/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_51-mutexptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:40:50,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:40:50,817 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 12:40:50,824 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:40:50,825 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:40:50,856 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:40:50,856 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:40:50,857 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:40:50,857 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:40:50,861 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:40:50,861 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:40:50,861 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:40:50,862 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:40:50,863 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:40:50,863 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:40:50,863 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:40:50,863 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:40:50,864 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:40:50,864 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:40:50,864 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:40:50,864 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:40:50,864 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:40:50,865 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:40:50,865 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:40:50,865 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:40:50,866 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:40:50,866 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:40:50,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:40:50,866 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:40:50,866 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:40:50,867 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:40:50,867 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:40:50,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:40:50,868 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:40:50,868 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:40:50,868 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:40:51,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:40:51,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:40:51,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:40:51,176 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:40:51,177 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:40:51,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-08-26 12:40:52,342 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:40:52,582 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:40:52,583 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-08-26 12:40:52,599 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6c7048e/efaeb060b6874ea4a523d87afa2e27f0/FLAGee56cd6cd [2023-08-26 12:40:52,614 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6c7048e/efaeb060b6874ea4a523d87afa2e27f0 [2023-08-26 12:40:52,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:40:52,621 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:40:52,624 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:40:52,624 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:40:52,627 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:40:52,627 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:40:52" (1/1) ... [2023-08-26 12:40:52,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70ee7fc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:52, skipping insertion in model container [2023-08-26 12:40:52,628 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:40:52" (1/1) ... [2023-08-26 12:40:52,686 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:40:52,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:40:53,008 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:40:53,036 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:40:53,038 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:40:53,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:40:53,104 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:40:53,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:53 WrapperNode [2023-08-26 12:40:53,105 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:40:53,106 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:40:53,106 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:40:53,106 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:40:53,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:53" (1/1) ... [2023-08-26 12:40:53,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:53" (1/1) ... [2023-08-26 12:40:53,163 INFO L138 Inliner]: procedures = 170, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 93 [2023-08-26 12:40:53,164 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:40:53,165 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:40:53,165 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:40:53,165 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:40:53,173 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:53" (1/1) ... [2023-08-26 12:40:53,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:53" (1/1) ... [2023-08-26 12:40:53,175 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:53" (1/1) ... [2023-08-26 12:40:53,176 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:53" (1/1) ... [2023-08-26 12:40:53,185 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:53" (1/1) ... [2023-08-26 12:40:53,188 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:53" (1/1) ... [2023-08-26 12:40:53,189 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:53" (1/1) ... [2023-08-26 12:40:53,191 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:53" (1/1) ... [2023-08-26 12:40:53,193 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:40:53,194 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:40:53,194 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:40:53,194 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:40:53,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:53" (1/1) ... [2023-08-26 12:40:53,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:40:53,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:40:53,220 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 12:40:53,223 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 12:40:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:40:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:40:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:40:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:40:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:40:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 12:40:53,254 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 12:40:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:40:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:40:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:40:53,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:40:53,255 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 12:40:53,362 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:40:53,364 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:40:53,558 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:40:53,568 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:40:53,568 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-26 12:40:53,570 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:40:53 BoogieIcfgContainer [2023-08-26 12:40:53,571 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:40:53,572 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:40:53,573 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:40:53,575 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:40:53,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:40:52" (1/3) ... [2023-08-26 12:40:53,576 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dccbae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:40:53, skipping insertion in model container [2023-08-26 12:40:53,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:53" (2/3) ... [2023-08-26 12:40:53,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dccbae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:40:53, skipping insertion in model container [2023-08-26 12:40:53,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:40:53" (3/3) ... [2023-08-26 12:40:53,578 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2023-08-26 12:40:53,593 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:40:53,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-26 12:40:53,593 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:40:53,647 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 12:40:53,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 143 transitions, 294 flow [2023-08-26 12:40:53,796 INFO L124 PetriNetUnfolderBase]: 19/191 cut-off events. [2023-08-26 12:40:53,796 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:40:53,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 191 events. 19/191 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 560 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 96. Up to 4 conditions per place. [2023-08-26 12:40:53,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 143 transitions, 294 flow [2023-08-26 12:40:53,812 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 143 transitions, 294 flow [2023-08-26 12:40:53,817 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:40:53,830 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 143 transitions, 294 flow [2023-08-26 12:40:53,836 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 143 transitions, 294 flow [2023-08-26 12:40:53,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 143 transitions, 294 flow [2023-08-26 12:40:53,887 INFO L124 PetriNetUnfolderBase]: 19/191 cut-off events. [2023-08-26 12:40:53,887 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:40:53,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 191 events. 19/191 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 560 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 96. Up to 4 conditions per place. [2023-08-26 12:40:53,892 INFO L119 LiptonReduction]: Number of co-enabled transitions 4644 [2023-08-26 12:40:57,910 INFO L134 LiptonReduction]: Checked pairs total: 9406 [2023-08-26 12:40:57,910 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-26 12:40:57,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:40:57,927 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;@11cb2a9b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:40:57,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-08-26 12:40:57,929 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:40:57,929 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:40:57,929 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:40:57,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:40:57,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:40:57,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-26 12:40:57,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:40:57,934 INFO L85 PathProgramCache]: Analyzing trace with hash 17568, now seen corresponding path program 1 times [2023-08-26 12:40:57,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:40:57,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418201909] [2023-08-26 12:40:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:40:57,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:40:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:40:58,222 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 12:40:58,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:40:58,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418201909] [2023-08-26 12:40:58,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418201909] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:40:58,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:40:58,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:40:58,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797305019] [2023-08-26 12:40:58,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:40:58,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:40:58,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:40:58,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:40:58,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:40:58,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 276 [2023-08-26 12:40:58,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 49 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:58,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:40:58,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 276 [2023-08-26 12:40:58,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:40:58,417 INFO L124 PetriNetUnfolderBase]: 195/453 cut-off events. [2023-08-26 12:40:58,417 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:40:58,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 891 conditions, 453 events. 195/453 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2289 event pairs, 168 based on Foata normal form. 30/301 useless extension candidates. Maximal degree in co-relation 857. Up to 412 conditions per place. [2023-08-26 12:40:58,427 INFO L140 encePairwiseOnDemand]: 261/276 looper letters, 45 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-26 12:40:58,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 208 flow [2023-08-26 12:40:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:40:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:40:58,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-26 12:40:58,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335748792270531 [2023-08-26 12:40:58,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-26 12:40:58,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-26 12:40:58,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:40:58,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-26 12:40:58,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 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 12:40:58,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:58,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:58,462 INFO L175 Difference]: Start difference. First operand has 42 places, 49 transitions, 106 flow. Second operand 3 states and 359 transitions. [2023-08-26 12:40:58,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 208 flow [2023-08-26 12:40:58,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 53 transitions, 208 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:40:58,467 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 94 flow [2023-08-26 12:40:58,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-26 12:40:58,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-26 12:40:58,472 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 94 flow [2023-08-26 12:40:58,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:58,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:40:58,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:40:58,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:40:58,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-26 12:40:58,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:40:58,481 INFO L85 PathProgramCache]: Analyzing trace with hash 17567, now seen corresponding path program 1 times [2023-08-26 12:40:58,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:40:58,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821400645] [2023-08-26 12:40:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:40:58,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:40:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:40:58,571 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 12:40:58,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:40:58,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821400645] [2023-08-26 12:40:58,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821400645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:40:58,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:40:58,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:40:58,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228341935] [2023-08-26 12:40:58,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:40:58,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:40:58,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:40:58,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:40:58,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:40:58,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 276 [2023-08-26 12:40:58,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:58,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:40:58,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 276 [2023-08-26 12:40:58,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:40:58,669 INFO L124 PetriNetUnfolderBase]: 182/422 cut-off events. [2023-08-26 12:40:58,669 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-26 12:40:58,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 422 events. 182/422 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2115 event pairs, 168 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 860. Up to 369 conditions per place. [2023-08-26 12:40:58,672 INFO L140 encePairwiseOnDemand]: 272/276 looper letters, 40 selfloop transitions, 2 changer transitions 3/50 dead transitions. [2023-08-26 12:40:58,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 208 flow [2023-08-26 12:40:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:40:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:40:58,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-08-26 12:40:58,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42632850241545894 [2023-08-26 12:40:58,674 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-08-26 12:40:58,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-08-26 12:40:58,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:40:58,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-08-26 12:40:58,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:58,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:58,678 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:58,678 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 94 flow. Second operand 3 states and 353 transitions. [2023-08-26 12:40:58,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 208 flow [2023-08-26 12:40:58,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:40:58,680 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 90 flow [2023-08-26 12:40:58,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-26 12:40:58,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-26 12:40:58,681 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 90 flow [2023-08-26 12:40:58,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:58,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:40:58,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:40:58,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:40:58,682 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 12:40:58,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:40:58,682 INFO L85 PathProgramCache]: Analyzing trace with hash 523784919, now seen corresponding path program 1 times [2023-08-26 12:40:58,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:40:58,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886919287] [2023-08-26 12:40:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:40:58,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:40:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:40:58,776 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 12:40:58,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:40:58,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886919287] [2023-08-26 12:40:58,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886919287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:40:58,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183425763] [2023-08-26 12:40:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:40:58,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:40:58,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:40:58,782 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 12:40:58,818 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 12:40:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:40:58,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:40:58,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:40:58,970 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 12:40:59,007 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 12:40:59,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:40:59,047 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 12:40:59,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183425763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:40:59,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:40:59,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:40:59,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866468736] [2023-08-26 12:40:59,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:40:59,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:40:59,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:40:59,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:40:59,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:40:59,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 276 [2023-08-26 12:40:59,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 90 flow. Second operand has 8 states, 8 states have (on average 98.875) internal successors, (791), 8 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:59,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:40:59,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 276 [2023-08-26 12:40:59,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:40:59,140 INFO L124 PetriNetUnfolderBase]: 26/88 cut-off events. [2023-08-26 12:40:59,140 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:40:59,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 88 events. 26/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 309 event pairs, 0 based on Foata normal form. 14/92 useless extension candidates. Maximal degree in co-relation 186. Up to 54 conditions per place. [2023-08-26 12:40:59,141 INFO L140 encePairwiseOnDemand]: 272/276 looper letters, 29 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-08-26 12:40:59,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 36 transitions, 143 flow [2023-08-26 12:40:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:40:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:40:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 421 transitions. [2023-08-26 12:40:59,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813405797101449 [2023-08-26 12:40:59,144 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 421 transitions. [2023-08-26 12:40:59,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 421 transitions. [2023-08-26 12:40:59,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:40:59,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 421 transitions. [2023-08-26 12:40:59,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 12:40:59,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:59,149 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:59,149 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 90 flow. Second operand 4 states and 421 transitions. [2023-08-26 12:40:59,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 36 transitions, 143 flow [2023-08-26 12:40:59,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 140 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:40:59,151 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 54 flow [2023-08-26 12:40:59,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, 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=54, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2023-08-26 12:40:59,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -13 predicate places. [2023-08-26 12:40:59,153 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 54 flow [2023-08-26 12:40:59,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 98.875) internal successors, (791), 8 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:59,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:40:59,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:40:59,168 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 12:40:59,361 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 12:40:59,361 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 12:40:59,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:40:59,362 INFO L85 PathProgramCache]: Analyzing trace with hash -942527054, now seen corresponding path program 1 times [2023-08-26 12:40:59,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:40:59,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692236820] [2023-08-26 12:40:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:40:59,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:40:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:40:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:40:59,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:40:59,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692236820] [2023-08-26 12:40:59,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692236820] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:40:59,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:40:59,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:40:59,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201088068] [2023-08-26 12:40:59,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:40:59,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:40:59,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:40:59,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:40:59,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:40:59,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 276 [2023-08-26 12:40:59,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 96.25) internal successors, (385), 4 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:59,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:40:59,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 276 [2023-08-26 12:40:59,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:40:59,546 INFO L124 PetriNetUnfolderBase]: 24/74 cut-off events. [2023-08-26 12:40:59,546 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 12:40:59,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 74 events. 24/74 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 180 event pairs, 24 based on Foata normal form. 5/65 useless extension candidates. Maximal degree in co-relation 156. Up to 65 conditions per place. [2023-08-26 12:40:59,547 INFO L140 encePairwiseOnDemand]: 273/276 looper letters, 15 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-26 12:40:59,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 20 transitions, 82 flow [2023-08-26 12:40:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:40:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:40:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-08-26 12:40:59,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36594202898550726 [2023-08-26 12:40:59,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-08-26 12:40:59,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-08-26 12:40:59,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:40:59,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-08-26 12:40:59,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:59,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:59,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:59,552 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 54 flow. Second operand 3 states and 303 transitions. [2023-08-26 12:40:59,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 20 transitions, 82 flow [2023-08-26 12:40:59,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 20 transitions, 79 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:40:59,553 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 49 flow [2023-08-26 12:40:59,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=25, 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=49, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-26 12:40:59,553 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -15 predicate places. [2023-08-26 12:40:59,553 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 49 flow [2023-08-26 12:40:59,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.25) internal successors, (385), 4 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:59,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:40:59,554 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 12:40:59,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:40:59,554 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 12:40:59,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:40:59,555 INFO L85 PathProgramCache]: Analyzing trace with hash -942536279, now seen corresponding path program 1 times [2023-08-26 12:40:59,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:40:59,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509428193] [2023-08-26 12:40:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:40:59,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:40:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:40:59,566 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:40:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:40:59,587 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:40:59,587 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:40:59,588 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (23 of 24 remaining) [2023-08-26 12:40:59,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 24 remaining) [2023-08-26 12:40:59,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 24 remaining) [2023-08-26 12:40:59,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 24 remaining) [2023-08-26 12:40:59,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 24 remaining) [2023-08-26 12:40:59,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 24 remaining) [2023-08-26 12:40:59,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 24 remaining) [2023-08-26 12:40:59,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (16 of 24 remaining) [2023-08-26 12:40:59,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 24 remaining) [2023-08-26 12:40:59,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 24 remaining) [2023-08-26 12:40:59,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 24 remaining) [2023-08-26 12:40:59,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 24 remaining) [2023-08-26 12:40:59,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 24 remaining) [2023-08-26 12:40:59,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 24 remaining) [2023-08-26 12:40:59,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 24 remaining) [2023-08-26 12:40:59,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 24 remaining) [2023-08-26 12:40:59,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 24 remaining) [2023-08-26 12:40:59,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 24 remaining) [2023-08-26 12:40:59,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 24 remaining) [2023-08-26 12:40:59,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 24 remaining) [2023-08-26 12:40:59,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 24 remaining) [2023-08-26 12:40:59,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 24 remaining) [2023-08-26 12:40:59,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 24 remaining) [2023-08-26 12:40:59,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 24 remaining) [2023-08-26 12:40:59,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:40:59,593 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 12:40:59,595 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:40:59,595 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 12:40:59,617 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 12:40:59,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 188 transitions, 394 flow [2023-08-26 12:40:59,647 INFO L124 PetriNetUnfolderBase]: 34/311 cut-off events. [2023-08-26 12:40:59,648 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:40:59,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 311 events. 34/311 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1095 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 193. Up to 8 conditions per place. [2023-08-26 12:40:59,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 188 transitions, 394 flow [2023-08-26 12:40:59,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 188 transitions, 394 flow [2023-08-26 12:40:59,653 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:40:59,653 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 188 transitions, 394 flow [2023-08-26 12:40:59,653 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 188 transitions, 394 flow [2023-08-26 12:40:59,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 188 transitions, 394 flow [2023-08-26 12:40:59,681 INFO L124 PetriNetUnfolderBase]: 34/311 cut-off events. [2023-08-26 12:40:59,681 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:40:59,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 311 events. 34/311 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1095 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 193. Up to 8 conditions per place. [2023-08-26 12:40:59,691 INFO L119 LiptonReduction]: Number of co-enabled transitions 13932 [2023-08-26 12:41:03,604 INFO L134 LiptonReduction]: Checked pairs total: 32071 [2023-08-26 12:41:03,605 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-26 12:41:03,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:41:03,607 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;@11cb2a9b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:41:03,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-08-26 12:41:03,609 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:41:03,609 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:41:03,609 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:41:03,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:03,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:41:03,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:41:03,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:03,610 INFO L85 PathProgramCache]: Analyzing trace with hash 30198, now seen corresponding path program 1 times [2023-08-26 12:41:03,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:03,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878143827] [2023-08-26 12:41:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:03,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:03,631 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 12:41:03,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:03,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878143827] [2023-08-26 12:41:03,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878143827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:03,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:03,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:41:03,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245880498] [2023-08-26 12:41:03,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:03,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:41:03,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:03,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:41:03,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:41:03,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 350 [2023-08-26 12:41:03,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:03,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:03,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 350 [2023-08-26 12:41:03,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:04,668 INFO L124 PetriNetUnfolderBase]: 7217/11590 cut-off events. [2023-08-26 12:41:04,669 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2023-08-26 12:41:04,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23064 conditions, 11590 events. 7217/11590 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 76945 event pairs, 6656 based on Foata normal form. 772/7582 useless extension candidates. Maximal degree in co-relation 17950. Up to 10526 conditions per place. [2023-08-26 12:41:04,735 INFO L140 encePairwiseOnDemand]: 327/350 looper letters, 79 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-26 12:41:04,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 88 transitions, 356 flow [2023-08-26 12:41:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:41:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:41:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-26 12:41:04,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2023-08-26 12:41:04,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-26 12:41:04,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-26 12:41:04,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:04,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-26 12:41:04,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:04,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:04,742 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:04,742 INFO L175 Difference]: Start difference. First operand has 66 places, 78 transitions, 174 flow. Second operand 3 states and 511 transitions. [2023-08-26 12:41:04,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 88 transitions, 356 flow [2023-08-26 12:41:04,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 88 transitions, 356 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:41:04,744 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 136 flow [2023-08-26 12:41:04,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=60, 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=136, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-08-26 12:41:04,745 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -4 predicate places. [2023-08-26 12:41:04,745 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 136 flow [2023-08-26 12:41:04,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:04,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:04,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:41:04,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:41:04,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:41:04,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:04,747 INFO L85 PathProgramCache]: Analyzing trace with hash 30199, now seen corresponding path program 1 times [2023-08-26 12:41:04,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:04,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875636411] [2023-08-26 12:41:04,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:04,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:04,783 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 12:41:04,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:04,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875636411] [2023-08-26 12:41:04,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875636411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:04,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:04,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:41:04,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608937439] [2023-08-26 12:41:04,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:04,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:41:04,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:04,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:41:04,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:41:04,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 350 [2023-08-26 12:41:04,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:04,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:04,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 350 [2023-08-26 12:41:04,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:05,594 INFO L124 PetriNetUnfolderBase]: 5556/9612 cut-off events. [2023-08-26 12:41:05,597 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2023-08-26 12:41:05,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18764 conditions, 9612 events. 5556/9612 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 68024 event pairs, 2600 based on Foata normal form. 0/6698 useless extension candidates. Maximal degree in co-relation 17170. Up to 8782 conditions per place. [2023-08-26 12:41:05,650 INFO L140 encePairwiseOnDemand]: 346/350 looper letters, 60 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-26 12:41:05,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 292 flow [2023-08-26 12:41:05,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:41:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:41:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-08-26 12:41:05,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42095238095238097 [2023-08-26 12:41:05,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-08-26 12:41:05,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-08-26 12:41:05,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:05,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-08-26 12:41:05,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:05,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:05,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:05,656 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 136 flow. Second operand 3 states and 442 transitions. [2023-08-26 12:41:05,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 292 flow [2023-08-26 12:41:05,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 73 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:41:05,666 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 146 flow [2023-08-26 12:41:05,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-26 12:41:05,667 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2023-08-26 12:41:05,667 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 146 flow [2023-08-26 12:41:05,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:05,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:05,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:41:05,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:41:05,668 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:41:05,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:05,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2140639819, now seen corresponding path program 1 times [2023-08-26 12:41:05,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:05,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020071322] [2023-08-26 12:41:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:05,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:05,777 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 12:41:05,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:05,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020071322] [2023-08-26 12:41:05,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020071322] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:41:05,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406760306] [2023-08-26 12:41:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:05,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:41:05,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:41:05,779 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 12:41:05,780 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 12:41:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:05,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:41:05,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:41:05,868 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 12:41:05,906 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 12:41:05,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:41:05,948 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 12:41:05,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406760306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:41:05,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:41:05,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:41:05,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456054307] [2023-08-26 12:41:05,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:41:05,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:41:05,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:05,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:41:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:41:05,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 350 [2023-08-26 12:41:05,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 146 flow. Second operand has 8 states, 8 states have (on average 127.875) internal successors, (1023), 8 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:05,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:05,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 350 [2023-08-26 12:41:05,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:06,216 INFO L124 PetriNetUnfolderBase]: 1006/1972 cut-off events. [2023-08-26 12:41:06,217 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-08-26 12:41:06,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4369 conditions, 1972 events. 1006/1972 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12405 event pairs, 0 based on Foata normal form. 225/1882 useless extension candidates. Maximal degree in co-relation 379. Up to 1202 conditions per place. [2023-08-26 12:41:06,226 INFO L140 encePairwiseOnDemand]: 346/350 looper letters, 73 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2023-08-26 12:41:06,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 85 transitions, 342 flow [2023-08-26 12:41:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:41:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:41:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 710 transitions. [2023-08-26 12:41:06,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057142857142857 [2023-08-26 12:41:06,229 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 710 transitions. [2023-08-26 12:41:06,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 710 transitions. [2023-08-26 12:41:06,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:06,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 710 transitions. [2023-08-26 12:41:06,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 350.0) internal successors, (2100), 6 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,233 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 350.0) internal successors, (2100), 6 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,233 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 146 flow. Second operand 5 states and 710 transitions. [2023-08-26 12:41:06,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 85 transitions, 342 flow [2023-08-26 12:41:06,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 85 transitions, 338 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 12:41:06,236 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 106 flow [2023-08-26 12:41:06,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-26 12:41:06,237 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -14 predicate places. [2023-08-26 12:41:06,237 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 106 flow [2023-08-26 12:41:06,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 127.875) internal successors, (1023), 8 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:06,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:41:06,248 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 12:41:06,444 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,SelfDestructingSolverStorable7 [2023-08-26 12:41:06,444 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:41:06,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:06,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2140995403, now seen corresponding path program 1 times [2023-08-26 12:41:06,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:06,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257892715] [2023-08-26 12:41:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:06,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:06,526 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 12:41:06,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:06,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257892715] [2023-08-26 12:41:06,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257892715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:06,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:06,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:41:06,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688934271] [2023-08-26 12:41:06,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:06,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:41:06,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:41:06,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:41:06,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 350 [2023-08-26 12:41:06,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:06,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 350 [2023-08-26 12:41:06,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:06,671 INFO L124 PetriNetUnfolderBase]: 1006/1723 cut-off events. [2023-08-26 12:41:06,671 INFO L125 PetriNetUnfolderBase]: For 718/718 co-relation queries the response was YES. [2023-08-26 12:41:06,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3914 conditions, 1723 events. 1006/1723 cut-off events. For 718/718 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8976 event pairs, 1006 based on Foata normal form. 39/1393 useless extension candidates. Maximal degree in co-relation 3135. Up to 1683 conditions per place. [2023-08-26 12:41:06,683 INFO L140 encePairwiseOnDemand]: 345/350 looper letters, 32 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-26 12:41:06,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 38 transitions, 164 flow [2023-08-26 12:41:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:41:06,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:41:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-08-26 12:41:06,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3742857142857143 [2023-08-26 12:41:06,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-08-26 12:41:06,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-08-26 12:41:06,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:06,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-08-26 12:41:06,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,688 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 106 flow. Second operand 3 states and 393 transitions. [2023-08-26 12:41:06,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 38 transitions, 164 flow [2023-08-26 12:41:06,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 38 transitions, 157 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 12:41:06,690 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 93 flow [2023-08-26 12:41:06,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2023-08-26 12:41:06,691 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -19 predicate places. [2023-08-26 12:41:06,691 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 93 flow [2023-08-26 12:41:06,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:06,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:41:06,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:41:06,691 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 12:41:06,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:06,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1946347496, now seen corresponding path program 1 times [2023-08-26 12:41:06,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:06,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156587469] [2023-08-26 12:41:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:06,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:06,742 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 12:41:06,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:06,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156587469] [2023-08-26 12:41:06,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156587469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:06,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:06,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:41:06,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627028630] [2023-08-26 12:41:06,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:06,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:41:06,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:06,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:41:06,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:41:06,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 350 [2023-08-26 12:41:06,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:06,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 350 [2023-08-26 12:41:06,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:06,891 INFO L124 PetriNetUnfolderBase]: 518/917 cut-off events. [2023-08-26 12:41:06,892 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2023-08-26 12:41:06,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1966 conditions, 917 events. 518/917 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4104 event pairs, 518 based on Foata normal form. 0/911 useless extension candidates. Maximal degree in co-relation 1957. Up to 883 conditions per place. [2023-08-26 12:41:06,896 INFO L140 encePairwiseOnDemand]: 341/350 looper letters, 24 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-26 12:41:06,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 127 flow [2023-08-26 12:41:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:41:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:41:06,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2023-08-26 12:41:06,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3676190476190476 [2023-08-26 12:41:06,898 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2023-08-26 12:41:06,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2023-08-26 12:41:06,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:06,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2023-08-26 12:41:06,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,901 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,901 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 93 flow. Second operand 3 states and 386 transitions. [2023-08-26 12:41:06,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 127 flow [2023-08-26 12:41:06,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:41:06,902 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 78 flow [2023-08-26 12:41:06,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, 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 12:41:06,903 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -26 predicate places. [2023-08-26 12:41:06,903 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 78 flow [2023-08-26 12:41:06,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:06,903 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 12:41:06,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:41:06,903 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 12:41:06,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:06,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1899645297, now seen corresponding path program 1 times [2023-08-26 12:41:06,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:06,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308405722] [2023-08-26 12:41:06,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:06,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:41:06,914 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:41:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:41:06,925 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:41:06,925 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:41:06,925 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (31 of 32 remaining) [2023-08-26 12:41:06,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 32 remaining) [2023-08-26 12:41:06,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 32 remaining) [2023-08-26 12:41:06,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 32 remaining) [2023-08-26 12:41:06,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 32 remaining) [2023-08-26 12:41:06,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 32 remaining) [2023-08-26 12:41:06,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 32 remaining) [2023-08-26 12:41:06,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (24 of 32 remaining) [2023-08-26 12:41:06,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 32 remaining) [2023-08-26 12:41:06,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 32 remaining) [2023-08-26 12:41:06,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 32 remaining) [2023-08-26 12:41:06,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 32 remaining) [2023-08-26 12:41:06,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 32 remaining) [2023-08-26 12:41:06,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 32 remaining) [2023-08-26 12:41:06,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 32 remaining) [2023-08-26 12:41:06,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 32 remaining) [2023-08-26 12:41:06,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 32 remaining) [2023-08-26 12:41:06,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 32 remaining) [2023-08-26 12:41:06,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 32 remaining) [2023-08-26 12:41:06,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 32 remaining) [2023-08-26 12:41:06,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 32 remaining) [2023-08-26 12:41:06,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 32 remaining) [2023-08-26 12:41:06,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 32 remaining) [2023-08-26 12:41:06,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 32 remaining) [2023-08-26 12:41:06,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 32 remaining) [2023-08-26 12:41:06,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 32 remaining) [2023-08-26 12:41:06,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 32 remaining) [2023-08-26 12:41:06,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 32 remaining) [2023-08-26 12:41:06,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 32 remaining) [2023-08-26 12:41:06,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 32 remaining) [2023-08-26 12:41:06,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 32 remaining) [2023-08-26 12:41:06,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 32 remaining) [2023-08-26 12:41:06,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 12:41:06,928 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-26 12:41:06,929 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:41:06,929 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 12:41:06,951 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 12:41:06,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 233 transitions, 496 flow [2023-08-26 12:41:06,998 INFO L124 PetriNetUnfolderBase]: 54/468 cut-off events. [2023-08-26 12:41:06,998 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:41:07,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 468 events. 54/468 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1856 event pairs, 1 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 319. Up to 16 conditions per place. [2023-08-26 12:41:07,003 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 233 transitions, 496 flow [2023-08-26 12:41:07,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 233 transitions, 496 flow [2023-08-26 12:41:07,007 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:41:07,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 233 transitions, 496 flow [2023-08-26 12:41:07,007 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 233 transitions, 496 flow [2023-08-26 12:41:07,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 233 transitions, 496 flow [2023-08-26 12:41:07,049 INFO L124 PetriNetUnfolderBase]: 54/468 cut-off events. [2023-08-26 12:41:07,049 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:41:07,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 468 events. 54/468 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1856 event pairs, 1 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 319. Up to 16 conditions per place. [2023-08-26 12:41:07,071 INFO L119 LiptonReduction]: Number of co-enabled transitions 26832 [2023-08-26 12:41:11,449 INFO L134 LiptonReduction]: Checked pairs total: 74401 [2023-08-26 12:41:11,449 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-26 12:41:11,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:41:11,450 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;@11cb2a9b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:41:11,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2023-08-26 12:41:11,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:41:11,452 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 12:41:11,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:41:11,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:11,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:41:11,452 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:41:11,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:11,453 INFO L85 PathProgramCache]: Analyzing trace with hash 45197, now seen corresponding path program 1 times [2023-08-26 12:41:11,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:11,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833264167] [2023-08-26 12:41:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:11,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:11,489 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 12:41:11,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:11,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833264167] [2023-08-26 12:41:11,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833264167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:11,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:11,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:41:11,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12513380] [2023-08-26 12:41:11,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:11,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:41:11,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:11,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:41:11,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:41:11,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 424 [2023-08-26 12:41:11,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:11,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:11,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 424 [2023-08-26 12:41:11,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:23,307 INFO L124 PetriNetUnfolderBase]: 130417/195449 cut-off events. [2023-08-26 12:41:23,307 INFO L125 PetriNetUnfolderBase]: For 2576/2576 co-relation queries the response was YES. [2023-08-26 12:41:23,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377550 conditions, 195449 events. 130417/195449 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 5935. Compared 1674506 event pairs, 84745 based on Foata normal form. 13199/149890 useless extension candidates. Maximal degree in co-relation 28012. Up to 180338 conditions per place. [2023-08-26 12:41:24,703 INFO L140 encePairwiseOnDemand]: 393/424 looper letters, 77 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-26 12:41:24,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 95 transitions, 378 flow [2023-08-26 12:41:24,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:41:24,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:41:24,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2023-08-26 12:41:24,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45676100628930816 [2023-08-26 12:41:24,706 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2023-08-26 12:41:24,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2023-08-26 12:41:24,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:24,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2023-08-26 12:41:24,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:24,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:24,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:24,710 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 240 flow. Second operand 3 states and 581 transitions. [2023-08-26 12:41:24,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 95 transitions, 378 flow [2023-08-26 12:41:24,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 95 transitions, 378 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:41:24,718 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 200 flow [2023-08-26 12:41:24,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-08-26 12:41:24,719 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -3 predicate places. [2023-08-26 12:41:24,719 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 200 flow [2023-08-26 12:41:24,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:24,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:24,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:41:24,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:41:24,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:41:24,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:24,720 INFO L85 PathProgramCache]: Analyzing trace with hash 45198, now seen corresponding path program 1 times [2023-08-26 12:41:24,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:24,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870317757] [2023-08-26 12:41:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:24,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:24,758 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 12:41:24,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:24,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870317757] [2023-08-26 12:41:24,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870317757] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:24,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:24,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:41:24,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845848042] [2023-08-26 12:41:24,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:24,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:41:24,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:24,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:41:24,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:41:24,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 424 [2023-08-26 12:41:24,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 200 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 12:41:24,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:24,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 424 [2023-08-26 12:41:24,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:39,421 INFO L124 PetriNetUnfolderBase]: 179521/249129 cut-off events. [2023-08-26 12:41:39,421 INFO L125 PetriNetUnfolderBase]: For 12432/12432 co-relation queries the response was YES. [2023-08-26 12:41:39,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512224 conditions, 249129 events. 179521/249129 cut-off events. For 12432/12432 co-relation queries the response was YES. Maximal size of possible extension queue 6998. Compared 1892321 event pairs, 165465 based on Foata normal form. 0/156536 useless extension candidates. Maximal degree in co-relation 512116. Up to 228222 conditions per place. [2023-08-26 12:41:40,725 INFO L140 encePairwiseOnDemand]: 420/424 looper letters, 112 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2023-08-26 12:41:40,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 516 flow [2023-08-26 12:41:40,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:41:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:41:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-08-26 12:41:40,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46776729559748426 [2023-08-26 12:41:40,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-08-26 12:41:40,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-08-26 12:41:40,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:40,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-08-26 12:41:40,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:40,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:40,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:40,735 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 200 flow. Second operand 3 states and 595 transitions. [2023-08-26 12:41:40,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 516 flow [2023-08-26 12:41:40,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 514 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:41:40,745 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 198 flow [2023-08-26 12:41:40,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2023-08-26 12:41:40,746 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -4 predicate places. [2023-08-26 12:41:40,746 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 198 flow [2023-08-26 12:41:40,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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 12:41:40,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:40,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:41:40,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:41:40,747 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 12:41:40,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:40,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1173894773, now seen corresponding path program 1 times [2023-08-26 12:41:40,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:40,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176466927] [2023-08-26 12:41:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:40,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:40,826 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 12:41:40,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:40,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176466927] [2023-08-26 12:41:40,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176466927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:41:40,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051303118] [2023-08-26 12:41:40,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:40,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:41:40,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:41:40,828 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 12:41:40,830 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 12:41:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:40,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:41:40,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:41:40,915 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 12:41:40,941 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 12:41:40,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:41:40,981 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 12:41:40,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051303118] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:41:40,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:41:40,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-26 12:41:40,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138898420] [2023-08-26 12:41:40,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:41:40,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:41:40,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:40,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:41:40,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:41:40,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 424 [2023-08-26 12:41:40,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 156.71428571428572) internal successors, (1097), 7 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:40,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:40,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 424 [2023-08-26 12:41:40,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:49,825 INFO L124 PetriNetUnfolderBase]: 105570/153786 cut-off events. [2023-08-26 12:41:49,825 INFO L125 PetriNetUnfolderBase]: For 12464/12464 co-relation queries the response was YES. [2023-08-26 12:41:50,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318948 conditions, 153786 events. 105570/153786 cut-off events. For 12464/12464 co-relation queries the response was YES. Maximal size of possible extension queue 4428. Compared 1266672 event pairs, 14 based on Foata normal form. 15/116876 useless extension candidates. Maximal degree in co-relation 291393. Up to 115986 conditions per place. [2023-08-26 12:41:50,567 INFO L140 encePairwiseOnDemand]: 420/424 looper letters, 178 selfloop transitions, 6 changer transitions 0/200 dead transitions. [2023-08-26 12:41:50,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 200 transitions, 814 flow [2023-08-26 12:41:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:41:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:41:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1118 transitions. [2023-08-26 12:41:50,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43946540880503143 [2023-08-26 12:41:50,571 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1118 transitions. [2023-08-26 12:41:50,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1118 transitions. [2023-08-26 12:41:50,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:50,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1118 transitions. [2023-08-26 12:41:50,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.33333333333334) internal successors, (1118), 6 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:50,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:50,578 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:50,578 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 198 flow. Second operand 6 states and 1118 transitions. [2023-08-26 12:41:50,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 200 transitions, 814 flow [2023-08-26 12:41:52,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 200 transitions, 810 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:41:52,351 INFO L231 Difference]: Finished difference. Result has 86 places, 78 transitions, 210 flow [2023-08-26 12:41:52,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=86, PETRI_TRANSITIONS=78} [2023-08-26 12:41:52,352 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -2 predicate places. [2023-08-26 12:41:52,352 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 78 transitions, 210 flow [2023-08-26 12:41:52,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 156.71428571428572) internal successors, (1097), 7 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:52,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:52,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:41:52,363 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 12:41:52,558 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 12:41:52,558 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 12:41:52,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:52,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1173474495, now seen corresponding path program 1 times [2023-08-26 12:41:52,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:52,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224715893] [2023-08-26 12:41:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:52,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:52,634 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 12:41:52,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:52,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224715893] [2023-08-26 12:41:52,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224715893] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:52,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:52,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:41:52,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716085147] [2023-08-26 12:41:52,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:52,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:41:52,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:52,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:41:52,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:41:52,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 424 [2023-08-26 12:41:52,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 78 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:52,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:52,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 424 [2023-08-26 12:41:52,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:59,584 INFO L124 PetriNetUnfolderBase]: 104088/145300 cut-off events. [2023-08-26 12:41:59,585 INFO L125 PetriNetUnfolderBase]: For 21174/21174 co-relation queries the response was YES. [2023-08-26 12:41:59,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303505 conditions, 145300 events. 104088/145300 cut-off events. For 21174/21174 co-relation queries the response was YES. Maximal size of possible extension queue 3801. Compared 1034439 event pairs, 103864 based on Foata normal form. 5956/105518 useless extension candidates. Maximal degree in co-relation 96117. Up to 144084 conditions per place. [2023-08-26 12:42:00,550 INFO L140 encePairwiseOnDemand]: 416/424 looper letters, 61 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-26 12:42:00,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 71 transitions, 320 flow [2023-08-26 12:42:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:42:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:42:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 510 transitions. [2023-08-26 12:42:00,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4009433962264151 [2023-08-26 12:42:00,553 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 510 transitions. [2023-08-26 12:42:00,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 510 transitions. [2023-08-26 12:42:00,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:42:00,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 510 transitions. [2023-08-26 12:42:00,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:00,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:00,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:00,557 INFO L175 Difference]: Start difference. First operand has 86 places, 78 transitions, 210 flow. Second operand 3 states and 510 transitions. [2023-08-26 12:42:00,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 71 transitions, 320 flow [2023-08-26 12:42:00,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 71 transitions, 305 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 12:42:00,578 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 183 flow [2023-08-26 12:42:00,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2023-08-26 12:42:00,579 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -10 predicate places. [2023-08-26 12:42:00,579 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 183 flow [2023-08-26 12:42:00,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:00,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:00,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:42:00,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 12:42:00,580 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 12:42:00,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:00,581 INFO L85 PathProgramCache]: Analyzing trace with hash -2017974593, now seen corresponding path program 1 times [2023-08-26 12:42:00,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:00,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328551072] [2023-08-26 12:42:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:00,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:00,653 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 12:42:00,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:42:00,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328551072] [2023-08-26 12:42:00,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328551072] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:42:00,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:42:00,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:42:00,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055136166] [2023-08-26 12:42:00,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:42:00,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:42:00,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:42:00,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:42:00,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:42:00,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 424 [2023-08-26 12:42:00,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:00,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:42:00,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 424 [2023-08-26 12:42:00,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:42:06,512 INFO L124 PetriNetUnfolderBase]: 42338/62796 cut-off events. [2023-08-26 12:42:06,512 INFO L125 PetriNetUnfolderBase]: For 3678/3678 co-relation queries the response was YES. [2023-08-26 12:42:06,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126938 conditions, 62796 events. 42338/62796 cut-off events. For 3678/3678 co-relation queries the response was YES. Maximal size of possible extension queue 1580. Compared 448033 event pairs, 32762 based on Foata normal form. 0/55865 useless extension candidates. Maximal degree in co-relation 126928. Up to 45226 conditions per place. [2023-08-26 12:42:06,753 INFO L140 encePairwiseOnDemand]: 397/424 looper letters, 103 selfloop transitions, 14 changer transitions 0/126 dead transitions. [2023-08-26 12:42:06,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 126 transitions, 527 flow [2023-08-26 12:42:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:42:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:42:06,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 707 transitions. [2023-08-26 12:42:06,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4168632075471698 [2023-08-26 12:42:06,755 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 707 transitions. [2023-08-26 12:42:06,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 707 transitions. [2023-08-26 12:42:06,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:42:06,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 707 transitions. [2023-08-26 12:42:06,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.75) internal successors, (707), 4 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:06,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 424.0) internal successors, (2120), 5 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:06,759 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 424.0) internal successors, (2120), 5 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:06,759 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 183 flow. Second operand 4 states and 707 transitions. [2023-08-26 12:42:06,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 126 transitions, 527 flow [2023-08-26 12:42:06,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 126 transitions, 526 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:42:06,762 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 332 flow [2023-08-26 12:42:06,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2023-08-26 12:42:06,763 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -6 predicate places. [2023-08-26 12:42:06,763 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 332 flow [2023-08-26 12:42:06,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:06,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:06,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 12:42:06,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 12:42:06,763 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:42:06,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:06,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1135960713, now seen corresponding path program 1 times [2023-08-26 12:42:06,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:06,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393073291] [2023-08-26 12:42:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:06,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:06,823 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 12:42:06,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:42:06,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393073291] [2023-08-26 12:42:06,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393073291] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:42:06,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907347974] [2023-08-26 12:42:06,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:06,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:42:06,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:42:06,825 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 12:42:06,828 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 12:42:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:06,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 12:42:06,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:42:06,931 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 12:42:06,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:42:06,965 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 12:42:06,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907347974] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:42:06,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:42:06,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-26 12:42:06,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761751537] [2023-08-26 12:42:06,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:42:06,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 12:42:06,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:42:06,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 12:42:06,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-26 12:42:06,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 424 [2023-08-26 12:42:06,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 332 flow. Second operand has 9 states, 9 states have (on average 195.44444444444446) internal successors, (1759), 9 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:06,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:42:06,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 424 [2023-08-26 12:42:06,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:42:07,916 INFO L124 PetriNetUnfolderBase]: 8167/13021 cut-off events. [2023-08-26 12:42:07,917 INFO L125 PetriNetUnfolderBase]: For 7883/8000 co-relation queries the response was YES. [2023-08-26 12:42:07,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33514 conditions, 13021 events. 8167/13021 cut-off events. For 7883/8000 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 87174 event pairs, 73 based on Foata normal form. 1180/14104 useless extension candidates. Maximal degree in co-relation 33506. Up to 7959 conditions per place. [2023-08-26 12:42:07,979 INFO L140 encePairwiseOnDemand]: 421/424 looper letters, 86 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2023-08-26 12:42:07,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 98 transitions, 477 flow [2023-08-26 12:42:07,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:42:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:42:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1250 transitions. [2023-08-26 12:42:07,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4913522012578616 [2023-08-26 12:42:07,983 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1250 transitions. [2023-08-26 12:42:07,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1250 transitions. [2023-08-26 12:42:07,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:42:07,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1250 transitions. [2023-08-26 12:42:07,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 208.33333333333334) internal successors, (1250), 6 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:07,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:07,990 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:07,990 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 332 flow. Second operand 6 states and 1250 transitions. [2023-08-26 12:42:07,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 98 transitions, 477 flow [2023-08-26 12:42:07,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 98 transitions, 469 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-26 12:42:07,998 INFO L231 Difference]: Finished difference. Result has 61 places, 43 transitions, 143 flow [2023-08-26 12:42:07,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=56, 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=143, PETRI_PLACES=61, PETRI_TRANSITIONS=43} [2023-08-26 12:42:07,998 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -27 predicate places. [2023-08-26 12:42:07,999 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 43 transitions, 143 flow [2023-08-26 12:42:07,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 195.44444444444446) internal successors, (1759), 9 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:07,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:07,999 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 12:42:08,005 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 12:42:08,204 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 12:42:08,205 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 12:42:08,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:08,205 INFO L85 PathProgramCache]: Analyzing trace with hash 347800800, now seen corresponding path program 1 times [2023-08-26 12:42:08,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:08,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083431154] [2023-08-26 12:42:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:08,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:42:08,224 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:42:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:42:08,254 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:42:08,254 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:42:08,254 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (39 of 40 remaining) [2023-08-26 12:42:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 40 remaining) [2023-08-26 12:42:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 40 remaining) [2023-08-26 12:42:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 40 remaining) [2023-08-26 12:42:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 40 remaining) [2023-08-26 12:42:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 40 remaining) [2023-08-26 12:42:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 40 remaining) [2023-08-26 12:42:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (32 of 40 remaining) [2023-08-26 12:42:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 40 remaining) [2023-08-26 12:42:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 40 remaining) [2023-08-26 12:42:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 40 remaining) [2023-08-26 12:42:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 40 remaining) [2023-08-26 12:42:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 40 remaining) [2023-08-26 12:42:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 40 remaining) [2023-08-26 12:42:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 40 remaining) [2023-08-26 12:42:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 40 remaining) [2023-08-26 12:42:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 40 remaining) [2023-08-26 12:42:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 40 remaining) [2023-08-26 12:42:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 40 remaining) [2023-08-26 12:42:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 40 remaining) [2023-08-26 12:42:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 40 remaining) [2023-08-26 12:42:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 40 remaining) [2023-08-26 12:42:08,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 40 remaining) [2023-08-26 12:42:08,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 40 remaining) [2023-08-26 12:42:08,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 40 remaining) [2023-08-26 12:42:08,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 40 remaining) [2023-08-26 12:42:08,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 40 remaining) [2023-08-26 12:42:08,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 40 remaining) [2023-08-26 12:42:08,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 40 remaining) [2023-08-26 12:42:08,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 40 remaining) [2023-08-26 12:42:08,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 40 remaining) [2023-08-26 12:42:08,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 40 remaining) [2023-08-26 12:42:08,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 40 remaining) [2023-08-26 12:42:08,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 40 remaining) [2023-08-26 12:42:08,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 40 remaining) [2023-08-26 12:42:08,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 40 remaining) [2023-08-26 12:42:08,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 40 remaining) [2023-08-26 12:42:08,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 40 remaining) [2023-08-26 12:42:08,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 40 remaining) [2023-08-26 12:42:08,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 40 remaining) [2023-08-26 12:42:08,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 12:42:08,260 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:42:08,261 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:42:08,261 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 12:42:08,297 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 12:42:08,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 278 transitions, 600 flow [2023-08-26 12:42:08,375 INFO L124 PetriNetUnfolderBase]: 86/701 cut-off events. [2023-08-26 12:42:08,375 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 12:42:08,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 701 events. 86/701 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3105 event pairs, 6 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-26 12:42:08,385 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 278 transitions, 600 flow [2023-08-26 12:42:08,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 253 places, 278 transitions, 600 flow [2023-08-26 12:42:08,392 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:42:08,392 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 253 places, 278 transitions, 600 flow [2023-08-26 12:42:08,392 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 253 places, 278 transitions, 600 flow [2023-08-26 12:42:08,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 278 transitions, 600 flow [2023-08-26 12:42:08,465 INFO L124 PetriNetUnfolderBase]: 86/701 cut-off events. [2023-08-26 12:42:08,466 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 12:42:08,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 701 events. 86/701 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3105 event pairs, 6 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-26 12:42:08,494 INFO L119 LiptonReduction]: Number of co-enabled transitions 43688 [2023-08-26 12:42:12,846 INFO L134 LiptonReduction]: Checked pairs total: 116804 [2023-08-26 12:42:12,846 INFO L136 LiptonReduction]: Total number of compositions: 234 [2023-08-26 12:42:12,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:42:12,848 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;@11cb2a9b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:42:12,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-08-26 12:42:12,849 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:42:12,849 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:42:12,849 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:42:12,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:12,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:42:12,849 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 12:42:12,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:12,849 INFO L85 PathProgramCache]: Analyzing trace with hash 63001, now seen corresponding path program 1 times [2023-08-26 12:42:12,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:12,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155950865] [2023-08-26 12:42:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:12,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:42:12,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:42:12,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155950865] [2023-08-26 12:42:12,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155950865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:42:12,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:42:12,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:42:12,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342804847] [2023-08-26 12:42:12,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:42:12,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:42:12,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:42:12,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:42:12,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:42:12,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 512 [2023-08-26 12:42:12,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 132 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:12,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:42:12,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 512 [2023-08-26 12:42:12,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand