/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:38:59,686 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:38:59,760 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 12:38:59,764 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:38:59,765 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:38:59,794 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:38:59,795 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:38:59,800 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:38:59,801 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:38:59,804 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:38:59,804 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:38:59,805 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:38:59,805 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:38:59,805 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:38:59,806 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:38:59,806 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:38:59,806 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:38:59,806 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:38:59,807 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:38:59,807 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:38:59,807 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:38:59,808 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:38:59,808 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:38:59,809 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:38:59,809 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:38:59,809 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:38:59,810 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:38:59,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:38:59,810 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:38:59,810 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:38:59,811 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:38:59,811 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:38:59,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:38:59,812 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:38:59,812 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:38:59,812 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:39:00,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:39:00,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:39:00,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:39:00,120 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:39:00,120 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:39:00,121 INFO L431 ainManager$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 12:39:01,251 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:39:01,536 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:39:01,537 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-08-26 12:39:01,550 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61682ca89/99258ba712394fdab2d4dcb8f97b7fbf/FLAGa8550d514 [2023-08-26 12:39:01,566 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61682ca89/99258ba712394fdab2d4dcb8f97b7fbf [2023-08-26 12:39:01,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:39:01,571 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:39:01,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:39:01,573 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:39:01,576 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:39:01,577 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:39:01" (1/1) ... [2023-08-26 12:39:01,578 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5239d974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:39:01, skipping insertion in model container [2023-08-26 12:39:01,578 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:39:01" (1/1) ... [2023-08-26 12:39:01,625 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:39:01,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:39:01,945 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:39:01,972 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:39:01,974 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:39:02,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:39:02,035 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:39:02,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:39:02 WrapperNode [2023-08-26 12:39:02,036 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:39:02,037 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:39:02,037 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:39:02,037 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:39:02,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:39:02" (1/1) ... [2023-08-26 12:39:02,054 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:39:02" (1/1) ... [2023-08-26 12:39:02,075 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2023-08-26 12:39:02,075 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:39:02,076 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:39:02,076 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:39:02,076 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:39:02,082 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:39:02" (1/1) ... [2023-08-26 12:39:02,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:39:02" (1/1) ... [2023-08-26 12:39:02,085 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:39:02" (1/1) ... [2023-08-26 12:39:02,085 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:39:02" (1/1) ... [2023-08-26 12:39:02,091 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:39:02" (1/1) ... [2023-08-26 12:39:02,095 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:39:02" (1/1) ... [2023-08-26 12:39:02,096 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:39:02" (1/1) ... [2023-08-26 12:39:02,097 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:39:02" (1/1) ... [2023-08-26 12:39:02,099 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:39:02,100 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:39:02,100 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:39:02,100 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:39:02,101 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:39:02" (1/1) ... [2023-08-26 12:39:02,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:39:02,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:39:02,129 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 12:39:02,152 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 12:39:02,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:39:02,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:39:02,166 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:39:02,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:39:02,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:39:02,167 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 12:39:02,167 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 12:39:02,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:39:02,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:39:02,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:39:02,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:39:02,168 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 12:39:02,289 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:39:02,291 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:39:02,558 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:39:02,569 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:39:02,569 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-26 12:39:02,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:39:02 BoogieIcfgContainer [2023-08-26 12:39:02,572 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:39:02,574 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:39:02,575 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:39:02,577 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:39:02,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:39:01" (1/3) ... [2023-08-26 12:39:02,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37793f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:39:02, skipping insertion in model container [2023-08-26 12:39:02,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:39:02" (2/3) ... [2023-08-26 12:39:02,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37793f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:39:02, skipping insertion in model container [2023-08-26 12:39:02,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:39:02" (3/3) ... [2023-08-26 12:39:02,580 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2023-08-26 12:39:02,594 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:39:02,595 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-26 12:39:02,595 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:39:02,672 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 12:39:02,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 128 transitions, 264 flow [2023-08-26 12:39:02,815 INFO L124 PetriNetUnfolderBase]: 19/172 cut-off events. [2023-08-26 12:39:02,816 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:39:02,821 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 12:39:02,821 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 128 transitions, 264 flow [2023-08-26 12:39:02,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 128 transitions, 264 flow [2023-08-26 12:39:02,831 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:39:02,843 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 128 transitions, 264 flow [2023-08-26 12:39:02,846 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 128 transitions, 264 flow [2023-08-26 12:39:02,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 128 transitions, 264 flow [2023-08-26 12:39:02,894 INFO L124 PetriNetUnfolderBase]: 19/172 cut-off events. [2023-08-26 12:39:02,894 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:39:02,895 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 12:39:02,900 INFO L119 LiptonReduction]: Number of co-enabled transitions 4000 [2023-08-26 12:39:06,211 INFO L134 LiptonReduction]: Checked pairs total: 7932 [2023-08-26 12:39:06,211 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-26 12:39:06,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:39:06,226 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;@57d8b0f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:39:06,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-08-26 12:39:06,228 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:39:06,228 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 12:39:06,229 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:39:06,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:06,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:39:06,230 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-26 12:39:06,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:06,233 INFO L85 PathProgramCache]: Analyzing trace with hash 15905, now seen corresponding path program 1 times [2023-08-26 12:39:06,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:06,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740676235] [2023-08-26 12:39:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:06,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:06,431 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 12:39:06,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:39:06,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740676235] [2023-08-26 12:39:06,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740676235] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:39:06,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:39:06,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:39:06,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127903502] [2023-08-26 12:39:06,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:39:06,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:39:06,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:39:06,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:39:06,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:39:06,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 242 [2023-08-26 12:39:06,465 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 12:39:06,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:39:06,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 242 [2023-08-26 12:39:06,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:39:06,617 INFO L124 PetriNetUnfolderBase]: 196/441 cut-off events. [2023-08-26 12:39:06,617 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:39:06,618 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 12:39:06,621 INFO L140 encePairwiseOnDemand]: 227/242 looper letters, 42 selfloop transitions, 2 changer transitions 3/50 dead transitions. [2023-08-26 12:39:06,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 202 flow [2023-08-26 12:39:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:39:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:39:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-08-26 12:39:06,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453168044077135 [2023-08-26 12:39:06,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-08-26 12:39:06,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-08-26 12:39:06,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:39:06,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-08-26 12:39:06,641 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 12:39:06,645 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 12:39:06,645 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 12:39:06,646 INFO L175 Difference]: Start difference. First operand has 41 places, 48 transitions, 104 flow. Second operand 3 states and 329 transitions. [2023-08-26 12:39:06,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 202 flow [2023-08-26 12:39:06,649 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 12:39:06,650 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 82 flow [2023-08-26 12:39:06,652 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 12:39:06,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2023-08-26 12:39:06,655 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 82 flow [2023-08-26 12:39:06,655 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 12:39:06,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:06,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:39:06,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:39:06,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-26 12:39:06,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash 15904, now seen corresponding path program 1 times [2023-08-26 12:39:06,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:06,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482486200] [2023-08-26 12:39:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:06,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:06,768 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 12:39:06,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:39:06,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482486200] [2023-08-26 12:39:06,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482486200] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:39:06,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:39:06,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:39:06,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594353175] [2023-08-26 12:39:06,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:39:06,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:39:06,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:39:06,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:39:06,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:39:06,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 242 [2023-08-26 12:39:06,773 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 12:39:06,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:39:06,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 242 [2023-08-26 12:39:06,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:39:06,875 INFO L124 PetriNetUnfolderBase]: 156/363 cut-off events. [2023-08-26 12:39:06,875 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:39:06,876 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 12:39:06,878 INFO L140 encePairwiseOnDemand]: 238/242 looper letters, 40 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-26 12:39:06,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 192 flow [2023-08-26 12:39:06,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:39:06,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:39:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-08-26 12:39:06,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39944903581267216 [2023-08-26 12:39:06,884 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-08-26 12:39:06,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-08-26 12:39:06,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:39:06,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-08-26 12:39:06,888 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 12:39:06,891 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 12:39:06,891 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 12:39:06,892 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 82 flow. Second operand 3 states and 290 transitions. [2023-08-26 12:39:06,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 192 flow [2023-08-26 12:39:06,893 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 12:39:06,894 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 88 flow [2023-08-26 12:39:06,894 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 12:39:06,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-08-26 12:39:06,896 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 88 flow [2023-08-26 12:39:06,897 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 12:39:06,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:06,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:39:06,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:39:06,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-26 12:39:06,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:06,901 INFO L85 PathProgramCache]: Analyzing trace with hash 474120046, now seen corresponding path program 1 times [2023-08-26 12:39:06,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:06,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114550216] [2023-08-26 12:39:06,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:06,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:07,040 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 12:39:07,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:39:07,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114550216] [2023-08-26 12:39:07,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114550216] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:39:07,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626308848] [2023-08-26 12:39:07,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:07,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:39:07,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:39:07,044 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 12:39:07,092 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 12:39:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:07,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:39:07,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:39:07,233 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 12:39:07,291 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 12:39:07,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:39:07,346 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 12:39:07,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626308848] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:39:07,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:39:07,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:39:07,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269371936] [2023-08-26 12:39:07,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:39:07,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:39:07,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:39:07,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:39:07,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:39:07,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 242 [2023-08-26 12:39:07,351 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 12:39:07,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:39:07,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 242 [2023-08-26 12:39:07,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:39:07,435 INFO L124 PetriNetUnfolderBase]: 24/83 cut-off events. [2023-08-26 12:39:07,435 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 12:39:07,436 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 12:39:07,436 INFO L140 encePairwiseOnDemand]: 238/242 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-26 12:39:07,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 139 flow [2023-08-26 12:39:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:39:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:39:07,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 359 transitions. [2023-08-26 12:39:07,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37086776859504134 [2023-08-26 12:39:07,438 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 359 transitions. [2023-08-26 12:39:07,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 359 transitions. [2023-08-26 12:39:07,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:39:07,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 359 transitions. [2023-08-26 12:39:07,440 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 12:39:07,442 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 12:39:07,442 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 12:39:07,443 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 88 flow. Second operand 4 states and 359 transitions. [2023-08-26 12:39:07,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 139 flow [2023-08-26 12:39:07,444 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 12:39:07,445 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 53 flow [2023-08-26 12:39:07,445 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=53, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-26 12:39:07,446 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -13 predicate places. [2023-08-26 12:39:07,446 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 53 flow [2023-08-26 12:39:07,447 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 12:39:07,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:07,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:39:07,460 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 12:39:07,653 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 12:39:07,653 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-26 12:39:07,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:07,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1812793205, now seen corresponding path program 1 times [2023-08-26 12:39:07,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:07,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015073742] [2023-08-26 12:39:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:07,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:07,877 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 12:39:07,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:39:07,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015073742] [2023-08-26 12:39:07,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015073742] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:39:07,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:39:07,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:39:07,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126202966] [2023-08-26 12:39:07,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:39:07,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:39:07,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:39:07,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:39:07,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:39:07,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 242 [2023-08-26 12:39:07,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 53 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 12:39:07,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:39:07,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 242 [2023-08-26 12:39:07,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:39:07,907 INFO L124 PetriNetUnfolderBase]: 26/76 cut-off events. [2023-08-26 12:39:07,907 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-26 12:39:07,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 76 events. 26/76 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 179 event pairs, 26 based on Foata normal form. 2/64 useless extension candidates. Maximal degree in co-relation 150. Up to 70 conditions per place. [2023-08-26 12:39:07,908 INFO L140 encePairwiseOnDemand]: 239/242 looper letters, 16 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-26 12:39:07,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 83 flow [2023-08-26 12:39:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:39:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:39:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-08-26 12:39:07,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3650137741046832 [2023-08-26 12:39:07,910 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-08-26 12:39:07,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-08-26 12:39:07,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:39:07,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-08-26 12:39:07,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:07,912 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 12:39:07,913 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 12:39:07,913 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 53 flow. Second operand 3 states and 265 transitions. [2023-08-26 12:39:07,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 83 flow [2023-08-26 12:39:07,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 20 transitions, 80 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:39:07,914 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 48 flow [2023-08-26 12:39:07,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-08-26 12:39:07,914 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -15 predicate places. [2023-08-26 12:39:07,915 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 48 flow [2023-08-26 12:39:07,915 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 12:39:07,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:07,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 12:39:07,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:39:07,915 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-26 12:39:07,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:07,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1812819859, now seen corresponding path program 1 times [2023-08-26 12:39:07,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:07,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549518853] [2023-08-26 12:39:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:07,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:39:07,939 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:39:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:39:07,958 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:39:07,959 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:39:07,960 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (23 of 24 remaining) [2023-08-26 12:39:07,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 24 remaining) [2023-08-26 12:39:07,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 24 remaining) [2023-08-26 12:39:07,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 24 remaining) [2023-08-26 12:39:07,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 24 remaining) [2023-08-26 12:39:07,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 24 remaining) [2023-08-26 12:39:07,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 24 remaining) [2023-08-26 12:39:07,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (16 of 24 remaining) [2023-08-26 12:39:07,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 24 remaining) [2023-08-26 12:39:07,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 24 remaining) [2023-08-26 12:39:07,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 24 remaining) [2023-08-26 12:39:07,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 24 remaining) [2023-08-26 12:39:07,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 24 remaining) [2023-08-26 12:39:07,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 24 remaining) [2023-08-26 12:39:07,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 24 remaining) [2023-08-26 12:39:07,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 24 remaining) [2023-08-26 12:39:07,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 24 remaining) [2023-08-26 12:39:07,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 24 remaining) [2023-08-26 12:39:07,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 24 remaining) [2023-08-26 12:39:07,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 24 remaining) [2023-08-26 12:39:07,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 24 remaining) [2023-08-26 12:39:07,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 24 remaining) [2023-08-26 12:39:07,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 24 remaining) [2023-08-26 12:39:07,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 24 remaining) [2023-08-26 12:39:07,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:39:07,965 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 12:39:07,966 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:39:07,967 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 12:39:07,986 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 12:39:07,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 170 transitions, 358 flow [2023-08-26 12:39:08,011 INFO L124 PetriNetUnfolderBase]: 34/285 cut-off events. [2023-08-26 12:39:08,011 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:39:08,013 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 12:39:08,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 170 transitions, 358 flow [2023-08-26 12:39:08,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 170 transitions, 358 flow [2023-08-26 12:39:08,016 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:39:08,016 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 170 transitions, 358 flow [2023-08-26 12:39:08,016 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 170 transitions, 358 flow [2023-08-26 12:39:08,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 170 transitions, 358 flow [2023-08-26 12:39:08,039 INFO L124 PetriNetUnfolderBase]: 34/285 cut-off events. [2023-08-26 12:39:08,039 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:39:08,040 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 12:39:08,047 INFO L119 LiptonReduction]: Number of co-enabled transitions 12080 [2023-08-26 12:39:11,473 INFO L134 LiptonReduction]: Checked pairs total: 29680 [2023-08-26 12:39:11,474 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-26 12:39:11,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:39:11,476 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;@57d8b0f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:39:11,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-08-26 12:39:11,478 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:39:11,478 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-08-26 12:39:11,478 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:39:11,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:11,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:39:11,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:39:11,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:11,479 INFO L85 PathProgramCache]: Analyzing trace with hash 27396, now seen corresponding path program 1 times [2023-08-26 12:39:11,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:11,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865006247] [2023-08-26 12:39:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:11,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:11,531 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 12:39:11,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:39:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865006247] [2023-08-26 12:39:11,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865006247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:39:11,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:39:11,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:39:11,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345088759] [2023-08-26 12:39:11,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:39:11,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:39:11,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:39:11,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:39:11,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:39:11,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 317 [2023-08-26 12:39:11,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 77 transitions, 172 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 12:39:11,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:39:11,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 317 [2023-08-26 12:39:11,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:39:12,405 INFO L124 PetriNetUnfolderBase]: 6834/11363 cut-off events. [2023-08-26 12:39:12,406 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-08-26 12:39:12,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22264 conditions, 11363 events. 6834/11363 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 79424 event pairs, 3234 based on Foata normal form. 503/7614 useless extension candidates. Maximal degree in co-relation 2386. Up to 10771 conditions per place. [2023-08-26 12:39:12,482 INFO L140 encePairwiseOnDemand]: 294/317 looper letters, 64 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-26 12:39:12,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 75 transitions, 300 flow [2023-08-26 12:39:12,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:39:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:39:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2023-08-26 12:39:12,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405888538380652 [2023-08-26 12:39:12,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2023-08-26 12:39:12,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2023-08-26 12:39:12,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:39:12,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2023-08-26 12:39:12,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 12:39:12,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:12,488 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:12,488 INFO L175 Difference]: Start difference. First operand has 65 places, 77 transitions, 172 flow. Second operand 3 states and 419 transitions. [2023-08-26 12:39:12,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 75 transitions, 300 flow [2023-08-26 12:39:12,492 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 12:39:12,493 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 148 flow [2023-08-26 12:39:12,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, 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 12:39:12,497 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-08-26 12:39:12,497 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 148 flow [2023-08-26 12:39:12,498 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 12:39:12,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:12,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:39:12,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:39:12,498 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:39:12,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash 27395, now seen corresponding path program 1 times [2023-08-26 12:39:12,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:12,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166664841] [2023-08-26 12:39:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:12,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:12,524 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 12:39:12,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:39:12,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166664841] [2023-08-26 12:39:12,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166664841] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:39:12,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:39:12,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:39:12,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727786606] [2023-08-26 12:39:12,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:39:12,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:39:12,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:39:12,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:39:12,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:39:12,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 317 [2023-08-26 12:39:12,528 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 12:39:12,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:39:12,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 317 [2023-08-26 12:39:12,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:39:13,322 INFO L124 PetriNetUnfolderBase]: 6782/11018 cut-off events. [2023-08-26 12:39:13,323 INFO L125 PetriNetUnfolderBase]: For 631/631 co-relation queries the response was YES. [2023-08-26 12:39:13,337 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 443. Compared 74188 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 12:39:13,383 INFO L140 encePairwiseOnDemand]: 313/317 looper letters, 78 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-26 12:39:13,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 364 flow [2023-08-26 12:39:13,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:39:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:39:13,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-08-26 12:39:13,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416403785488959 [2023-08-26 12:39:13,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-08-26 12:39:13,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-08-26 12:39:13,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:39:13,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-08-26 12:39:13,387 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 12:39:13,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:13,389 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:13,389 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 148 flow. Second operand 3 states and 420 transitions. [2023-08-26 12:39:13,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 364 flow [2023-08-26 12:39:13,391 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 12:39:13,393 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 146 flow [2023-08-26 12:39:13,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, 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 12:39:13,395 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-08-26 12:39:13,395 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 146 flow [2023-08-26 12:39:13,395 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 12:39:13,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:13,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:39:13,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:39:13,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:39:13,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:13,398 INFO L85 PathProgramCache]: Analyzing trace with hash -447159538, now seen corresponding path program 1 times [2023-08-26 12:39:13,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:13,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796800877] [2023-08-26 12:39:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:13,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:13,483 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 12:39:13,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:39:13,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796800877] [2023-08-26 12:39:13,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796800877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:39:13,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:39:13,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:39:13,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846801760] [2023-08-26 12:39:13,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:39:13,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:39:13,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:39:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:39:13,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:39:13,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 317 [2023-08-26 12:39:13,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:13,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:39:13,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 317 [2023-08-26 12:39:13,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:39:14,094 INFO L124 PetriNetUnfolderBase]: 5176/8482 cut-off events. [2023-08-26 12:39:14,094 INFO L125 PetriNetUnfolderBase]: For 667/667 co-relation queries the response was YES. [2023-08-26 12:39:14,106 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 322. Compared 54046 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 12:39:14,141 INFO L140 encePairwiseOnDemand]: 311/317 looper letters, 70 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-26 12:39:14,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 334 flow [2023-08-26 12:39:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:39:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:39:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 495 transitions. [2023-08-26 12:39:14,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39037854889589907 [2023-08-26 12:39:14,144 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 495 transitions. [2023-08-26 12:39:14,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 495 transitions. [2023-08-26 12:39:14,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:39:14,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 495 transitions. [2023-08-26 12:39:14,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:14,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:14,148 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:14,148 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 146 flow. Second operand 4 states and 495 transitions. [2023-08-26 12:39:14,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 334 flow [2023-08-26 12:39:14,152 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 12:39:14,153 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 138 flow [2023-08-26 12:39:14,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, 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 12:39:14,154 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-08-26 12:39:14,154 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 138 flow [2023-08-26 12:39:14,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:14,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:14,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:39:14,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:39:14,155 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:39:14,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:14,155 INFO L85 PathProgramCache]: Analyzing trace with hash -447348942, now seen corresponding path program 1 times [2023-08-26 12:39:14,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:14,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522717371] [2023-08-26 12:39:14,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:14,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:14,210 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 12:39:14,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:39:14,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522717371] [2023-08-26 12:39:14,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522717371] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:39:14,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984614852] [2023-08-26 12:39:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:14,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:39:14,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:39:14,212 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 12:39:14,241 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 12:39:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:14,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:39:14,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:39:14,289 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 12:39:14,329 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 12:39:14,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:39:14,366 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 12:39:14,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984614852] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:39:14,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:39:14,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:39:14,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968133029] [2023-08-26 12:39:14,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:39:14,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:39:14,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:39:14,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:39:14,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:39:14,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 317 [2023-08-26 12:39:14,370 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 12:39:14,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:39:14,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 317 [2023-08-26 12:39:14,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:39:14,586 INFO L124 PetriNetUnfolderBase]: 804/1577 cut-off events. [2023-08-26 12:39:14,586 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2023-08-26 12:39:14,589 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 9335 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 12:39:14,594 INFO L140 encePairwiseOnDemand]: 313/317 looper letters, 65 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-08-26 12:39:14,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 308 flow [2023-08-26 12:39:14,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:39:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:39:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 612 transitions. [2023-08-26 12:39:14,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861198738170347 [2023-08-26 12:39:14,596 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 612 transitions. [2023-08-26 12:39:14,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 612 transitions. [2023-08-26 12:39:14,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:39:14,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 612 transitions. [2023-08-26 12:39:14,598 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 12:39:14,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:14,601 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:14,601 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 138 flow. Second operand 5 states and 612 transitions. [2023-08-26 12:39:14,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 308 flow [2023-08-26 12:39:14,602 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 12:39:14,603 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 99 flow [2023-08-26 12:39:14,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, 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 12:39:14,604 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -16 predicate places. [2023-08-26 12:39:14,604 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 99 flow [2023-08-26 12:39:14,604 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 12:39:14,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:14,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:39:14,612 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 12:39:14,812 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,SelfDestructingSolverStorable8 [2023-08-26 12:39:14,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:39:14,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:14,813 INFO L85 PathProgramCache]: Analyzing trace with hash -977045533, now seen corresponding path program 1 times [2023-08-26 12:39:14,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:14,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805773388] [2023-08-26 12:39:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:14,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:14,866 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 12:39:14,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:39:14,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805773388] [2023-08-26 12:39:14,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805773388] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:39:14,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:39:14,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:39:14,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805764210] [2023-08-26 12:39:14,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:39:14,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:39:14,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:39:14,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:39:14,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:39:14,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 317 [2023-08-26 12:39:14,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 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 12:39:14,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:39:14,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 317 [2023-08-26 12:39:14,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:39:14,963 INFO L124 PetriNetUnfolderBase]: 468/858 cut-off events. [2023-08-26 12:39:14,963 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2023-08-26 12:39:14,964 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 12:39:14,966 INFO L140 encePairwiseOnDemand]: 308/317 looper letters, 23 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-26 12:39:14,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 30 transitions, 131 flow [2023-08-26 12:39:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:39:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:39:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-08-26 12:39:14,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35751840168243953 [2023-08-26 12:39:14,968 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-08-26 12:39:14,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-08-26 12:39:14,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:39:14,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-08-26 12:39:14,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:14,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:14,971 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:14,971 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 99 flow. Second operand 3 states and 340 transitions. [2023-08-26 12:39:14,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 30 transitions, 131 flow [2023-08-26 12:39:14,972 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 12:39:14,973 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 78 flow [2023-08-26 12:39:14,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-26 12:39:14,973 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -25 predicate places. [2023-08-26 12:39:14,973 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 78 flow [2023-08-26 12:39:14,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 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 12:39:14,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:14,974 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 12:39:14,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:39:14,974 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:39:14,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:14,975 INFO L85 PathProgramCache]: Analyzing trace with hash -922887708, now seen corresponding path program 1 times [2023-08-26 12:39:14,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:14,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601385439] [2023-08-26 12:39:14,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:14,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:39:14,985 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:39:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:39:14,995 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:39:14,995 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:39:14,996 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (31 of 32 remaining) [2023-08-26 12:39:14,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 32 remaining) [2023-08-26 12:39:14,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 32 remaining) [2023-08-26 12:39:14,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 32 remaining) [2023-08-26 12:39:14,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 32 remaining) [2023-08-26 12:39:14,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 32 remaining) [2023-08-26 12:39:14,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 32 remaining) [2023-08-26 12:39:14,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (24 of 32 remaining) [2023-08-26 12:39:14,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 32 remaining) [2023-08-26 12:39:14,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 32 remaining) [2023-08-26 12:39:14,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 32 remaining) [2023-08-26 12:39:14,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 32 remaining) [2023-08-26 12:39:14,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 32 remaining) [2023-08-26 12:39:14,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 32 remaining) [2023-08-26 12:39:14,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 32 remaining) [2023-08-26 12:39:14,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 32 remaining) [2023-08-26 12:39:14,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 32 remaining) [2023-08-26 12:39:14,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 32 remaining) [2023-08-26 12:39:14,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 32 remaining) [2023-08-26 12:39:14,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 32 remaining) [2023-08-26 12:39:14,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 32 remaining) [2023-08-26 12:39:14,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 32 remaining) [2023-08-26 12:39:14,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 32 remaining) [2023-08-26 12:39:14,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 32 remaining) [2023-08-26 12:39:14,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 32 remaining) [2023-08-26 12:39:14,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 32 remaining) [2023-08-26 12:39:14,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 32 remaining) [2023-08-26 12:39:14,998 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 32 remaining) [2023-08-26 12:39:14,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 32 remaining) [2023-08-26 12:39:14,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 32 remaining) [2023-08-26 12:39:14,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 32 remaining) [2023-08-26 12:39:14,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 32 remaining) [2023-08-26 12:39:14,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 12:39:14,999 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-26 12:39:15,000 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:39:15,000 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 12:39:15,020 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 12:39:15,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 212 transitions, 454 flow [2023-08-26 12:39:15,060 INFO L124 PetriNetUnfolderBase]: 54/435 cut-off events. [2023-08-26 12:39:15,060 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:39:15,064 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 12:39:15,064 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 212 transitions, 454 flow [2023-08-26 12:39:15,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 212 transitions, 454 flow [2023-08-26 12:39:15,068 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:39:15,068 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 212 transitions, 454 flow [2023-08-26 12:39:15,068 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 212 transitions, 454 flow [2023-08-26 12:39:15,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 212 transitions, 454 flow [2023-08-26 12:39:15,105 INFO L124 PetriNetUnfolderBase]: 54/435 cut-off events. [2023-08-26 12:39:15,105 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:39:15,110 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 12:39:15,125 INFO L119 LiptonReduction]: Number of co-enabled transitions 23280 [2023-08-26 12:39:18,832 INFO L134 LiptonReduction]: Checked pairs total: 69027 [2023-08-26 12:39:18,832 INFO L136 LiptonReduction]: Total number of compositions: 176 [2023-08-26 12:39:18,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:39:18,834 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;@57d8b0f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:39:18,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2023-08-26 12:39:18,836 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:39:18,836 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 12:39:18,836 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:39:18,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:18,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:39:18,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:39:18,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:18,836 INFO L85 PathProgramCache]: Analyzing trace with hash 41135, now seen corresponding path program 1 times [2023-08-26 12:39:18,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:18,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940615782] [2023-08-26 12:39:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:18,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:18,856 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 12:39:18,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:39:18,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940615782] [2023-08-26 12:39:18,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940615782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:39:18,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:39:18,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:39:18,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436094171] [2023-08-26 12:39:18,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:39:18,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:39:18,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:39:18,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:39:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:39:18,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 388 [2023-08-26 12:39:18,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 238 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 12:39:18,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:39:18,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 388 [2023-08-26 12:39:18,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:39:34,557 INFO L124 PetriNetUnfolderBase]: 191589/265691 cut-off events. [2023-08-26 12:39:34,557 INFO L125 PetriNetUnfolderBase]: For 3442/3442 co-relation queries the response was YES. [2023-08-26 12:39:35,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531548 conditions, 265691 events. 191589/265691 cut-off events. For 3442/3442 co-relation queries the response was YES. Maximal size of possible extension queue 6705. Compared 1982042 event pairs, 176613 based on Foata normal form. 12517/171414 useless extension candidates. Maximal degree in co-relation 130143. Up to 243474 conditions per place. [2023-08-26 12:39:36,102 INFO L140 encePairwiseOnDemand]: 357/388 looper letters, 113 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2023-08-26 12:39:36,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 122 transitions, 504 flow [2023-08-26 12:39:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:39:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:39:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2023-08-26 12:39:36,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025773195876289 [2023-08-26 12:39:36,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2023-08-26 12:39:36,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2023-08-26 12:39:36,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:39:36,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2023-08-26 12:39:36,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:36,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:36,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:36,110 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 238 flow. Second operand 3 states and 585 transitions. [2023-08-26 12:39:36,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 122 transitions, 504 flow [2023-08-26 12:39:36,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 122 transitions, 504 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:39:36,114 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 184 flow [2023-08-26 12:39:36,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2023-08-26 12:39:36,116 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -6 predicate places. [2023-08-26 12:39:36,116 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 184 flow [2023-08-26 12:39:36,116 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 12:39:36,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:36,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:39:36,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:39:36,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:39:36,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:36,117 INFO L85 PathProgramCache]: Analyzing trace with hash 41136, now seen corresponding path program 1 times [2023-08-26 12:39:36,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:36,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312414075] [2023-08-26 12:39:36,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:36,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:36,156 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 12:39:36,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:39:36,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312414075] [2023-08-26 12:39:36,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312414075] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:39:36,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:39:36,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:39:36,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895569533] [2023-08-26 12:39:36,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:39:36,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:39:36,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:39:36,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:39:36,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:39:36,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 388 [2023-08-26 12:39:36,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 184 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 12:39:36,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:39:36,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 388 [2023-08-26 12:39:36,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:39:47,377 INFO L124 PetriNetUnfolderBase]: 130657/187888 cut-off events. [2023-08-26 12:39:47,377 INFO L125 PetriNetUnfolderBase]: For 5968/5968 co-relation queries the response was YES. [2023-08-26 12:39:47,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373997 conditions, 187888 events. 130657/187888 cut-off events. For 5968/5968 co-relation queries the response was YES. Maximal size of possible extension queue 4777. Compared 1447101 event pairs, 85055 based on Foata normal form. 0/131263 useless extension candidates. Maximal degree in co-relation 341922. Up to 180443 conditions per place. [2023-08-26 12:39:48,260 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 76 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-26 12:39:48,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 91 transitions, 372 flow [2023-08-26 12:39:48,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:39:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:39:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-08-26 12:39:48,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41408934707903783 [2023-08-26 12:39:48,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-08-26 12:39:48,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-08-26 12:39:48,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:39:48,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-08-26 12:39:48,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:48,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:48,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:48,266 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 184 flow. Second operand 3 states and 482 transitions. [2023-08-26 12:39:48,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 91 transitions, 372 flow [2023-08-26 12:39:48,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 91 transitions, 368 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:39:48,629 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 194 flow [2023-08-26 12:39:48,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2023-08-26 12:39:48,630 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -5 predicate places. [2023-08-26 12:39:48,630 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 194 flow [2023-08-26 12:39:48,630 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 12:39:48,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:48,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:39:48,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:39:48,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:39:48,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:48,631 INFO L85 PathProgramCache]: Analyzing trace with hash -633597629, now seen corresponding path program 1 times [2023-08-26 12:39:48,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:48,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124990162] [2023-08-26 12:39:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:48,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:48,688 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 12:39:48,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:39:48,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124990162] [2023-08-26 12:39:48,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124990162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:39:48,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314560001] [2023-08-26 12:39:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:48,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:39:48,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:39:48,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:39:48,692 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 12:39:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:48,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:39:48,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:39:48,767 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 12:39:48,794 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 12:39:48,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:39:48,827 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 12:39:48,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314560001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:39:48,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:39:48,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-26 12:39:48,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359944652] [2023-08-26 12:39:48,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:39:48,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:39:48,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:39:48,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:39:48,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:39:48,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 388 [2023-08-26 12:39:48,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 194 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 12:39:48,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:39:48,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 388 [2023-08-26 12:39:48,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:39:58,352 INFO L124 PetriNetUnfolderBase]: 121348/172444 cut-off events. [2023-08-26 12:39:58,352 INFO L125 PetriNetUnfolderBase]: For 14206/14206 co-relation queries the response was YES. [2023-08-26 12:39:58,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357960 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 1351176 event pairs, 16 based on Foata normal form. 15/121498 useless extension candidates. Maximal degree in co-relation 35814. Up to 133078 conditions per place. [2023-08-26 12:39:59,358 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 184 selfloop transitions, 6 changer transitions 0/203 dead transitions. [2023-08-26 12:39:59,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 203 transitions, 830 flow [2023-08-26 12:39:59,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:39:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:39:59,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 998 transitions. [2023-08-26 12:39:59,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42869415807560135 [2023-08-26 12:39:59,368 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 998 transitions. [2023-08-26 12:39:59,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 998 transitions. [2023-08-26 12:39:59,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:39:59,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 998 transitions. [2023-08-26 12:39:59,371 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 12:39:59,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:59,375 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:39:59,375 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 194 flow. Second operand 6 states and 998 transitions. [2023-08-26 12:39:59,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 203 transitions, 830 flow [2023-08-26 12:39:59,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 203 transitions, 828 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:39:59,381 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 208 flow [2023-08-26 12:39:59,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, 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 12:39:59,382 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -2 predicate places. [2023-08-26 12:39:59,383 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 208 flow [2023-08-26 12:39:59,383 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 12:39:59,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:39:59,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:39:59,392 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 12:39:59,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:39:59,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:39:59,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:39:59,592 INFO L85 PathProgramCache]: Analyzing trace with hash -633372251, now seen corresponding path program 1 times [2023-08-26 12:39:59,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:39:59,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479701578] [2023-08-26 12:39:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:39:59,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:39:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:39:59,660 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 12:39:59,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:39:59,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479701578] [2023-08-26 12:39:59,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479701578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:39:59,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:39:59,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:39:59,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755617543] [2023-08-26 12:39:59,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:39:59,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:39:59,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:39:59,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:39:59,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:39:59,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 388 [2023-08-26 12:39:59,663 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 12:39:59,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:39:59,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 388 [2023-08-26 12:39:59,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:40:08,591 INFO L124 PetriNetUnfolderBase]: 121345/168613 cut-off events. [2023-08-26 12:40:08,592 INFO L125 PetriNetUnfolderBase]: For 22796/22796 co-relation queries the response was YES. [2023-08-26 12:40:08,834 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 3816. Compared 1177854 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 12:40:09,554 INFO L140 encePairwiseOnDemand]: 380/388 looper letters, 103 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2023-08-26 12:40:09,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 112 transitions, 488 flow [2023-08-26 12:40:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:40:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:40:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 618 transitions. [2023-08-26 12:40:09,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39819587628865977 [2023-08-26 12:40:09,556 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 618 transitions. [2023-08-26 12:40:09,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 618 transitions. [2023-08-26 12:40:09,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:40:09,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 618 transitions. [2023-08-26 12:40:09,558 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 12:40:09,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:09,561 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:09,561 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 208 flow. Second operand 4 states and 618 transitions. [2023-08-26 12:40:09,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 112 transitions, 488 flow [2023-08-26 12:40:09,573 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 12:40:09,575 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 185 flow [2023-08-26 12:40:09,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, 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 12:40:09,575 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -8 predicate places. [2023-08-26 12:40:09,575 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 185 flow [2023-08-26 12:40:09,576 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 12:40:09,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:40:09,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:40:09,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 12:40:09,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:40:09,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:40:09,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1840295891, now seen corresponding path program 1 times [2023-08-26 12:40:09,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:40:09,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361365755] [2023-08-26 12:40:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:40:09,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:40:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:40:09,630 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 12:40:09,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:40:09,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361365755] [2023-08-26 12:40:09,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361365755] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:40:09,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:40:09,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:40:09,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940979526] [2023-08-26 12:40:09,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:40:09,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:40:09,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:40:09,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:40:09,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:40:09,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 388 [2023-08-26 12:40:09,633 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 12:40:09,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:40:09,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 388 [2023-08-26 12:40:09,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:40:14,035 INFO L124 PetriNetUnfolderBase]: 53801/78602 cut-off events. [2023-08-26 12:40:14,035 INFO L125 PetriNetUnfolderBase]: For 5182/5182 co-relation queries the response was YES. [2023-08-26 12:40:14,122 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 1818. Compared 552294 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 12:40:14,295 INFO L140 encePairwiseOnDemand]: 362/388 looper letters, 108 selfloop transitions, 14 changer transitions 0/129 dead transitions. [2023-08-26 12:40:14,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 545 flow [2023-08-26 12:40:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:40:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:40:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 643 transitions. [2023-08-26 12:40:14,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41430412371134023 [2023-08-26 12:40:14,297 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 643 transitions. [2023-08-26 12:40:14,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 643 transitions. [2023-08-26 12:40:14,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:40:14,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 643 transitions. [2023-08-26 12:40:14,299 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 12:40:14,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:14,301 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:14,301 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 185 flow. Second operand 4 states and 643 transitions. [2023-08-26 12:40:14,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 545 flow [2023-08-26 12:40:14,406 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 12:40:14,407 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 334 flow [2023-08-26 12:40:14,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, 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=334, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2023-08-26 12:40:14,408 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -4 predicate places. [2023-08-26 12:40:14,408 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 334 flow [2023-08-26 12:40:14,408 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 12:40:14,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:40:14,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-26 12:40:14,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 12:40:14,409 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:40:14,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:40:14,409 INFO L85 PathProgramCache]: Analyzing trace with hash -644406759, now seen corresponding path program 1 times [2023-08-26 12:40:14,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:40:14,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636229870] [2023-08-26 12:40:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:40:14,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:40:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:40:14,452 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 12:40:14,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:40:14,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636229870] [2023-08-26 12:40:14,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636229870] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:40:14,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307395303] [2023-08-26 12:40:14,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:40:14,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:40:14,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:40:14,453 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 12:40:14,456 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 12:40:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:40:14,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 12:40:14,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:40:14,542 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 12:40:14,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:40:14,569 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 12:40:14,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307395303] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:40:14,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:40:14,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-26 12:40:14,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976554678] [2023-08-26 12:40:14,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:40:14,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 12:40:14,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:40:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 12:40:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-26 12:40:14,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 388 [2023-08-26 12:40:14,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 334 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 12:40:14,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:40:14,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 388 [2023-08-26 12:40:14,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:40:15,487 INFO L124 PetriNetUnfolderBase]: 8370/13447 cut-off events. [2023-08-26 12:40:15,488 INFO L125 PetriNetUnfolderBase]: For 7541/8226 co-relation queries the response was YES. [2023-08-26 12:40:15,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33827 conditions, 13447 events. 8370/13447 cut-off events. For 7541/8226 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 91096 event pairs, 316 based on Foata normal form. 1254/14382 useless extension candidates. Maximal degree in co-relation 33819. Up to 8355 conditions per place. [2023-08-26 12:40:15,538 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 82 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-08-26 12:40:15,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 96 transitions, 454 flow [2023-08-26 12:40:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:40:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:40:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1120 transitions. [2023-08-26 12:40:15,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48109965635738833 [2023-08-26 12:40:15,541 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1120 transitions. [2023-08-26 12:40:15,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1120 transitions. [2023-08-26 12:40:15,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:40:15,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1120 transitions. [2023-08-26 12:40:15,544 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 12:40:15,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:15,547 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:15,547 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 334 flow. Second operand 6 states and 1120 transitions. [2023-08-26 12:40:15,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 96 transitions, 454 flow [2023-08-26 12:40:15,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 96 transitions, 446 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-26 12:40:15,555 INFO L231 Difference]: Finished difference. Result has 60 places, 43 transitions, 142 flow [2023-08-26 12:40:15,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=60, PETRI_TRANSITIONS=43} [2023-08-26 12:40:15,556 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -27 predicate places. [2023-08-26 12:40:15,556 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 43 transitions, 142 flow [2023-08-26 12:40:15,556 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 12:40:15,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:40:15,557 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 12:40:15,565 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 12:40:15,765 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,SelfDestructingSolverStorable16 [2023-08-26 12:40:15,765 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:40:15,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:40:15,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1303916847, now seen corresponding path program 1 times [2023-08-26 12:40:15,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:40:15,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075472803] [2023-08-26 12:40:15,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:40:15,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:40:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:40:15,780 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:40:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:40:15,799 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:40:15,799 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:40:15,800 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (39 of 40 remaining) [2023-08-26 12:40:15,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 40 remaining) [2023-08-26 12:40:15,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 40 remaining) [2023-08-26 12:40:15,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 40 remaining) [2023-08-26 12:40:15,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 40 remaining) [2023-08-26 12:40:15,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 40 remaining) [2023-08-26 12:40:15,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 40 remaining) [2023-08-26 12:40:15,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (32 of 40 remaining) [2023-08-26 12:40:15,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 40 remaining) [2023-08-26 12:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 40 remaining) [2023-08-26 12:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 40 remaining) [2023-08-26 12:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 40 remaining) [2023-08-26 12:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 40 remaining) [2023-08-26 12:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 40 remaining) [2023-08-26 12:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 40 remaining) [2023-08-26 12:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 40 remaining) [2023-08-26 12:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 40 remaining) [2023-08-26 12:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 40 remaining) [2023-08-26 12:40:15,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 40 remaining) [2023-08-26 12:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 40 remaining) [2023-08-26 12:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 40 remaining) [2023-08-26 12:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 40 remaining) [2023-08-26 12:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 40 remaining) [2023-08-26 12:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 40 remaining) [2023-08-26 12:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 40 remaining) [2023-08-26 12:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 40 remaining) [2023-08-26 12:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 40 remaining) [2023-08-26 12:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 40 remaining) [2023-08-26 12:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 40 remaining) [2023-08-26 12:40:15,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 40 remaining) [2023-08-26 12:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 40 remaining) [2023-08-26 12:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 40 remaining) [2023-08-26 12:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 40 remaining) [2023-08-26 12:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 40 remaining) [2023-08-26 12:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 40 remaining) [2023-08-26 12:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 40 remaining) [2023-08-26 12:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 40 remaining) [2023-08-26 12:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 40 remaining) [2023-08-26 12:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 40 remaining) [2023-08-26 12:40:15,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 40 remaining) [2023-08-26 12:40:15,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 12:40:15,804 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:40:15,805 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:40:15,805 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 12:40:15,832 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 12:40:15,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 254 transitions, 552 flow [2023-08-26 12:40:15,898 INFO L124 PetriNetUnfolderBase]: 86/661 cut-off events. [2023-08-26 12:40:15,898 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 12:40:15,904 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 12:40:15,904 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 254 transitions, 552 flow [2023-08-26 12:40:15,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 254 transitions, 552 flow [2023-08-26 12:40:15,909 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:40:15,909 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 254 transitions, 552 flow [2023-08-26 12:40:15,910 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 254 transitions, 552 flow [2023-08-26 12:40:15,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 254 transitions, 552 flow [2023-08-26 12:40:15,962 INFO L124 PetriNetUnfolderBase]: 86/661 cut-off events. [2023-08-26 12:40:15,962 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 12:40:15,965 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 12:40:15,979 INFO L119 LiptonReduction]: Number of co-enabled transitions 37920 [2023-08-26 12:40:19,582 INFO L134 LiptonReduction]: Checked pairs total: 110360 [2023-08-26 12:40:19,582 INFO L136 LiptonReduction]: Total number of compositions: 209 [2023-08-26 12:40:19,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:40:19,584 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;@57d8b0f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:40:19,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-08-26 12:40:19,585 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:40:19,585 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-08-26 12:40:19,585 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:40:19,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:40:19,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:40:19,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 12:40:19,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:40:19,585 INFO L85 PathProgramCache]: Analyzing trace with hash 57332, now seen corresponding path program 1 times [2023-08-26 12:40:19,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:40:19,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697025556] [2023-08-26 12:40:19,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:40:19,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:40:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:40:19,617 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 12:40:19,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:40:19,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697025556] [2023-08-26 12:40:19,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697025556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:40:19,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:40:19,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:40:19,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914023159] [2023-08-26 12:40:19,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:40:19,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:40:19,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:40:19,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:40:19,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:40:19,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 463 [2023-08-26 12:40:19,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 131 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:19,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:40:19,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 463 [2023-08-26 12:40:19,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand