52:46,253 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-26 18:52:46,253 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:52:46,308 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 18:52:46,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 128 transitions, 264 flow [2023-08-26 18:52:46,426 INFO L124 PetriNetUnfolderBase]: 19/172 cut-off events. [2023-08-26 18:52:46,427 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:52:46,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 172 events. 19/172 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 527 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2023-08-26 18:52:46,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 128 transitions, 264 flow [2023-08-26 18:52:46,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 128 transitions, 264 flow [2023-08-26 18:52:46,441 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:52:46,456 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 128 transitions, 264 flow [2023-08-26 18:52:46,459 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 128 transitions, 264 flow [2023-08-26 18:52:46,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 128 transitions, 264 flow [2023-08-26 18:52:46,499 INFO L124 PetriNetUnfolderBase]: 19/172 cut-off events. [2023-08-26 18:52:46,499 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:52:46,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 172 events. 19/172 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 527 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2023-08-26 18:52:46,507 INFO L119 LiptonReduction]: Number of co-enabled transitions 4000 [2023-08-26 18:52:49,936 INFO L134 LiptonReduction]: Checked pairs total: 7932 [2023-08-26 18:52:49,936 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-26 18:52:49,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:52:49,952 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;@60c5b899, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:52:49,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-26 18:52:49,955 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:52:49,955 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 18:52:49,955 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:52:49,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:52:49,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:52:49,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:52:49,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:52:49,960 INFO L85 PathProgramCache]: Analyzing trace with hash 15905, now seen corresponding path program 1 times [2023-08-26 18:52:49,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:52:49,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016110912] [2023-08-26 18:52:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:52:49,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:52:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:52:50,188 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 18:52:50,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:52:50,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016110912] [2023-08-26 18:52:50,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016110912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:52:50,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:52:50,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:52:50,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663134623] [2023-08-26 18:52:50,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:52:50,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:52:50,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:52:50,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:52:50,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:52:50,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 242 [2023-08-26 18:52:50,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 48 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:50,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:52:50,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 242 [2023-08-26 18:52:50,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:52:50,386 INFO L124 PetriNetUnfolderBase]: 196/441 cut-off events. [2023-08-26 18:52:50,386 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:52:50,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 886 conditions, 441 events. 196/441 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2164 event pairs, 180 based on Foata normal form. 14/261 useless extension candidates. Maximal degree in co-relation 838. Up to 402 conditions per place. [2023-08-26 18:52:50,391 INFO L140 encePairwiseOnDemand]: 227/242 looper letters, 42 selfloop transitions, 2 changer transitions 3/50 dead transitions. [2023-08-26 18:52:50,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 202 flow [2023-08-26 18:52:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:52:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:52:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-08-26 18:52:50,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453168044077135 [2023-08-26 18:52:50,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-08-26 18:52:50,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-08-26 18:52:50,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:52:50,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-08-26 18:52:50,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:50,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:50,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:50,417 INFO L175 Difference]: Start difference. First operand has 41 places, 48 transitions, 104 flow. Second operand 3 states and 329 transitions. [2023-08-26 18:52:50,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 202 flow [2023-08-26 18:52:50,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:52:50,422 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 82 flow [2023-08-26 18:52:50,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2023-08-26 18:52:50,429 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2023-08-26 18:52:50,429 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 82 flow [2023-08-26 18:52:50,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:50,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:52:50,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:52:50,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:52:50,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:52:50,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:52:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash 15904, now seen corresponding path program 1 times [2023-08-26 18:52:50,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:52:50,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545871765] [2023-08-26 18:52:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:52:50,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:52:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:52:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:52:50,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:52:50,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545871765] [2023-08-26 18:52:50,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545871765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:52:50,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:52:50,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:52:50,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105820474] [2023-08-26 18:52:50,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:52:50,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:52:50,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:52:50,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:52:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:52:50,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 242 [2023-08-26 18:52:50,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:50,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:52:50,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 242 [2023-08-26 18:52:50,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:52:50,726 INFO L124 PetriNetUnfolderBase]: 156/363 cut-off events. [2023-08-26 18:52:50,727 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:52:50,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 363 events. 156/363 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1978 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 692. Up to 331 conditions per place. [2023-08-26 18:52:50,732 INFO L140 encePairwiseOnDemand]: 238/242 looper letters, 40 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-26 18:52:50,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 192 flow [2023-08-26 18:52:50,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:52:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:52:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-08-26 18:52:50,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39944903581267216 [2023-08-26 18:52:50,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-08-26 18:52:50,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-08-26 18:52:50,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:52:50,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-08-26 18:52:50,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:50,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:50,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:50,747 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 82 flow. Second operand 3 states and 290 transitions. [2023-08-26 18:52:50,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 192 flow [2023-08-26 18:52:50,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 48 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:52:50,751 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 88 flow [2023-08-26 18:52:50,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-26 18:52:50,752 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-08-26 18:52:50,752 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 88 flow [2023-08-26 18:52:50,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:50,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:52:50,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 18:52:50,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:52:50,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:52:50,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:52:50,763 INFO L85 PathProgramCache]: Analyzing trace with hash 474120046, now seen corresponding path program 1 times [2023-08-26 18:52:50,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:52:50,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820703738] [2023-08-26 18:52:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:52:50,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:52:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:52:50,933 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 18:52:50,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:52:50,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820703738] [2023-08-26 18:52:50,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820703738] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:52:50,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625077504] [2023-08-26 18:52:50,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:52:50,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:52:50,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:52:50,941 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 18:52:50,954 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 18:52:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:52:51,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 18:52:51,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:52:51,118 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 18:52:51,179 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 18:52:51,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:52:51,247 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 18:52:51,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625077504] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:52:51,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:52:51,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 18:52:51,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753983708] [2023-08-26 18:52:51,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:52:51,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:52:51,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:52:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:52:51,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:52:51,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 242 [2023-08-26 18:52:51,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 88 flow. Second operand has 8 states, 8 states have (on average 83.875) internal successors, (671), 8 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:52:51,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 242 [2023-08-26 18:52:51,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:52:51,340 INFO L124 PetriNetUnfolderBase]: 24/83 cut-off events. [2023-08-26 18:52:51,340 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 18:52:51,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 83 events. 24/83 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 266 event pairs, 0 based on Foata normal form. 13/89 useless extension candidates. Maximal degree in co-relation 155. Up to 50 conditions per place. [2023-08-26 18:52:51,341 INFO L140 encePairwiseOnDemand]: 238/242 looper letters, 21 selfloop transitions, 2 changer transitions 6/35 dead transitions. [2023-08-26 18:52:51,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 139 flow [2023-08-26 18:52:51,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:52:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:52:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 359 transitions. [2023-08-26 18:52:51,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37086776859504134 [2023-08-26 18:52:51,343 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 359 transitions. [2023-08-26 18:52:51,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 359 transitions. [2023-08-26 18:52:51,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:52:51,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 359 transitions. [2023-08-26 18:52:51,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,347 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,347 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 88 flow. Second operand 4 states and 359 transitions. [2023-08-26 18:52:51,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 139 flow [2023-08-26 18:52:51,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 133 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:52:51,350 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 47 flow [2023-08-26 18:52:51,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=47, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-26 18:52:51,351 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -13 predicate places. [2023-08-26 18:52:51,351 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 47 flow [2023-08-26 18:52:51,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 83.875) internal successors, (671), 8 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:52:51,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:52:51,361 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 18:52:51,560 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 18:52:51,561 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:52:51,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:52:51,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1812793205, now seen corresponding path program 1 times [2023-08-26 18:52:51,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:52:51,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930979151] [2023-08-26 18:52:51,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:52:51,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:52:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:52:51,743 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 18:52:51,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:52:51,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930979151] [2023-08-26 18:52:51,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930979151] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:52:51,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:52:51,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:52:51,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123547315] [2023-08-26 18:52:51,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:52:51,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:52:51,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:52:51,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:52:51,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:52:51,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 242 [2023-08-26 18:52:51,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 47 flow. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:52:51,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 242 [2023-08-26 18:52:51,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:52:51,774 INFO L124 PetriNetUnfolderBase]: 20/61 cut-off events. [2023-08-26 18:52:51,774 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 18:52:51,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 61 events. 20/61 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 20 based on Foata normal form. 2/52 useless extension candidates. Maximal degree in co-relation 117. Up to 55 conditions per place. [2023-08-26 18:52:51,775 INFO L140 encePairwiseOnDemand]: 239/242 looper letters, 13 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 18:52:51,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 71 flow [2023-08-26 18:52:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:52:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:52:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2023-08-26 18:52:51,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3608815426997245 [2023-08-26 18:52:51,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2023-08-26 18:52:51,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2023-08-26 18:52:51,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:52:51,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2023-08-26 18:52:51,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,780 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 47 flow. Second operand 3 states and 262 transitions. [2023-08-26 18:52:51,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 71 flow [2023-08-26 18:52:51,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 17 transitions, 68 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:52:51,781 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 42 flow [2023-08-26 18:52:51,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-26 18:52:51,782 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -18 predicate places. [2023-08-26 18:52:51,783 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 42 flow [2023-08-26 18:52:51,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:52:51,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:52:51,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:52:51,783 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:52:51,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:52:51,784 INFO L85 PathProgramCache]: Analyzing trace with hash 362011768, now seen corresponding path program 1 times [2023-08-26 18:52:51,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:52:51,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926295430] [2023-08-26 18:52:51,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:52:51,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:52:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:52:51,917 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 18:52:51,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:52:51,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926295430] [2023-08-26 18:52:51,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926295430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:52:51,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:52:51,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:52:51,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111337006] [2023-08-26 18:52:51,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:52:51,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:52:51,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:52:51,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:52:51,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:52:51,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 242 [2023-08-26 18:52:51,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:52:51,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 242 [2023-08-26 18:52:51,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:52:51,941 INFO L124 PetriNetUnfolderBase]: 12/40 cut-off events. [2023-08-26 18:52:51,941 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:52:51,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 40 events. 12/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 12 based on Foata normal form. 3/41 useless extension candidates. Maximal degree in co-relation 85. Up to 35 conditions per place. [2023-08-26 18:52:51,943 INFO L140 encePairwiseOnDemand]: 237/242 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-26 18:52:51,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 54 flow [2023-08-26 18:52:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:52:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:52:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-26 18:52:51,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35399449035812675 [2023-08-26 18:52:51,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-26 18:52:51,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-26 18:52:51,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:52:51,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-26 18:52:51,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,947 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 42 flow. Second operand 3 states and 257 transitions. [2023-08-26 18:52:51,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 54 flow [2023-08-26 18:52:51,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 53 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:52:51,949 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-26 18:52:51,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-26 18:52:51,950 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -21 predicate places. [2023-08-26 18:52:51,951 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-26 18:52:51,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:51,953 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 23 remaining) [2023-08-26 18:52:51,954 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-26 18:52:51,956 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-26 18:52:51,958 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-26 18:52:51,958 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-26 18:52:51,958 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (17 of 23 remaining) [2023-08-26 18:52:51,958 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-26 18:52:51,958 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-26 18:52:51,959 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-26 18:52:51,959 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2023-08-26 18:52:51,959 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2023-08-26 18:52:51,959 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 23 remaining) [2023-08-26 18:52:51,959 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-26 18:52:51,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-26 18:52:51,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 23 remaining) [2023-08-26 18:52:51,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2023-08-26 18:52:51,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-26 18:52:51,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-26 18:52:51,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-26 18:52:51,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-26 18:52:51,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 23 remaining) [2023-08-26 18:52:51,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-26 18:52:51,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-26 18:52:51,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:52:51,961 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 18:52:51,963 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-26 18:52:51,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 128 transitions, 264 flow [2023-08-26 18:52:51,993 INFO L124 PetriNetUnfolderBase]: 19/172 cut-off events. [2023-08-26 18:52:51,993 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:52:51,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 172 events. 19/172 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 527 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2023-08-26 18:52:51,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 128 transitions, 264 flow [2023-08-26 18:52:51,995 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 123 transitions, 251 flow [2023-08-26 18:52:51,995 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:52:51,995 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 123 transitions, 251 flow [2023-08-26 18:52:51,999 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 123 transitions, 251 flow [2023-08-26 18:52:51,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 123 transitions, 251 flow [2023-08-26 18:52:52,016 INFO L124 PetriNetUnfolderBase]: 18/167 cut-off events. [2023-08-26 18:52:52,016 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:52:52,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 167 events. 18/167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 502 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2023-08-26 18:52:52,018 INFO L119 LiptonReduction]: Number of co-enabled transitions 4000 [2023-08-26 18:52:54,928 INFO L134 LiptonReduction]: Checked pairs total: 7701 [2023-08-26 18:52:54,928 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-26 18:52:54,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 18:52:54,930 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;@60c5b899, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:52:54,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 18:52:54,933 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:52:54,934 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2023-08-26 18:52:54,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:52:54,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:52:54,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 18:52:54,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 18:52:54,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:52:54,934 INFO L85 PathProgramCache]: Analyzing trace with hash 805690956, now seen corresponding path program 1 times [2023-08-26 18:52:54,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:52:54,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038792066] [2023-08-26 18:52:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:52:54,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:52:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:52:54,956 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 18:52:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:52:54,988 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 18:52:54,989 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 18:52:54,989 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 18:52:54,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:52:54,989 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 18:52:54,990 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-26 18:52:54,990 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 18:52:54,990 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 18:52:55,016 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 18:52:55,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 170 transitions, 358 flow [2023-08-26 18:52:55,053 INFO L124 PetriNetUnfolderBase]: 34/285 cut-off events. [2023-08-26 18:52:55,053 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:52:55,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 285 events. 34/285 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1032 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2023-08-26 18:52:55,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 170 transitions, 358 flow [2023-08-26 18:52:55,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 170 transitions, 358 flow [2023-08-26 18:52:55,058 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:52:55,059 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 170 transitions, 358 flow [2023-08-26 18:52:55,060 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 170 transitions, 358 flow [2023-08-26 18:52:55,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 170 transitions, 358 flow [2023-08-26 18:52:55,086 INFO L124 PetriNetUnfolderBase]: 34/285 cut-off events. [2023-08-26 18:52:55,086 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:52:55,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 285 events. 34/285 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1032 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2023-08-26 18:52:55,094 INFO L119 LiptonReduction]: Number of co-enabled transitions 12080 [2023-08-26 18:52:58,198 INFO L134 LiptonReduction]: Checked pairs total: 29614 [2023-08-26 18:52:58,198 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-08-26 18:52:58,200 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:52:58,201 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;@60c5b899, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:52:58,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-08-26 18:52:58,202 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:52:58,202 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 18:52:58,202 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:52:58,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:52:58,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:52:58,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:52:58,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:52:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash 30955, now seen corresponding path program 1 times [2023-08-26 18:52:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:52:58,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016756679] [2023-08-26 18:52:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:52:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:52:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:52:58,264 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 18:52:58,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:52:58,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016756679] [2023-08-26 18:52:58,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016756679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:52:58,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:52:58,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:52:58,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491282367] [2023-08-26 18:52:58,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:52:58,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:52:58,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:52:58,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:52:58,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:52:58,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 318 [2023-08-26 18:52:58,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 76 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:58,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:52:58,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 318 [2023-08-26 18:52:58,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:52:59,230 INFO L124 PetriNetUnfolderBase]: 6834/11423 cut-off events. [2023-08-26 18:52:59,231 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-08-26 18:52:59,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22324 conditions, 11423 events. 6834/11423 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 79914 event pairs, 3234 based on Foata normal form. 503/7689 useless extension candidates. Maximal degree in co-relation 2390. Up to 10771 conditions per place. [2023-08-26 18:52:59,309 INFO L140 encePairwiseOnDemand]: 296/318 looper letters, 64 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-26 18:52:59,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 75 transitions, 300 flow [2023-08-26 18:52:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:52:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:52:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-08-26 18:52:59,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381551362683438 [2023-08-26 18:52:59,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-08-26 18:52:59,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-08-26 18:52:59,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:52:59,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-08-26 18:52:59,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:59,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:59,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:59,320 INFO L175 Difference]: Start difference. First operand has 65 places, 76 transitions, 170 flow. Second operand 3 states and 418 transitions. [2023-08-26 18:52:59,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 75 transitions, 300 flow [2023-08-26 18:52:59,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 75 transitions, 300 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:52:59,324 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 148 flow [2023-08-26 18:52:59,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-26 18:52:59,325 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-08-26 18:52:59,326 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 148 flow [2023-08-26 18:52:59,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:59,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:52:59,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:52:59,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:52:59,326 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:52:59,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:52:59,327 INFO L85 PathProgramCache]: Analyzing trace with hash 30956, now seen corresponding path program 1 times [2023-08-26 18:52:59,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:52:59,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272522626] [2023-08-26 18:52:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:52:59,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:52:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:52:59,354 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 18:52:59,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:52:59,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272522626] [2023-08-26 18:52:59,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272522626] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:52:59,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:52:59,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:52:59,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196700733] [2023-08-26 18:52:59,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:52:59,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:52:59,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:52:59,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:52:59,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:52:59,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 318 [2023-08-26 18:52:59,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:52:59,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:52:59,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 318 [2023-08-26 18:52:59,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:53:00,217 INFO L124 PetriNetUnfolderBase]: 6782/11018 cut-off events. [2023-08-26 18:53:00,217 INFO L125 PetriNetUnfolderBase]: For 631/631 co-relation queries the response was YES. [2023-08-26 18:53:00,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22642 conditions, 11018 events. 6782/11018 cut-off events. For 631/631 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 73817 event pairs, 6255 based on Foata normal form. 0/6965 useless extension candidates. Maximal degree in co-relation 22530. Up to 9894 conditions per place. [2023-08-26 18:53:00,283 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 78 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-26 18:53:00,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 364 flow [2023-08-26 18:53:00,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:53:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:53:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-08-26 18:53:00,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44025157232704404 [2023-08-26 18:53:00,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-08-26 18:53:00,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-08-26 18:53:00,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:53:00,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-08-26 18:53:00,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:00,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:00,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:00,289 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 148 flow. Second operand 3 states and 420 transitions. [2023-08-26 18:53:00,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 364 flow [2023-08-26 18:53:00,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 87 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:53:00,292 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 146 flow [2023-08-26 18:53:00,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-08-26 18:53:00,293 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-08-26 18:53:00,293 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 146 flow [2023-08-26 18:53:00,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:00,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:53:00,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:53:00,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:53:00,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:53:00,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:53:00,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1453727365, now seen corresponding path program 1 times [2023-08-26 18:53:00,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:53:00,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693776781] [2023-08-26 18:53:00,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:53:00,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:53:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:53:00,478 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 18:53:00,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:53:00,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693776781] [2023-08-26 18:53:00,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693776781] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:53:00,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:53:00,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:53:00,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884690119] [2023-08-26 18:53:00,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:53:00,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:53:00,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:53:00,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:53:00,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:53:00,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 318 [2023-08-26 18:53:00,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:00,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:53:00,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 318 [2023-08-26 18:53:00,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:53:01,163 INFO L124 PetriNetUnfolderBase]: 5176/8482 cut-off events. [2023-08-26 18:53:01,163 INFO L125 PetriNetUnfolderBase]: For 667/667 co-relation queries the response was YES. [2023-08-26 18:53:01,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17632 conditions, 8482 events. 5176/8482 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 54039 event pairs, 4771 based on Foata normal form. 412/6137 useless extension candidates. Maximal degree in co-relation 16167. Up to 7592 conditions per place. [2023-08-26 18:53:01,219 INFO L140 encePairwiseOnDemand]: 312/318 looper letters, 70 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-26 18:53:01,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 334 flow [2023-08-26 18:53:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:53:01,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:53:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 455 transitions. [2023-08-26 18:53:01,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3577044025157233 [2023-08-26 18:53:01,221 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 455 transitions. [2023-08-26 18:53:01,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 455 transitions. [2023-08-26 18:53:01,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:53:01,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 455 transitions. [2023-08-26 18:53:01,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:01,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:01,225 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 318.0) internal successors, (1590), 5 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:01,225 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 146 flow. Second operand 4 states and 455 transitions. [2023-08-26 18:53:01,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 334 flow [2023-08-26 18:53:01,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 330 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:53:01,235 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 138 flow [2023-08-26 18:53:01,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2023-08-26 18:53:01,237 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-08-26 18:53:01,237 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 138 flow [2023-08-26 18:53:01,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:01,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:53:01,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:53:01,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:53:01,240 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:53:01,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:53:01,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1453934948, now seen corresponding path program 1 times [2023-08-26 18:53:01,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:53:01,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212402485] [2023-08-26 18:53:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:53:01,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:53:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:53:01,315 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 18:53:01,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:53:01,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212402485] [2023-08-26 18:53:01,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212402485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:53:01,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973358891] [2023-08-26 18:53:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:53:01,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:53:01,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:53:01,321 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 18:53:01,343 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 18:53:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:53:01,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 18:53:01,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:53:01,398 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 18:53:01,444 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 18:53:01,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:53:01,484 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 18:53:01,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973358891] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:53:01,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:53:01,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 18:53:01,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171130020] [2023-08-26 18:53:01,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:53:01,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:53:01,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:53:01,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:53:01,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:53:01,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 318 [2023-08-26 18:53:01,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 138 flow. Second operand has 8 states, 8 states have (on average 109.875) internal successors, (879), 8 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:01,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:53:01,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 318 [2023-08-26 18:53:01,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:53:01,757 INFO L124 PetriNetUnfolderBase]: 804/1577 cut-off events. [2023-08-26 18:53:01,758 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2023-08-26 18:53:01,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3498 conditions, 1577 events. 804/1577 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 9324 event pairs, 0 based on Foata normal form. 182/1515 useless extension candidates. Maximal degree in co-relation 3488. Up to 962 conditions per place. [2023-08-26 18:53:01,766 INFO L140 encePairwiseOnDemand]: 314/318 looper letters, 65 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-08-26 18:53:01,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 308 flow [2023-08-26 18:53:01,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:53:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:53:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 612 transitions. [2023-08-26 18:53:01,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3849056603773585 [2023-08-26 18:53:01,769 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 612 transitions. [2023-08-26 18:53:01,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 612 transitions. [2023-08-26 18:53:01,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:53:01,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 612 transitions. [2023-08-26 18:53:01,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.4) internal successors, (612), 5 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:01,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:01,774 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 318.0) internal successors, (1908), 6 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:01,774 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 138 flow. Second operand 5 states and 612 transitions. [2023-08-26 18:53:01,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 308 flow [2023-08-26 18:53:01,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 305 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 18:53:01,777 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 99 flow [2023-08-26 18:53:01,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-08-26 18:53:01,778 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -16 predicate places. [2023-08-26 18:53:01,778 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 99 flow [2023-08-26 18:53:01,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 109.875) internal successors, (879), 8 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:01,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:53:01,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:53:01,787 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 18:53:01,984 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,SelfDestructingSolverStorable9 [2023-08-26 18:53:01,985 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:53:01,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:53:01,985 INFO L85 PathProgramCache]: Analyzing trace with hash -2115876646, now seen corresponding path program 1 times [2023-08-26 18:53:01,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:53:01,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083562289] [2023-08-26 18:53:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:53:01,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:53:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:53:02,106 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 18:53:02,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:53:02,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083562289] [2023-08-26 18:53:02,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083562289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:53:02,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:53:02,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:53:02,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134344765] [2023-08-26 18:53:02,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:53:02,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:53:02,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:53:02,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:53:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:53:02,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 318 [2023-08-26 18:53:02,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 94.2) internal successors, (471), 5 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:02,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:53:02,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 318 [2023-08-26 18:53:02,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:53:02,191 INFO L124 PetriNetUnfolderBase]: 468/858 cut-off events. [2023-08-26 18:53:02,191 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2023-08-26 18:53:02,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1922 conditions, 858 events. 468/858 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3974 event pairs, 468 based on Foata normal form. 0/851 useless extension candidates. Maximal degree in co-relation 1911. Up to 800 conditions per place. [2023-08-26 18:53:02,193 INFO L140 encePairwiseOnDemand]: 309/318 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-08-26 18:53:02,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 30 transitions, 131 flow [2023-08-26 18:53:02,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:53:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:53:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-08-26 18:53:02,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3249475890985325 [2023-08-26 18:53:02,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-08-26 18:53:02,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-08-26 18:53:02,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:53:02,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-08-26 18:53:02,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:02,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:02,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:02,199 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 99 flow. Second operand 3 states and 310 transitions. [2023-08-26 18:53:02,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 30 transitions, 131 flow [2023-08-26 18:53:02,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 124 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 18:53:02,200 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-08-26 18:53:02,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-08-26 18:53:02,201 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -25 predicate places. [2023-08-26 18:53:02,201 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-08-26 18:53:02,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.2) internal successors, (471), 5 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:02,201 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 31 remaining) [2023-08-26 18:53:02,201 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 31 remaining) [2023-08-26 18:53:02,201 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 31 remaining) [2023-08-26 18:53:02,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 31 remaining) [2023-08-26 18:53:02,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 31 remaining) [2023-08-26 18:53:02,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 31 remaining) [2023-08-26 18:53:02,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 31 remaining) [2023-08-26 18:53:02,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 31 remaining) [2023-08-26 18:53:02,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 31 remaining) [2023-08-26 18:53:02,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 31 remaining) [2023-08-26 18:53:02,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 31 remaining) [2023-08-26 18:53:02,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 31 remaining) [2023-08-26 18:53:02,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 31 remaining) [2023-08-26 18:53:02,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 31 remaining) [2023-08-26 18:53:02,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 31 remaining) [2023-08-26 18:53:02,202 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 31 remaining) [2023-08-26 18:53:02,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 31 remaining) [2023-08-26 18:53:02,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 31 remaining) [2023-08-26 18:53:02,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 31 remaining) [2023-08-26 18:53:02,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 31 remaining) [2023-08-26 18:53:02,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 31 remaining) [2023-08-26 18:53:02,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 31 remaining) [2023-08-26 18:53:02,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 31 remaining) [2023-08-26 18:53:02,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (7 of 31 remaining) [2023-08-26 18:53:02,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 31 remaining) [2023-08-26 18:53:02,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 31 remaining) [2023-08-26 18:53:02,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 31 remaining) [2023-08-26 18:53:02,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 31 remaining) [2023-08-26 18:53:02,203 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 31 remaining) [2023-08-26 18:53:02,204 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 31 remaining) [2023-08-26 18:53:02,204 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 31 remaining) [2023-08-26 18:53:02,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 18:53:02,204 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 18:53:02,205 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-26 18:53:02,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 170 transitions, 358 flow [2023-08-26 18:53:02,226 INFO L124 PetriNetUnfolderBase]: 34/285 cut-off events. [2023-08-26 18:53:02,226 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:53:02,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 285 events. 34/285 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1032 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2023-08-26 18:53:02,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 170 transitions, 358 flow [2023-08-26 18:53:02,228 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 170 transitions, 358 flow [2023-08-26 18:53:02,229 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:53:02,229 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 170 transitions, 358 flow [2023-08-26 18:53:02,229 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 170 transitions, 358 flow [2023-08-26 18:53:02,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 170 transitions, 358 flow [2023-08-26 18:53:02,248 INFO L124 PetriNetUnfolderBase]: 34/285 cut-off events. [2023-08-26 18:53:02,248 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:53:02,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 285 events. 34/285 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1032 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2023-08-26 18:53:02,256 INFO L119 LiptonReduction]: Number of co-enabled transitions 12080 [2023-08-26 18:53:05,436 INFO L134 LiptonReduction]: Checked pairs total: 29973 [2023-08-26 18:53:05,437 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-08-26 18:53:05,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 18:53:05,439 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;@60c5b899, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:53:05,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 18:53:05,443 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:53:05,443 INFO L124 PetriNetUnfolderBase]: 14/85 cut-off events. [2023-08-26 18:53:05,443 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 18:53:05,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:53:05,444 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 18:53:05,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 18:53:05,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:53:05,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1223334383, now seen corresponding path program 1 times [2023-08-26 18:53:05,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:53:05,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263395762] [2023-08-26 18:53:05,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:53:05,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:53:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:53:05,460 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 18:53:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:53:05,473 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 18:53:05,474 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 18:53:05,474 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 18:53:05,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 18:53:05,474 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 18:53:05,475 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-26 18:53:05,475 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 18:53:05,475 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 18:53:05,500 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 18:53:05,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 212 transitions, 454 flow [2023-08-26 18:53:05,541 INFO L124 PetriNetUnfolderBase]: 54/435 cut-off events. [2023-08-26 18:53:05,542 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 18:53:05,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 435 events. 54/435 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1720 event pairs, 1 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 293. Up to 16 conditions per place. [2023-08-26 18:53:05,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 212 transitions, 454 flow [2023-08-26 18:53:05,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 212 transitions, 454 flow [2023-08-26 18:53:05,548 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:53:05,548 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 212 transitions, 454 flow [2023-08-26 18:53:05,548 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 212 transitions, 454 flow [2023-08-26 18:53:05,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 212 transitions, 454 flow [2023-08-26 18:53:05,582 INFO L124 PetriNetUnfolderBase]: 54/435 cut-off events. [2023-08-26 18:53:05,582 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 18:53:05,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 435 events. 54/435 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1720 event pairs, 1 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 293. Up to 16 conditions per place. [2023-08-26 18:53:05,598 INFO L119 LiptonReduction]: Number of co-enabled transitions 23280 [2023-08-26 18:53:08,893 INFO L134 LiptonReduction]: Checked pairs total: 61791 [2023-08-26 18:53:08,893 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-08-26 18:53:08,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:53:08,895 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;@60c5b899, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:53:08,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-08-26 18:53:08,896 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:53:08,896 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-08-26 18:53:08,896 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:53:08,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:53:08,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:53:08,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:53:08,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:53:08,897 INFO L85 PathProgramCache]: Analyzing trace with hash 49331, now seen corresponding path program 1 times [2023-08-26 18:53:08,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:53:08,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353112581] [2023-08-26 18:53:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:53:08,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:53:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:53:08,932 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 18:53:08,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:53:08,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353112581] [2023-08-26 18:53:08,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353112581] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:53:08,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:53:08,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:53:08,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854622419] [2023-08-26 18:53:08,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:53:08,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:53:08,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:53:08,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:53:08,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:53:08,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 384 [2023-08-26 18:53:08,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 103 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:08,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:53:08,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 384 [2023-08-26 18:53:08,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:53:21,807 INFO L124 PetriNetUnfolderBase]: 149915/215292 cut-off events. [2023-08-26 18:53:21,807 INFO L125 PetriNetUnfolderBase]: For 2728/2728 co-relation queries the response was YES. [2023-08-26 18:53:22,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424033 conditions, 215292 events. 149915/215292 cut-off events. For 2728/2728 co-relation queries the response was YES. Maximal size of possible extension queue 5435. Compared 1678860 event pairs, 97803 based on Foata normal form. 11196/153629 useless extension candidates. Maximal degree in co-relation 31898. Up to 206916 conditions per place. [2023-08-26 18:53:23,123 INFO L140 encePairwiseOnDemand]: 354/384 looper letters, 79 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-26 18:53:23,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 94 transitions, 380 flow [2023-08-26 18:53:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:53:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:53:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-26 18:53:23,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505208333333333 [2023-08-26 18:53:23,126 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-26 18:53:23,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-26 18:53:23,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:53:23,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-26 18:53:23,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:23,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:23,130 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:23,130 INFO L175 Difference]: Start difference. First operand has 87 places, 103 transitions, 236 flow. Second operand 3 states and 519 transitions. [2023-08-26 18:53:23,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 94 transitions, 380 flow [2023-08-26 18:53:23,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 94 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:53:23,134 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 198 flow [2023-08-26 18:53:23,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2023-08-26 18:53:23,135 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -3 predicate places. [2023-08-26 18:53:23,135 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 198 flow [2023-08-26 18:53:23,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:23,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:53:23,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:53:23,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 18:53:23,135 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:53:23,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:53:23,136 INFO L85 PathProgramCache]: Analyzing trace with hash 49329, now seen corresponding path program 1 times [2023-08-26 18:53:23,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:53:23,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701174210] [2023-08-26 18:53:23,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:53:23,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:53:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:53:23,163 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 18:53:23,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:53:23,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701174210] [2023-08-26 18:53:23,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701174210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:53:23,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:53:23,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:53:23,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634737122] [2023-08-26 18:53:23,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:53:23,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:53:23,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:53:23,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:53:23,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:53:23,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 384 [2023-08-26 18:53:23,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:23,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:53:23,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 384 [2023-08-26 18:53:23,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:53:38,387 INFO L124 PetriNetUnfolderBase]: 191588/265653 cut-off events. [2023-08-26 18:53:38,387 INFO L125 PetriNetUnfolderBase]: For 13211/13211 co-relation queries the response was YES. [2023-08-26 18:53:38,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546257 conditions, 265653 events. 191588/265653 cut-off events. For 13211/13211 co-relation queries the response was YES. Maximal size of possible extension queue 6560. Compared 1972608 event pairs, 176613 based on Foata normal form. 0/163782 useless extension candidates. Maximal degree in co-relation 546144. Up to 243466 conditions per place. [2023-08-26 18:53:39,648 INFO L140 encePairwiseOnDemand]: 380/384 looper letters, 114 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2023-08-26 18:53:39,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 123 transitions, 520 flow [2023-08-26 18:53:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:53:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:53:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2023-08-26 18:53:39,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2023-08-26 18:53:39,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2023-08-26 18:53:39,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2023-08-26 18:53:39,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:53:39,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2023-08-26 18:53:39,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:39,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:39,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:39,654 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 198 flow. Second operand 3 states and 534 transitions. [2023-08-26 18:53:39,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 123 transitions, 520 flow [2023-08-26 18:53:39,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 123 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:53:39,671 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 196 flow [2023-08-26 18:53:39,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2023-08-26 18:53:39,671 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -4 predicate places. [2023-08-26 18:53:39,671 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 196 flow [2023-08-26 18:53:39,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:39,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:53:39,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:53:39,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 18:53:39,672 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:53:39,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:53:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1646350390, now seen corresponding path program 1 times [2023-08-26 18:53:39,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:53:39,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626987393] [2023-08-26 18:53:39,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:53:39,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:53:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:53:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:53:39,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:53:39,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626987393] [2023-08-26 18:53:39,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626987393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:53:39,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823612304] [2023-08-26 18:53:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:53:39,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:53:39,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:53:39,727 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 18:53:39,729 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 18:53:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:53:39,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 18:53:39,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:53:39,805 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 18:53:39,832 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 18:53:39,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:53:39,865 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 18:53:39,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823612304] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:53:39,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:53:39,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-26 18:53:39,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597119979] [2023-08-26 18:53:39,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:53:39,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:53:39,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:53:39,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:53:39,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:53:39,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 384 [2023-08-26 18:53:39,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 135.71428571428572) internal successors, (950), 7 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:39,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:53:39,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 384 [2023-08-26 18:53:39,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:53:49,167 INFO L124 PetriNetUnfolderBase]: 121348/172444 cut-off events. [2023-08-26 18:53:49,167 INFO L125 PetriNetUnfolderBase]: For 14206/14206 co-relation queries the response was YES. [2023-08-26 18:53:49,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361786 conditions, 172444 events. 121348/172444 cut-off events. For 14206/14206 co-relation queries the response was YES. Maximal size of possible extension queue 4356. Compared 1351680 event pairs, 16 based on Foata normal form. 15/125338 useless extension candidates. Maximal degree in co-relation 330159. Up to 133078 conditions per place. [2023-08-26 18:53:50,013 INFO L140 encePairwiseOnDemand]: 380/384 looper letters, 184 selfloop transitions, 6 changer transitions 0/203 dead transitions. [2023-08-26 18:53:50,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 203 transitions, 832 flow [2023-08-26 18:53:50,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:53:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:53:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 998 transitions. [2023-08-26 18:53:50,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331597222222222 [2023-08-26 18:53:50,017 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 998 transitions. [2023-08-26 18:53:50,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 998 transitions. [2023-08-26 18:53:50,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:53:50,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 998 transitions. [2023-08-26 18:53:50,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 166.33333333333334) internal successors, (998), 6 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:50,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:50,023 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:50,023 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 196 flow. Second operand 6 states and 998 transitions. [2023-08-26 18:53:50,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 203 transitions, 832 flow [2023-08-26 18:53:52,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 203 transitions, 828 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:53:52,365 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 208 flow [2023-08-26 18:53:52,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2023-08-26 18:53:52,365 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -2 predicate places. [2023-08-26 18:53:52,366 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 208 flow [2023-08-26 18:53:52,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 135.71428571428572) internal successors, (950), 7 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:52,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:53:52,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:53:52,371 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 18:53:52,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:53:52,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:53:52,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:53:52,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1646124910, now seen corresponding path program 1 times [2023-08-26 18:53:52,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:53:52,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787942353] [2023-08-26 18:53:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:53:52,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:53:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:53:52,642 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 18:53:52,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:53:52,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787942353] [2023-08-26 18:53:52,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787942353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:53:52,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:53:52,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:53:52,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768272421] [2023-08-26 18:53:52,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:53:52,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:53:52,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:53:52,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:53:52,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:53:52,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 384 [2023-08-26 18:53:52,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:53:52,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:53:52,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 384 [2023-08-26 18:53:52,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:54:01,636 INFO L124 PetriNetUnfolderBase]: 121345/168613 cut-off events. [2023-08-26 18:54:01,636 INFO L125 PetriNetUnfolderBase]: For 22796/22796 co-relation queries the response was YES. [2023-08-26 18:54:01,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351479 conditions, 168613 events. 121345/168613 cut-off events. For 22796/22796 co-relation queries the response was YES. Maximal size of possible extension queue 3813. Compared 1178370 event pairs, 111057 based on Foata normal form. 3218/117556 useless extension candidates. Maximal degree in co-relation 103175. Up to 153791 conditions per place. [2023-08-26 18:54:02,653 INFO L140 encePairwiseOnDemand]: 376/384 looper letters, 103 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2023-08-26 18:54:02,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 112 transitions, 488 flow [2023-08-26 18:54:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:54:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:54:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 618 transitions. [2023-08-26 18:54:02,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40234375 [2023-08-26 18:54:02,655 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 618 transitions. [2023-08-26 18:54:02,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 618 transitions. [2023-08-26 18:54:02,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:54:02,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 618 transitions. [2023-08-26 18:54:02,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:02,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:02,659 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:02,659 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 208 flow. Second operand 4 states and 618 transitions. [2023-08-26 18:54:02,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 112 transitions, 488 flow [2023-08-26 18:54:02,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 112 transitions, 473 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 18:54:02,674 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 185 flow [2023-08-26 18:54:02,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2023-08-26 18:54:02,674 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -8 predicate places. [2023-08-26 18:54:02,674 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 185 flow [2023-08-26 18:54:02,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:02,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:54:02,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:54:02,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 18:54:02,675 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:54:02,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:54:02,675 INFO L85 PathProgramCache]: Analyzing trace with hash 509735507, now seen corresponding path program 1 times [2023-08-26 18:54:02,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:54:02,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464187692] [2023-08-26 18:54:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:54:02,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:54:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:54:02,738 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 18:54:02,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:54:02,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464187692] [2023-08-26 18:54:02,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464187692] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:54:02,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:54:02,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:54:02,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535142069] [2023-08-26 18:54:02,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:54:02,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:54:02,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:54:02,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:54:02,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:54:02,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 384 [2023-08-26 18:54:02,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:02,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:54:02,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 384 [2023-08-26 18:54:02,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:54:07,163 INFO L124 PetriNetUnfolderBase]: 53801/78602 cut-off events. [2023-08-26 18:54:07,163 INFO L125 PetriNetUnfolderBase]: For 5182/5182 co-relation queries the response was YES. [2023-08-26 18:54:07,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160474 conditions, 78602 events. 53801/78602 cut-off events. For 5182/5182 co-relation queries the response was YES. Maximal size of possible extension queue 1817. Compared 552170 event pairs, 43365 based on Foata normal form. 0/70075 useless extension candidates. Maximal degree in co-relation 122496. Up to 59847 conditions per place. [2023-08-26 18:54:07,450 INFO L140 encePairwiseOnDemand]: 358/384 looper letters, 108 selfloop transitions, 14 changer transitions 1/129 dead transitions. [2023-08-26 18:54:07,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 545 flow [2023-08-26 18:54:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:54:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:54:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 643 transitions. [2023-08-26 18:54:07,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186197916666667 [2023-08-26 18:54:07,452 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 643 transitions. [2023-08-26 18:54:07,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 643 transitions. [2023-08-26 18:54:07,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:54:07,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 643 transitions. [2023-08-26 18:54:07,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:07,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:07,456 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 384.0) internal successors, (1920), 5 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:07,456 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 185 flow. Second operand 4 states and 643 transitions. [2023-08-26 18:54:07,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 545 flow [2023-08-26 18:54:07,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 129 transitions, 542 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:54:07,609 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 326 flow [2023-08-26 18:54:07,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=326, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2023-08-26 18:54:07,609 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -4 predicate places. [2023-08-26 18:54:07,610 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 326 flow [2023-08-26 18:54:07,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:07,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:54:07,610 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-26 18:54:07,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 18:54:07,610 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:54:07,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:54:07,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1614526040, now seen corresponding path program 1 times [2023-08-26 18:54:07,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:54:07,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130925901] [2023-08-26 18:54:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:54:07,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:54:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:54:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:54:07,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:54:07,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130925901] [2023-08-26 18:54:07,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130925901] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:54:07,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196800729] [2023-08-26 18:54:07,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:54:07,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:54:07,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:54:07,649 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 18:54:07,662 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 18:54:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:54:07,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 18:54:07,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:54:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:54:07,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:54:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:54:07,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196800729] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:54:07,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:54:07,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-26 18:54:07,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878777118] [2023-08-26 18:54:07,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:54:07,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 18:54:07,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:54:07,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 18:54:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-26 18:54:07,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 384 [2023-08-26 18:54:07,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 326 flow. Second operand has 9 states, 9 states have (on average 174.33333333333334) internal successors, (1569), 9 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:07,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:54:07,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 384 [2023-08-26 18:54:07,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:54:08,674 INFO L124 PetriNetUnfolderBase]: 8370/12462 cut-off events. [2023-08-26 18:54:08,674 INFO L125 PetriNetUnfolderBase]: For 4586/5271 co-relation queries the response was YES. [2023-08-26 18:54:08,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29887 conditions, 12462 events. 8370/12462 cut-off events. For 4586/5271 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 74919 event pairs, 316 based on Foata normal form. 1254/13397 useless extension candidates. Maximal degree in co-relation 29879. Up to 8355 conditions per place. [2023-08-26 18:54:08,701 INFO L140 encePairwiseOnDemand]: 381/384 looper letters, 0 selfloop transitions, 0 changer transitions 95/95 dead transitions. [2023-08-26 18:54:08,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 95 transitions, 446 flow [2023-08-26 18:54:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:54:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:54:08,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1120 transitions. [2023-08-26 18:54:08,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2023-08-26 18:54:08,704 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1120 transitions. [2023-08-26 18:54:08,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1120 transitions. [2023-08-26 18:54:08,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:54:08,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1120 transitions. [2023-08-26 18:54:08,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.66666666666666) internal successors, (1120), 6 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:08,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:08,709 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 384.0) internal successors, (2688), 7 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:08,709 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 326 flow. Second operand 6 states and 1120 transitions. [2023-08-26 18:54:08,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 95 transitions, 446 flow [2023-08-26 18:54:08,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 95 transitions, 442 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 18:54:08,711 INFO L231 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2023-08-26 18:54:08,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2023-08-26 18:54:08,712 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -28 predicate places. [2023-08-26 18:54:08,712 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2023-08-26 18:54:08,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 174.33333333333334) internal successors, (1569), 9 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:08,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 39 remaining) [2023-08-26 18:54:08,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2023-08-26 18:54:08,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2023-08-26 18:54:08,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2023-08-26 18:54:08,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2023-08-26 18:54:08,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2023-08-26 18:54:08,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2023-08-26 18:54:08,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2023-08-26 18:54:08,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2023-08-26 18:54:08,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2023-08-26 18:54:08,713 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2023-08-26 18:54:08,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2023-08-26 18:54:08,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2023-08-26 18:54:08,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2023-08-26 18:54:08,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2023-08-26 18:54:08,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2023-08-26 18:54:08,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 39 remaining) [2023-08-26 18:54:08,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2023-08-26 18:54:08,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2023-08-26 18:54:08,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2023-08-26 18:54:08,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2023-08-26 18:54:08,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2023-08-26 18:54:08,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2023-08-26 18:54:08,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2023-08-26 18:54:08,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2023-08-26 18:54:08,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2023-08-26 18:54:08,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2023-08-26 18:54:08,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 39 remaining) [2023-08-26 18:54:08,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2023-08-26 18:54:08,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (9 of 39 remaining) [2023-08-26 18:54:08,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2023-08-26 18:54:08,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2023-08-26 18:54:08,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2023-08-26 18:54:08,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2023-08-26 18:54:08,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2023-08-26 18:54:08,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2023-08-26 18:54:08,716 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2023-08-26 18:54:08,716 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2023-08-26 18:54:08,716 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 39 remaining) [2023-08-26 18:54:08,724 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 18:54:08,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 18:54:08,920 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-26 18:54:08,921 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-26 18:54:08,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 212 transitions, 454 flow [2023-08-26 18:54:08,953 INFO L124 PetriNetUnfolderBase]: 54/435 cut-off events. [2023-08-26 18:54:08,954 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 18:54:08,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 435 events. 54/435 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1720 event pairs, 1 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 293. Up to 16 conditions per place. [2023-08-26 18:54:08,956 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 212 transitions, 454 flow [2023-08-26 18:54:08,958 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 212 transitions, 454 flow [2023-08-26 18:54:08,958 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:54:08,958 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 212 transitions, 454 flow [2023-08-26 18:54:08,958 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 212 transitions, 454 flow [2023-08-26 18:54:08,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 212 transitions, 454 flow [2023-08-26 18:54:08,988 INFO L124 PetriNetUnfolderBase]: 54/435 cut-off events. [2023-08-26 18:54:08,989 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 18:54:08,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 435 events. 54/435 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1720 event pairs, 1 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 293. Up to 16 conditions per place. [2023-08-26 18:54:08,998 INFO L119 LiptonReduction]: Number of co-enabled transitions 23280 [2023-08-26 18:54:12,307 INFO L134 LiptonReduction]: Checked pairs total: 62241 [2023-08-26 18:54:12,307 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-08-26 18:54:12,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 18:54:12,309 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;@60c5b899, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:54:12,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 18:54:12,317 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:54:12,318 INFO L124 PetriNetUnfolderBase]: 24/135 cut-off events. [2023-08-26 18:54:12,318 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 18:54:12,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:54:12,318 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 18:54:12,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 18:54:12,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:54:12,318 INFO L85 PathProgramCache]: Analyzing trace with hash 204630184, now seen corresponding path program 1 times [2023-08-26 18:54:12,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:54:12,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313412124] [2023-08-26 18:54:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:54:12,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:54:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:54:12,330 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 18:54:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:54:12,340 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 18:54:12,340 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 18:54:12,340 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 18:54:12,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 18:54:12,341 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 18:54:12,341 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-26 18:54:12,341 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 18:54:12,341 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 18:54:12,361 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 18:54:12,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 254 transitions, 552 flow [2023-08-26 18:54:12,428 INFO L124 PetriNetUnfolderBase]: 86/661 cut-off events. [2023-08-26 18:54:12,428 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 18:54:12,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 661 events. 86/661 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2892 event pairs, 6 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 455. Up to 32 conditions per place. [2023-08-26 18:54:12,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 254 transitions, 552 flow [2023-08-26 18:54:12,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 254 transitions, 552 flow [2023-08-26 18:54:12,439 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:54:12,440 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 254 transitions, 552 flow [2023-08-26 18:54:12,440 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 254 transitions, 552 flow [2023-08-26 18:54:12,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 254 transitions, 552 flow [2023-08-26 18:54:12,500 INFO L124 PetriNetUnfolderBase]: 86/661 cut-off events. [2023-08-26 18:54:12,500 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 18:54:12,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 661 events. 86/661 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2892 event pairs, 6 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 455. Up to 32 conditions per place. [2023-08-26 18:54:12,522 INFO L119 LiptonReduction]: Number of co-enabled transitions 37920 [2023-08-26 18:54:16,188 INFO L134 LiptonReduction]: Checked pairs total: 110050 [2023-08-26 18:54:16,189 INFO L136 LiptonReduction]: Total number of compositions: 209 [2023-08-26 18:54:16,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:54:16,190 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;@60c5b899, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:54:16,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-08-26 18:54:16,191 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:54:16,191 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 18:54:16,191 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:54:16,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:54:16,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:54:16,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-26 18:54:16,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:54:16,191 INFO L85 PathProgramCache]: Analyzing trace with hash 71087, now seen corresponding path program 1 times [2023-08-26 18:54:16,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:54:16,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528944975] [2023-08-26 18:54:16,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:54:16,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:54:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:54:16,216 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 18:54:16,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:54:16,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528944975] [2023-08-26 18:54:16,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528944975] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:54:16,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:54:16,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:54:16,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660144746] [2023-08-26 18:54:16,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:54:16,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:54:16,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:54:16,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:54:16,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:54:16,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 463 [2023-08-26 18:54:16,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 131 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:54:16,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:54:16,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 463 [2023-08-26 18:54:16,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand