/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/pthread-complex/safestack_relacy.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:20:19,077 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:20:19,138 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 12:20:19,142 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:20:19,143 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:20:19,165 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:20:19,166 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:20:19,166 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:20:19,167 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:20:19,169 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:20:19,169 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:20:19,170 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:20:19,170 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:20:19,171 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:20:19,171 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:20:19,171 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:20:19,171 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:20:19,171 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:20:19,171 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:20:19,171 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:20:19,172 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:20:19,172 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:20:19,172 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:20:19,173 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:20:19,173 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:20:19,173 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:20:19,173 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:20:19,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:20:19,173 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:20:19,174 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:20:19,174 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:20:19,174 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:20:19,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:20:19,175 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:20:19,175 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:20:19,175 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:20:19,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:20:19,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:20:19,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:20:19,417 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:20:19,417 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:20:19,418 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-26 12:20:20,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:20:20,594 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:20:20,594 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-26 12:20:20,613 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d676087d/55aae6e46de74ffb89c0bee1598610a7/FLAG2deb34fdc [2023-08-26 12:20:20,627 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d676087d/55aae6e46de74ffb89c0bee1598610a7 [2023-08-26 12:20:20,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:20:20,631 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:20:20,632 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:20:20,633 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:20:20,635 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:20:20,635 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:20:20" (1/1) ... [2023-08-26 12:20:20,636 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c249557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:20:20, skipping insertion in model container [2023-08-26 12:20:20,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:20:20" (1/1) ... [2023-08-26 12:20:20,688 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:20:21,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:20:21,172 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:20:21,188 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [127] [2023-08-26 12:20:21,199 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [573] [2023-08-26 12:20:21,199 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [574] [2023-08-26 12:20:21,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:20:21,317 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:20:21,317 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:20:21,322 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:20:21,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:20:21 WrapperNode [2023-08-26 12:20:21,323 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:20:21,324 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:20:21,324 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:20:21,324 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:20:21,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:20:21" (1/1) ... [2023-08-26 12:20:21,356 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:20:21" (1/1) ... [2023-08-26 12:20:21,398 INFO L138 Inliner]: procedures = 481, calls = 75, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 289 [2023-08-26 12:20:21,398 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:20:21,398 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:20:21,399 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:20:21,399 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:20:21,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:20:21" (1/1) ... [2023-08-26 12:20:21,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:20:21" (1/1) ... [2023-08-26 12:20:21,421 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:20:21" (1/1) ... [2023-08-26 12:20:21,421 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:20:21" (1/1) ... [2023-08-26 12:20:21,430 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:20:21" (1/1) ... [2023-08-26 12:20:21,432 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:20:21" (1/1) ... [2023-08-26 12:20:21,435 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:20:21" (1/1) ... [2023-08-26 12:20:21,436 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:20:21" (1/1) ... [2023-08-26 12:20:21,440 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:20:21,451 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:20:21,452 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:20:21,452 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:20:21,452 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:20:21" (1/1) ... [2023-08-26 12:20:21,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:20:21,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:20:21,481 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 12:20:21,489 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 12:20:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 12:20:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:20:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 12:20:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:20:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:20:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-08-26 12:20:21,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-08-26 12:20:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:20:21,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:20:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:20:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:20:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:20:21,509 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 12:20:21,721 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:20:21,722 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:20:22,125 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:20:22,207 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:20:22,207 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-26 12:20:22,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:20:22 BoogieIcfgContainer [2023-08-26 12:20:22,209 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:20:22,210 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:20:22,210 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:20:22,212 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:20:22,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:20:20" (1/3) ... [2023-08-26 12:20:22,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7ddff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:20:22, skipping insertion in model container [2023-08-26 12:20:22,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:20:21" (2/3) ... [2023-08-26 12:20:22,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7ddff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:20:22, skipping insertion in model container [2023-08-26 12:20:22,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:20:22" (3/3) ... [2023-08-26 12:20:22,214 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-08-26 12:20:22,225 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:20:22,225 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2023-08-26 12:20:22,225 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:20:22,340 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 12:20:22,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 306 places, 321 transitions, 650 flow [2023-08-26 12:20:22,459 INFO L124 PetriNetUnfolderBase]: 20/339 cut-off events. [2023-08-26 12:20:22,459 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:20:22,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 339 events. 20/339 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 821 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 247. Up to 4 conditions per place. [2023-08-26 12:20:22,465 INFO L82 GeneralOperation]: Start removeDead. Operand has 306 places, 321 transitions, 650 flow [2023-08-26 12:20:22,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 306 places, 321 transitions, 650 flow [2023-08-26 12:20:22,472 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:20:22,477 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 306 places, 321 transitions, 650 flow [2023-08-26 12:20:22,479 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 306 places, 321 transitions, 650 flow [2023-08-26 12:20:22,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 306 places, 321 transitions, 650 flow [2023-08-26 12:20:22,514 INFO L124 PetriNetUnfolderBase]: 20/339 cut-off events. [2023-08-26 12:20:22,514 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:20:22,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 339 events. 20/339 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 821 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 247. Up to 4 conditions per place. [2023-08-26 12:20:22,522 INFO L119 LiptonReduction]: Number of co-enabled transitions 10752 [2023-08-26 12:20:34,314 INFO L134 LiptonReduction]: Checked pairs total: 17932 [2023-08-26 12:20:34,314 INFO L136 LiptonReduction]: Total number of compositions: 425 [2023-08-26 12:20:34,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:20:34,336 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;@7455fb67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:20:34,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 123 error locations. [2023-08-26 12:20:34,337 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:20:34,337 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 12:20:34,337 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:20:34,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:34,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:20:34,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-26 12:20:34,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:34,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1549, now seen corresponding path program 1 times [2023-08-26 12:20:34,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:34,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046989626] [2023-08-26 12:20:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:34,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:34,513 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 12:20:34,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:20:34,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046989626] [2023-08-26 12:20:34,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046989626] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:20:34,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:20:34,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:20:34,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566809764] [2023-08-26 12:20:34,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:20:34,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:20:34,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:20:34,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:20:34,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:20:34,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 746 [2023-08-26 12:20:34,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 114 transitions, 236 flow. Second operand has 2 states, 2 states have (on average 274.5) internal successors, (549), 2 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:34,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:20:34,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 746 [2023-08-26 12:20:34,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:20:34,727 INFO L124 PetriNetUnfolderBase]: 485/1031 cut-off events. [2023-08-26 12:20:34,727 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:20:34,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 1031 events. 485/1031 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5543 event pairs, 423 based on Foata normal form. 20/412 useless extension candidates. Maximal degree in co-relation 1974. Up to 981 conditions per place. [2023-08-26 12:20:34,733 INFO L140 encePairwiseOnDemand]: 711/746 looper letters, 72 selfloop transitions, 0 changer transitions 0/78 dead transitions. [2023-08-26 12:20:34,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 308 flow [2023-08-26 12:20:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:20:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:20:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 655 transitions. [2023-08-26 12:20:34,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390080428954424 [2023-08-26 12:20:34,746 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 655 transitions. [2023-08-26 12:20:34,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 655 transitions. [2023-08-26 12:20:34,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:20:34,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 655 transitions. [2023-08-26 12:20:34,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 327.5) internal successors, (655), 2 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:34,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 746.0) internal successors, (2238), 3 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:34,760 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 746.0) internal successors, (2238), 3 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:34,761 INFO L175 Difference]: Start difference. First operand has 105 places, 114 transitions, 236 flow. Second operand 2 states and 655 transitions. [2023-08-26 12:20:34,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 308 flow [2023-08-26 12:20:34,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 308 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:20:34,765 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 164 flow [2023-08-26 12:20:34,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=746, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=164, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2023-08-26 12:20:34,769 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -31 predicate places. [2023-08-26 12:20:34,769 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 164 flow [2023-08-26 12:20:34,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 274.5) internal successors, (549), 2 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:34,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:34,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:20:34,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:20:34,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-26 12:20:34,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:34,775 INFO L85 PathProgramCache]: Analyzing trace with hash 49621, now seen corresponding path program 1 times [2023-08-26 12:20:34,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:34,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726364275] [2023-08-26 12:20:34,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:34,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:34,927 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 12:20:34,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:20:34,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726364275] [2023-08-26 12:20:34,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726364275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:20:34,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:20:34,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:20:34,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951751227] [2023-08-26 12:20:34,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:20:34,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:20:34,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:20:34,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:20:34,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:20:34,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 746 [2023-08-26 12:20:34,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 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 12:20:34,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:20:34,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 746 [2023-08-26 12:20:34,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:20:35,097 INFO L124 PetriNetUnfolderBase]: 485/1034 cut-off events. [2023-08-26 12:20:35,097 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:20:35,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2025 conditions, 1034 events. 485/1034 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5561 event pairs, 423 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 2021. Up to 981 conditions per place. [2023-08-26 12:20:35,101 INFO L140 encePairwiseOnDemand]: 741/746 looper letters, 73 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-26 12:20:35,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 81 transitions, 320 flow [2023-08-26 12:20:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:20:35,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:20:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 867 transitions. [2023-08-26 12:20:35,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3873994638069705 [2023-08-26 12:20:35,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 867 transitions. [2023-08-26 12:20:35,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 867 transitions. [2023-08-26 12:20:35,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:20:35,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 867 transitions. [2023-08-26 12:20:35,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:35,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 746.0) internal successors, (2984), 4 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:35,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 746.0) internal successors, (2984), 4 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:35,109 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 164 flow. Second operand 3 states and 867 transitions. [2023-08-26 12:20:35,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 81 transitions, 320 flow [2023-08-26 12:20:35,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:20:35,112 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 180 flow [2023-08-26 12:20:35,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=746, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=74, 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=180, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2023-08-26 12:20:35,113 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -28 predicate places. [2023-08-26 12:20:35,115 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 180 flow [2023-08-26 12:20:35,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 263.6666666666667) internal successors, (791), 3 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 12:20:35,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:35,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:20:35,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:20:35,117 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-26 12:20:35,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash 49532, now seen corresponding path program 1 times [2023-08-26 12:20:35,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:35,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059397206] [2023-08-26 12:20:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:35,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:35,247 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 12:20:35,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:20:35,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059397206] [2023-08-26 12:20:35,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059397206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:20:35,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:20:35,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:20:35,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994073760] [2023-08-26 12:20:35,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:20:35,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:20:35,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:20:35,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:20:35,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:20:35,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 746 [2023-08-26 12:20:35,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:35,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:20:35,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 746 [2023-08-26 12:20:35,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:20:35,411 INFO L124 PetriNetUnfolderBase]: 521/1069 cut-off events. [2023-08-26 12:20:35,411 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:20:35,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 1069 events. 521/1069 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5592 event pairs, 459 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 2138. Up to 1057 conditions per place. [2023-08-26 12:20:35,415 INFO L140 encePairwiseOnDemand]: 743/746 looper letters, 76 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-26 12:20:35,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 80 transitions, 338 flow [2023-08-26 12:20:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:20:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:20:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2023-08-26 12:20:35,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3087578194816801 [2023-08-26 12:20:35,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2023-08-26 12:20:35,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2023-08-26 12:20:35,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:20:35,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2023-08-26 12:20:35,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:35,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 746.0) internal successors, (2984), 4 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:35,423 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 746.0) internal successors, (2984), 4 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:35,423 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 180 flow. Second operand 3 states and 691 transitions. [2023-08-26 12:20:35,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 80 transitions, 338 flow [2023-08-26 12:20:35,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:20:35,425 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 186 flow [2023-08-26 12:20:35,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=746, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2023-08-26 12:20:35,426 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -26 predicate places. [2023-08-26 12:20:35,426 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 186 flow [2023-08-26 12:20:35,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:35,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:35,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:20:35,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:20:35,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-26 12:20:35,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:35,430 INFO L85 PathProgramCache]: Analyzing trace with hash 49531, now seen corresponding path program 1 times [2023-08-26 12:20:35,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:35,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343476100] [2023-08-26 12:20:35,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:35,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:35,509 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 12:20:35,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:20:35,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343476100] [2023-08-26 12:20:35,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343476100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:20:35,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:20:35,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:20:35,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187471377] [2023-08-26 12:20:35,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:20:35,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:20:35,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:20:35,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:20:35,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:20:35,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 746 [2023-08-26 12:20:35,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:35,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:20:35,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 746 [2023-08-26 12:20:35,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:20:35,665 INFO L124 PetriNetUnfolderBase]: 569/1140 cut-off events. [2023-08-26 12:20:35,665 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 12:20:35,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2290 conditions, 1140 events. 569/1140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5766 event pairs, 387 based on Foata normal form. 2/467 useless extension candidates. Maximal degree in co-relation 2283. Up to 913 conditions per place. [2023-08-26 12:20:35,669 INFO L140 encePairwiseOnDemand]: 728/746 looper letters, 83 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2023-08-26 12:20:35,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 397 flow [2023-08-26 12:20:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:20:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:20:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2023-08-26 12:20:35,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3221626452189455 [2023-08-26 12:20:35,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2023-08-26 12:20:35,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2023-08-26 12:20:35,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:20:35,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2023-08-26 12:20:35,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:35,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 746.0) internal successors, (2984), 4 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:35,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 746.0) internal successors, (2984), 4 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:35,676 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 186 flow. Second operand 3 states and 721 transitions. [2023-08-26 12:20:35,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 397 flow [2023-08-26 12:20:35,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 391 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 12:20:35,680 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 214 flow [2023-08-26 12:20:35,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=746, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-08-26 12:20:35,681 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -32 predicate places. [2023-08-26 12:20:35,681 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 214 flow [2023-08-26 12:20:35,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:35,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:35,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:20:35,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:20:35,682 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-26 12:20:35,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:35,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1539702, now seen corresponding path program 1 times [2023-08-26 12:20:35,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:35,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381875231] [2023-08-26 12:20:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:35,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:35,826 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 12:20:35,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:20:35,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381875231] [2023-08-26 12:20:35,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381875231] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:20:35,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719439740] [2023-08-26 12:20:35,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:35,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:20:35,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:20:35,828 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 12:20:35,881 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 12:20:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:35,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 12:20:35,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:20:36,034 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 12:20:36,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:20:36,062 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 12:20:36,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719439740] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:20:36,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:20:36,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:20:36,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283794176] [2023-08-26 12:20:36,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:20:36,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:20:36,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:20:36,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:20:36,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:20:36,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 746 [2023-08-26 12:20:36,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 214 flow. Second operand has 8 states, 8 states have (on average 205.125) internal successors, (1641), 8 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:36,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:20:36,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 746 [2023-08-26 12:20:36,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:20:36,476 INFO L124 PetriNetUnfolderBase]: 1133/2263 cut-off events. [2023-08-26 12:20:36,476 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-26 12:20:36,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4864 conditions, 2263 events. 1133/2263 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13850 event pairs, 594 based on Foata normal form. 13/1095 useless extension candidates. Maximal degree in co-relation 4856. Up to 1189 conditions per place. [2023-08-26 12:20:36,485 INFO L140 encePairwiseOnDemand]: 739/746 looper letters, 168 selfloop transitions, 11 changer transitions 0/181 dead transitions. [2023-08-26 12:20:36,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 181 transitions, 842 flow [2023-08-26 12:20:36,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:20:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:20:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1404 transitions. [2023-08-26 12:20:36,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3136729222520107 [2023-08-26 12:20:36,489 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1404 transitions. [2023-08-26 12:20:36,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1404 transitions. [2023-08-26 12:20:36,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:20:36,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1404 transitions. [2023-08-26 12:20:36,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:36,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 746.0) internal successors, (5222), 7 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:36,498 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 746.0) internal successors, (5222), 7 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:36,498 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 214 flow. Second operand 6 states and 1404 transitions. [2023-08-26 12:20:36,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 181 transitions, 842 flow [2023-08-26 12:20:36,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 181 transitions, 826 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:20:36,503 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 272 flow [2023-08-26 12:20:36,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=746, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2023-08-26 12:20:36,504 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -26 predicate places. [2023-08-26 12:20:36,504 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 272 flow [2023-08-26 12:20:36,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 205.125) internal successors, (1641), 8 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:36,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:36,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:20:36,513 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 12:20:36,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:20:36,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-26 12:20:36,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:36,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1539791, now seen corresponding path program 1 times [2023-08-26 12:20:36,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:36,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831552038] [2023-08-26 12:20:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:36,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:36,777 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 12:20:36,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:20:36,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831552038] [2023-08-26 12:20:36,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831552038] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:20:36,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898089900] [2023-08-26 12:20:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:36,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:20:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:20:36,781 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 12:20:36,789 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 12:20:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:36,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 12:20:36,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:20:36,905 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 12:20:36,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:20:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:20:36,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898089900] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:20:36,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:20:36,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:20:36,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538359605] [2023-08-26 12:20:36,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:20:36,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:20:36,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:20:36,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:20:36,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:20:36,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 746 [2023-08-26 12:20:36,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 272 flow. Second operand has 8 states, 8 states have (on average 264.125) internal successors, (2113), 8 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:36,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:20:36,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 746 [2023-08-26 12:20:36,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:20:37,158 INFO L124 PetriNetUnfolderBase]: 876/1834 cut-off events. [2023-08-26 12:20:37,159 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-08-26 12:20:37,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3985 conditions, 1834 events. 876/1834 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11094 event pairs, 702 based on Foata normal form. 1/895 useless extension candidates. Maximal degree in co-relation 3974. Up to 1719 conditions per place. [2023-08-26 12:20:37,169 INFO L140 encePairwiseOnDemand]: 741/746 looper letters, 71 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-26 12:20:37,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 82 transitions, 412 flow [2023-08-26 12:20:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:20:37,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:20:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1383 transitions. [2023-08-26 12:20:37,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707774798927614 [2023-08-26 12:20:37,172 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1383 transitions. [2023-08-26 12:20:37,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1383 transitions. [2023-08-26 12:20:37,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:20:37,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1383 transitions. [2023-08-26 12:20:37,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 276.6) internal successors, (1383), 5 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:37,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 746.0) internal successors, (4476), 6 states have internal predecessors, (4476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:37,179 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 746.0) internal successors, (4476), 6 states have internal predecessors, (4476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:37,179 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 272 flow. Second operand 5 states and 1383 transitions. [2023-08-26 12:20:37,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 82 transitions, 412 flow [2023-08-26 12:20:37,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 82 transitions, 402 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-26 12:20:37,182 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 266 flow [2023-08-26 12:20:37,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=746, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2023-08-26 12:20:37,183 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -22 predicate places. [2023-08-26 12:20:37,183 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 266 flow [2023-08-26 12:20:37,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 264.125) internal successors, (2113), 8 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:37,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:37,184 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-26 12:20:37,192 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 12:20:37,390 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,SelfDestructingSolverStorable5 [2023-08-26 12:20:37,390 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-26 12:20:37,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:37,390 INFO L85 PathProgramCache]: Analyzing trace with hash 47735061, now seen corresponding path program 2 times [2023-08-26 12:20:37,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:37,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302043474] [2023-08-26 12:20:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:37,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 12:20:37,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:20:37,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302043474] [2023-08-26 12:20:37,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302043474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:20:37,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:20:37,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:20:37,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557417255] [2023-08-26 12:20:37,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:20:37,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:20:37,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:20:37,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:20:37,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:20:37,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 746 [2023-08-26 12:20:37,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:37,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:20:37,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 746 [2023-08-26 12:20:37,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:20:37,708 INFO L124 PetriNetUnfolderBase]: 1068/2113 cut-off events. [2023-08-26 12:20:37,708 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-26 12:20:37,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4607 conditions, 2113 events. 1068/2113 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 12371 event pairs, 405 based on Foata normal form. 30/1028 useless extension candidates. Maximal degree in co-relation 4594. Up to 1116 conditions per place. [2023-08-26 12:20:37,715 INFO L140 encePairwiseOnDemand]: 740/746 looper letters, 101 selfloop transitions, 7 changer transitions 0/110 dead transitions. [2023-08-26 12:20:37,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 110 transitions, 547 flow [2023-08-26 12:20:37,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:20:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:20:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2023-08-26 12:20:37,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32171581769436997 [2023-08-26 12:20:37,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2023-08-26 12:20:37,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2023-08-26 12:20:37,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:20:37,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2023-08-26 12:20:37,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:37,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 746.0) internal successors, (2984), 4 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:37,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 746.0) internal successors, (2984), 4 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:37,723 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 266 flow. Second operand 3 states and 720 transitions. [2023-08-26 12:20:37,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 110 transitions, 547 flow [2023-08-26 12:20:37,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 110 transitions, 535 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-26 12:20:37,726 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 285 flow [2023-08-26 12:20:37,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=746, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2023-08-26 12:20:37,727 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -24 predicate places. [2023-08-26 12:20:37,727 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 285 flow [2023-08-26 12:20:37,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:37,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:37,727 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-08-26 12:20:37,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:20:37,728 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-26 12:20:37,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:37,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1479788347, now seen corresponding path program 1 times [2023-08-26 12:20:37,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:37,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998998412] [2023-08-26 12:20:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:37,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 12:20:37,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:20:37,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998998412] [2023-08-26 12:20:37,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998998412] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:20:37,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:20:37,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:20:37,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493551234] [2023-08-26 12:20:37,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:20:37,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:20:37,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:20:37,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:20:37,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:20:37,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 746 [2023-08-26 12:20:37,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:37,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:20:37,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 746 [2023-08-26 12:20:37,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:20:38,056 INFO L124 PetriNetUnfolderBase]: 942/1933 cut-off events. [2023-08-26 12:20:38,056 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-08-26 12:20:38,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4340 conditions, 1933 events. 942/1933 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11935 event pairs, 231 based on Foata normal form. 0/988 useless extension candidates. Maximal degree in co-relation 4327. Up to 1085 conditions per place. [2023-08-26 12:20:38,065 INFO L140 encePairwiseOnDemand]: 736/746 looper letters, 115 selfloop transitions, 17 changer transitions 2/137 dead transitions. [2023-08-26 12:20:38,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 137 transitions, 710 flow [2023-08-26 12:20:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:20:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:20:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 994 transitions. [2023-08-26 12:20:38,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3331099195710456 [2023-08-26 12:20:38,067 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 994 transitions. [2023-08-26 12:20:38,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 994 transitions. [2023-08-26 12:20:38,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:20:38,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 994 transitions. [2023-08-26 12:20:38,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 248.5) internal successors, (994), 4 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:38,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 746.0) internal successors, (3730), 5 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:38,072 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 746.0) internal successors, (3730), 5 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:38,072 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 285 flow. Second operand 4 states and 994 transitions. [2023-08-26 12:20:38,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 137 transitions, 710 flow [2023-08-26 12:20:38,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 137 transitions, 693 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 12:20:38,076 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 389 flow [2023-08-26 12:20:38,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=746, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2023-08-26 12:20:38,078 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -20 predicate places. [2023-08-26 12:20:38,078 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 389 flow [2023-08-26 12:20:38,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:38,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:38,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-08-26 12:20:38,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:20:38,079 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-26 12:20:38,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:38,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1479788346, now seen corresponding path program 1 times [2023-08-26 12:20:38,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:38,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750910340] [2023-08-26 12:20:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:38,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 12:20:38,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:20:38,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750910340] [2023-08-26 12:20:38,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750910340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:20:38,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:20:38,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:20:38,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952110886] [2023-08-26 12:20:38,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:20:38,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:20:38,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:20:38,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:20:38,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:20:38,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 746 [2023-08-26 12:20:38,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:38,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:20:38,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 746 [2023-08-26 12:20:38,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:20:38,374 INFO L124 PetriNetUnfolderBase]: 1002/2058 cut-off events. [2023-08-26 12:20:38,374 INFO L125 PetriNetUnfolderBase]: For 888/888 co-relation queries the response was YES. [2023-08-26 12:20:38,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5235 conditions, 2058 events. 1002/2058 cut-off events. For 888/888 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 11782 event pairs, 428 based on Foata normal form. 0/1346 useless extension candidates. Maximal degree in co-relation 5220. Up to 1042 conditions per place. [2023-08-26 12:20:38,383 INFO L140 encePairwiseOnDemand]: 740/746 looper letters, 136 selfloop transitions, 4 changer transitions 0/143 dead transitions. [2023-08-26 12:20:38,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 143 transitions, 798 flow [2023-08-26 12:20:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:20:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:20:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2023-08-26 12:20:38,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3574620196604111 [2023-08-26 12:20:38,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2023-08-26 12:20:38,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2023-08-26 12:20:38,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:20:38,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2023-08-26 12:20:38,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:38,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 746.0) internal successors, (2984), 4 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:38,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 746.0) internal successors, (2984), 4 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:38,390 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 389 flow. Second operand 3 states and 800 transitions. [2023-08-26 12:20:38,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 143 transitions, 798 flow [2023-08-26 12:20:38,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 143 transitions, 772 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:20:38,393 INFO L231 Difference]: Finished difference. Result has 86 places, 95 transitions, 397 flow [2023-08-26 12:20:38,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=746, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=397, PETRI_PLACES=86, PETRI_TRANSITIONS=95} [2023-08-26 12:20:38,393 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -19 predicate places. [2023-08-26 12:20:38,394 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 95 transitions, 397 flow [2023-08-26 12:20:38,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:38,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:38,394 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-26 12:20:38,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:20:38,394 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-26 12:20:38,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1371197444, now seen corresponding path program 2 times [2023-08-26 12:20:38,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:38,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153614906] [2023-08-26 12:20:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:38,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:20:38,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:20:38,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153614906] [2023-08-26 12:20:38,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153614906] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:20:38,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759165897] [2023-08-26 12:20:38,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 12:20:38,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:20:38,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:20:38,479 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 12:20:38,481 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 12:20:38,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 12:20:38,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:20:38,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 12:20:38,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:20:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 12:20:38,599 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 12:20:38,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759165897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:20:38,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 12:20:38,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2023-08-26 12:20:38,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058827750] [2023-08-26 12:20:38,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:20:38,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:20:38,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:20:38,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:20:38,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-08-26 12:20:38,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 746 [2023-08-26 12:20:38,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 95 transitions, 397 flow. Second operand has 5 states, 5 states have (on average 264.2) internal successors, (1321), 5 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:38,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:20:38,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 746 [2023-08-26 12:20:38,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:20:38,792 INFO L124 PetriNetUnfolderBase]: 772/1613 cut-off events. [2023-08-26 12:20:38,792 INFO L125 PetriNetUnfolderBase]: For 700/700 co-relation queries the response was YES. [2023-08-26 12:20:38,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4107 conditions, 1613 events. 772/1613 cut-off events. For 700/700 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9275 event pairs, 502 based on Foata normal form. 1/1092 useless extension candidates. Maximal degree in co-relation 4091. Up to 1522 conditions per place. [2023-08-26 12:20:38,799 INFO L140 encePairwiseOnDemand]: 744/746 looper letters, 73 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2023-08-26 12:20:38,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 460 flow [2023-08-26 12:20:38,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:20:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:20:38,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1379 transitions. [2023-08-26 12:20:38,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36970509383378014 [2023-08-26 12:20:38,802 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1379 transitions. [2023-08-26 12:20:38,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1379 transitions. [2023-08-26 12:20:38,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:20:38,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1379 transitions. [2023-08-26 12:20:38,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 275.8) internal successors, (1379), 5 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:38,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 746.0) internal successors, (4476), 6 states have internal predecessors, (4476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:38,809 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 746.0) internal successors, (4476), 6 states have internal predecessors, (4476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:38,809 INFO L175 Difference]: Start difference. First operand has 86 places, 95 transitions, 397 flow. Second operand 5 states and 1379 transitions. [2023-08-26 12:20:38,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 460 flow [2023-08-26 12:20:38,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 444 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 12:20:38,811 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 298 flow [2023-08-26 12:20:38,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=746, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2023-08-26 12:20:38,812 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -22 predicate places. [2023-08-26 12:20:38,812 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 298 flow [2023-08-26 12:20:38,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 264.2) internal successors, (1321), 5 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:38,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:38,812 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-26 12:20:38,820 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 12:20:39,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:20:39,018 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-26 12:20:39,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:39,018 INFO L85 PathProgramCache]: Analyzing trace with hash 831359971, now seen corresponding path program 1 times [2023-08-26 12:20:39,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:39,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484974026] [2023-08-26 12:20:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:39,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 12:20:39,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:20:39,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484974026] [2023-08-26 12:20:39,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484974026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:20:39,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069337834] [2023-08-26 12:20:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:39,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:20:39,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:20:39,143 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 12:20:39,145 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 12:20:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:39,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 12:20:39,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:20:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 12:20:39,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:20:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 12:20:39,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069337834] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:20:39,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:20:39,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-08-26 12:20:39,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722611466] [2023-08-26 12:20:39,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:20:39,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 12:20:39,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:20:39,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 12:20:39,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-26 12:20:39,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 746 [2023-08-26 12:20:39,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 298 flow. Second operand has 11 states, 11 states have (on average 219.9090909090909) internal successors, (2419), 11 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:39,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:20:39,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 746 [2023-08-26 12:20:39,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:20:39,823 INFO L124 PetriNetUnfolderBase]: 819/1790 cut-off events. [2023-08-26 12:20:39,823 INFO L125 PetriNetUnfolderBase]: For 714/715 co-relation queries the response was YES. [2023-08-26 12:20:39,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4535 conditions, 1790 events. 819/1790 cut-off events. For 714/715 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11078 event pairs, 390 based on Foata normal form. 32/1245 useless extension candidates. Maximal degree in co-relation 4522. Up to 1269 conditions per place. [2023-08-26 12:20:39,834 INFO L140 encePairwiseOnDemand]: 736/746 looper letters, 159 selfloop transitions, 13 changer transitions 0/175 dead transitions. [2023-08-26 12:20:39,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 175 transitions, 887 flow [2023-08-26 12:20:39,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:20:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:20:39,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1467 transitions. [2023-08-26 12:20:39,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3277479892761394 [2023-08-26 12:20:39,837 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1467 transitions. [2023-08-26 12:20:39,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1467 transitions. [2023-08-26 12:20:39,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:20:39,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1467 transitions. [2023-08-26 12:20:39,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 244.5) internal successors, (1467), 6 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:39,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 746.0) internal successors, (5222), 7 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:39,845 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 746.0) internal successors, (5222), 7 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:39,845 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 298 flow. Second operand 6 states and 1467 transitions. [2023-08-26 12:20:39,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 175 transitions, 887 flow [2023-08-26 12:20:39,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 175 transitions, 874 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 12:20:39,848 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 349 flow [2023-08-26 12:20:39,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=746, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=349, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-08-26 12:20:39,849 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -17 predicate places. [2023-08-26 12:20:39,849 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 349 flow [2023-08-26 12:20:39,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 219.9090909090909) internal successors, (2419), 11 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:39,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:39,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-26 12:20:39,857 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 12:20:40,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:20:40,055 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-08-26 12:20:40,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:40,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2356360, now seen corresponding path program 1 times [2023-08-26 12:20:40,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:40,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82181252] [2023-08-26 12:20:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:40,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:20:40,074 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:20:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:20:40,112 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:20:40,112 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:20:40,113 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (122 of 123 remaining) [2023-08-26 12:20:40,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (121 of 123 remaining) [2023-08-26 12:20:40,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (120 of 123 remaining) [2023-08-26 12:20:40,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (119 of 123 remaining) [2023-08-26 12:20:40,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (118 of 123 remaining) [2023-08-26 12:20:40,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (117 of 123 remaining) [2023-08-26 12:20:40,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (116 of 123 remaining) [2023-08-26 12:20:40,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 123 remaining) [2023-08-26 12:20:40,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 123 remaining) [2023-08-26 12:20:40,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 123 remaining) [2023-08-26 12:20:40,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 123 remaining) [2023-08-26 12:20:40,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 123 remaining) [2023-08-26 12:20:40,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (110 of 123 remaining) [2023-08-26 12:20:40,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 123 remaining) [2023-08-26 12:20:40,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (108 of 123 remaining) [2023-08-26 12:20:40,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 123 remaining) [2023-08-26 12:20:40,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (106 of 123 remaining) [2023-08-26 12:20:40,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (105 of 123 remaining) [2023-08-26 12:20:40,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 123 remaining) [2023-08-26 12:20:40,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr32ASSERT_VIOLATIONASSERT (103 of 123 remaining) [2023-08-26 12:20:40,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 123 remaining) [2023-08-26 12:20:40,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 123 remaining) [2023-08-26 12:20:40,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 123 remaining) [2023-08-26 12:20:40,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 123 remaining) [2023-08-26 12:20:40,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 123 remaining) [2023-08-26 12:20:40,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (97 of 123 remaining) [2023-08-26 12:20:40,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 123 remaining) [2023-08-26 12:20:40,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 123 remaining) [2023-08-26 12:20:40,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 123 remaining) [2023-08-26 12:20:40,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 123 remaining) [2023-08-26 12:20:40,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 123 remaining) [2023-08-26 12:20:40,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 123 remaining) [2023-08-26 12:20:40,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 123 remaining) [2023-08-26 12:20:40,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 123 remaining) [2023-08-26 12:20:40,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 123 remaining) [2023-08-26 12:20:40,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 123 remaining) [2023-08-26 12:20:40,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 123 remaining) [2023-08-26 12:20:40,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 123 remaining) [2023-08-26 12:20:40,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 123 remaining) [2023-08-26 12:20:40,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 123 remaining) [2023-08-26 12:20:40,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 123 remaining) [2023-08-26 12:20:40,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 123 remaining) [2023-08-26 12:20:40,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 123 remaining) [2023-08-26 12:20:40,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 123 remaining) [2023-08-26 12:20:40,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 123 remaining) [2023-08-26 12:20:40,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 123 remaining) [2023-08-26 12:20:40,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 123 remaining) [2023-08-26 12:20:40,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 123 remaining) [2023-08-26 12:20:40,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 123 remaining) [2023-08-26 12:20:40,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 123 remaining) [2023-08-26 12:20:40,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 123 remaining) [2023-08-26 12:20:40,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 123 remaining) [2023-08-26 12:20:40,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 123 remaining) [2023-08-26 12:20:40,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 123 remaining) [2023-08-26 12:20:40,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 123 remaining) [2023-08-26 12:20:40,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 123 remaining) [2023-08-26 12:20:40,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 123 remaining) [2023-08-26 12:20:40,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 123 remaining) [2023-08-26 12:20:40,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 123 remaining) [2023-08-26 12:20:40,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 123 remaining) [2023-08-26 12:20:40,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 123 remaining) [2023-08-26 12:20:40,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 123 remaining) [2023-08-26 12:20:40,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 123 remaining) [2023-08-26 12:20:40,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 123 remaining) [2023-08-26 12:20:40,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 123 remaining) [2023-08-26 12:20:40,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 123 remaining) [2023-08-26 12:20:40,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 123 remaining) [2023-08-26 12:20:40,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 123 remaining) [2023-08-26 12:20:40,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 123 remaining) [2023-08-26 12:20:40,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 123 remaining) [2023-08-26 12:20:40,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 123 remaining) [2023-08-26 12:20:40,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 123 remaining) [2023-08-26 12:20:40,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 123 remaining) [2023-08-26 12:20:40,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 123 remaining) [2023-08-26 12:20:40,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr32ASSERT_VIOLATIONASSERT (48 of 123 remaining) [2023-08-26 12:20:40,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 123 remaining) [2023-08-26 12:20:40,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 123 remaining) [2023-08-26 12:20:40,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 123 remaining) [2023-08-26 12:20:40,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 123 remaining) [2023-08-26 12:20:40,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 123 remaining) [2023-08-26 12:20:40,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 123 remaining) [2023-08-26 12:20:40,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 123 remaining) [2023-08-26 12:20:40,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 123 remaining) [2023-08-26 12:20:40,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 123 remaining) [2023-08-26 12:20:40,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 123 remaining) [2023-08-26 12:20:40,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 123 remaining) [2023-08-26 12:20:40,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 123 remaining) [2023-08-26 12:20:40,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 123 remaining) [2023-08-26 12:20:40,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 123 remaining) [2023-08-26 12:20:40,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 123 remaining) [2023-08-26 12:20:40,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 123 remaining) [2023-08-26 12:20:40,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 123 remaining) [2023-08-26 12:20:40,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 123 remaining) [2023-08-26 12:20:40,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 123 remaining) [2023-08-26 12:20:40,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 123 remaining) [2023-08-26 12:20:40,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 123 remaining) [2023-08-26 12:20:40,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 123 remaining) [2023-08-26 12:20:40,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 123 remaining) [2023-08-26 12:20:40,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 123 remaining) [2023-08-26 12:20:40,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 123 remaining) [2023-08-26 12:20:40,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 123 remaining) [2023-08-26 12:20:40,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 123 remaining) [2023-08-26 12:20:40,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 123 remaining) [2023-08-26 12:20:40,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 123 remaining) [2023-08-26 12:20:40,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 123 remaining) [2023-08-26 12:20:40,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 123 remaining) [2023-08-26 12:20:40,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 123 remaining) [2023-08-26 12:20:40,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 123 remaining) [2023-08-26 12:20:40,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 123 remaining) [2023-08-26 12:20:40,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 123 remaining) [2023-08-26 12:20:40,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 123 remaining) [2023-08-26 12:20:40,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 123 remaining) [2023-08-26 12:20:40,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 123 remaining) [2023-08-26 12:20:40,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 123 remaining) [2023-08-26 12:20:40,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 123 remaining) [2023-08-26 12:20:40,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 123 remaining) [2023-08-26 12:20:40,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 123 remaining) [2023-08-26 12:20:40,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 123 remaining) [2023-08-26 12:20:40,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 123 remaining) [2023-08-26 12:20:40,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 123 remaining) [2023-08-26 12:20:40,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 123 remaining) [2023-08-26 12:20:40,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 123 remaining) [2023-08-26 12:20:40,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 123 remaining) [2023-08-26 12:20:40,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:20:40,125 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:20:40,127 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:20:40,127 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 12:20:40,192 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 12:20:40,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 520 places, 547 transitions, 1112 flow [2023-08-26 12:20:40,268 INFO L124 PetriNetUnfolderBase]: 38/607 cut-off events. [2023-08-26 12:20:40,268 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:20:40,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 607 events. 38/607 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2432 event pairs, 0 based on Foata normal form. 0/433 useless extension candidates. Maximal degree in co-relation 486. Up to 8 conditions per place. [2023-08-26 12:20:40,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 520 places, 547 transitions, 1112 flow [2023-08-26 12:20:40,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 520 places, 547 transitions, 1112 flow [2023-08-26 12:20:40,282 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:20:40,282 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 520 places, 547 transitions, 1112 flow [2023-08-26 12:20:40,282 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 520 places, 547 transitions, 1112 flow [2023-08-26 12:20:40,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 520 places, 547 transitions, 1112 flow [2023-08-26 12:20:40,354 INFO L124 PetriNetUnfolderBase]: 38/607 cut-off events. [2023-08-26 12:20:40,355 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:20:40,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 607 events. 38/607 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2432 event pairs, 0 based on Foata normal form. 0/433 useless extension candidates. Maximal degree in co-relation 486. Up to 8 conditions per place. [2023-08-26 12:20:40,389 INFO L119 LiptonReduction]: Number of co-enabled transitions 126784 [2023-08-26 12:20:55,892 INFO L134 LiptonReduction]: Checked pairs total: 232815 [2023-08-26 12:20:55,892 INFO L136 LiptonReduction]: Total number of compositions: 704 [2023-08-26 12:20:55,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:20:55,894 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;@7455fb67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:20:55,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 178 error locations. [2023-08-26 12:20:55,895 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:20:55,895 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-26 12:20:55,895 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:20:55,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:55,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:20:55,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 175 more)] === [2023-08-26 12:20:55,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:55,895 INFO L85 PathProgramCache]: Analyzing trace with hash 3030, now seen corresponding path program 1 times [2023-08-26 12:20:55,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:55,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903620223] [2023-08-26 12:20:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:55,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:55,905 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 12:20:55,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:20:55,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903620223] [2023-08-26 12:20:55,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903620223] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:20:55,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:20:55,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:20:55,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994356673] [2023-08-26 12:20:55,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:20:55,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:20:55,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:20:55,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:20:55,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:20:55,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 456 out of 1251 [2023-08-26 12:20:55,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 207 transitions, 432 flow. Second operand has 2 states, 2 states have (on average 456.5) internal successors, (913), 2 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:55,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:20:55,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 456 of 1251 [2023-08-26 12:20:55,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:00,388 INFO L124 PetriNetUnfolderBase]: 50497/77428 cut-off events. [2023-08-26 12:21:00,388 INFO L125 PetriNetUnfolderBase]: For 408/408 co-relation queries the response was YES. [2023-08-26 12:21:00,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152541 conditions, 77428 events. 50497/77428 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 2305. Compared 592566 event pairs, 44524 based on Foata normal form. 987/31774 useless extension candidates. Maximal degree in co-relation 136829. Up to 74855 conditions per place. [2023-08-26 12:21:00,727 INFO L140 encePairwiseOnDemand]: 1192/1251 looper letters, 128 selfloop transitions, 0 changer transitions 0/145 dead transitions. [2023-08-26 12:21:00,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 145 transitions, 564 flow [2023-08-26 12:21:00,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:21:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:21:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1099 transitions. [2023-08-26 12:21:00,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43924860111910474 [2023-08-26 12:21:00,730 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1099 transitions. [2023-08-26 12:21:00,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1099 transitions. [2023-08-26 12:21:00,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:00,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1099 transitions. [2023-08-26 12:21:00,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 549.5) internal successors, (1099), 2 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:00,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1251.0) internal successors, (3753), 3 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:00,735 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1251.0) internal successors, (3753), 3 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:00,735 INFO L175 Difference]: Start difference. First operand has 190 places, 207 transitions, 432 flow. Second operand 2 states and 1099 transitions. [2023-08-26 12:21:00,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 145 transitions, 564 flow [2023-08-26 12:21:00,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 145 transitions, 564 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:21:00,737 INFO L231 Difference]: Finished difference. Result has 136 places, 145 transitions, 308 flow [2023-08-26 12:21:00,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1251, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=308, PETRI_PLACES=136, PETRI_TRANSITIONS=145} [2023-08-26 12:21:00,739 INFO L281 CegarLoopForPetriNet]: 190 programPoint places, -54 predicate places. [2023-08-26 12:21:00,739 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 145 transitions, 308 flow [2023-08-26 12:21:00,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 456.5) internal successors, (913), 2 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:00,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:00,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:21:00,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:21:00,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 175 more)] === [2023-08-26 12:21:00,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:00,740 INFO L85 PathProgramCache]: Analyzing trace with hash 96731, now seen corresponding path program 1 times [2023-08-26 12:21:00,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:00,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657357224] [2023-08-26 12:21:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:00,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:00,821 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 12:21:00,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:00,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657357224] [2023-08-26 12:21:00,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657357224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:21:00,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:21:00,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:21:00,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043865355] [2023-08-26 12:21:00,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:21:00,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:21:00,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:00,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:21:00,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:21:00,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 1251 [2023-08-26 12:21:00,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 145 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 352.6666666666667) internal successors, (1058), 3 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:00,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:00,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 1251 [2023-08-26 12:21:00,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:07,032 INFO L124 PetriNetUnfolderBase]: 73018/109261 cut-off events. [2023-08-26 12:21:07,033 INFO L125 PetriNetUnfolderBase]: For 636/636 co-relation queries the response was YES. [2023-08-26 12:21:07,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218108 conditions, 109261 events. 73018/109261 cut-off events. For 636/636 co-relation queries the response was YES. Maximal size of possible extension queue 3001. Compared 833097 event pairs, 28726 based on Foata normal form. 0/42561 useless extension candidates. Maximal degree in co-relation 218103. Up to 94461 conditions per place. [2023-08-26 12:21:07,443 INFO L140 encePairwiseOnDemand]: 1240/1251 looper letters, 201 selfloop transitions, 6 changer transitions 0/212 dead transitions. [2023-08-26 12:21:07,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 212 transitions, 870 flow [2023-08-26 12:21:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:21:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:21:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1268 transitions. [2023-08-26 12:21:07,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33786304289901414 [2023-08-26 12:21:07,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1268 transitions. [2023-08-26 12:21:07,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1268 transitions. [2023-08-26 12:21:07,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:07,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1268 transitions. [2023-08-26 12:21:07,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 422.6666666666667) internal successors, (1268), 3 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:07,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1251.0) internal successors, (5004), 4 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:07,452 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1251.0) internal successors, (5004), 4 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:07,452 INFO L175 Difference]: Start difference. First operand has 136 places, 145 transitions, 308 flow. Second operand 3 states and 1268 transitions. [2023-08-26 12:21:07,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 212 transitions, 870 flow [2023-08-26 12:21:07,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 212 transitions, 870 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:21:07,455 INFO L231 Difference]: Finished difference. Result has 139 places, 150 transitions, 356 flow [2023-08-26 12:21:07,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1251, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=139, PETRI_TRANSITIONS=150} [2023-08-26 12:21:07,455 INFO L281 CegarLoopForPetriNet]: 190 programPoint places, -51 predicate places. [2023-08-26 12:21:07,455 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 150 transitions, 356 flow [2023-08-26 12:21:07,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 352.6666666666667) internal successors, (1058), 3 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:07,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:07,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:21:07,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 12:21:07,456 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 175 more)] === [2023-08-26 12:21:07,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:07,456 INFO L85 PathProgramCache]: Analyzing trace with hash 96732, now seen corresponding path program 1 times [2023-08-26 12:21:07,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:07,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760518611] [2023-08-26 12:21:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:07,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:07,493 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 12:21:07,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:07,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760518611] [2023-08-26 12:21:07,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760518611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:21:07,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:21:07,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:21:07,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873177574] [2023-08-26 12:21:07,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:21:07,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:21:07,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:21:07,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:21:07,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 1251 [2023-08-26 12:21:07,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 150 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 352.6666666666667) internal successors, (1058), 3 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:07,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:07,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 1251 [2023-08-26 12:21:07,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:15,300 INFO L124 PetriNetUnfolderBase]: 83969/128040 cut-off events. [2023-08-26 12:21:15,300 INFO L125 PetriNetUnfolderBase]: For 4328/4328 co-relation queries the response was YES. [2023-08-26 12:21:15,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263194 conditions, 128040 events. 83969/128040 cut-off events. For 4328/4328 co-relation queries the response was YES. Maximal size of possible extension queue 3318. Compared 1018696 event pairs, 53760 based on Foata normal form. 0/56699 useless extension candidates. Maximal degree in co-relation 263187. Up to 95530 conditions per place. [2023-08-26 12:21:15,955 INFO L140 encePairwiseOnDemand]: 1210/1251 looper letters, 236 selfloop transitions, 26 changer transitions 0/267 dead transitions. [2023-08-26 12:21:15,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 267 transitions, 1141 flow [2023-08-26 12:21:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:21:15,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:21:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1328 transitions. [2023-08-26 12:21:15,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3538502531308287 [2023-08-26 12:21:15,958 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1328 transitions. [2023-08-26 12:21:15,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1328 transitions. [2023-08-26 12:21:15,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:15,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1328 transitions. [2023-08-26 12:21:15,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 442.6666666666667) internal successors, (1328), 3 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:15,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1251.0) internal successors, (5004), 4 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:15,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1251.0) internal successors, (5004), 4 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:15,964 INFO L175 Difference]: Start difference. First operand has 139 places, 150 transitions, 356 flow. Second operand 3 states and 1328 transitions. [2023-08-26 12:21:15,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 267 transitions, 1141 flow [2023-08-26 12:21:15,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 267 transitions, 1135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:21:15,974 INFO L231 Difference]: Finished difference. Result has 140 places, 173 transitions, 576 flow [2023-08-26 12:21:15,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1251, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=576, PETRI_PLACES=140, PETRI_TRANSITIONS=173} [2023-08-26 12:21:15,974 INFO L281 CegarLoopForPetriNet]: 190 programPoint places, -50 predicate places. [2023-08-26 12:21:15,974 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 173 transitions, 576 flow [2023-08-26 12:21:15,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 352.6666666666667) internal successors, (1058), 3 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:15,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:15,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:21:15,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 12:21:15,975 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 175 more)] === [2023-08-26 12:21:15,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:15,975 INFO L85 PathProgramCache]: Analyzing trace with hash 96839, now seen corresponding path program 1 times [2023-08-26 12:21:15,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:15,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507981754] [2023-08-26 12:21:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:15,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:16,006 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 12:21:16,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:16,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507981754] [2023-08-26 12:21:16,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507981754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:21:16,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:21:16,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:21:16,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121848324] [2023-08-26 12:21:16,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:21:16,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:21:16,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:16,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:21:16,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:21:16,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 445 out of 1251 [2023-08-26 12:21:16,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 173 transitions, 576 flow. Second operand has 3 states, 3 states have (on average 445.6666666666667) internal successors, (1337), 3 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:16,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:16,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 445 of 1251 [2023-08-26 12:21:16,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:22,869 INFO L124 PetriNetUnfolderBase]: 65668/104176 cut-off events. [2023-08-26 12:21:22,869 INFO L125 PetriNetUnfolderBase]: For 14734/15027 co-relation queries the response was YES. [2023-08-26 12:21:23,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236673 conditions, 104176 events. 65668/104176 cut-off events. For 14734/15027 co-relation queries the response was YES. Maximal size of possible extension queue 3063. Compared 873615 event pairs, 54858 based on Foata normal form. 1/52976 useless extension candidates. Maximal degree in co-relation 236665. Up to 98819 conditions per place. [2023-08-26 12:21:23,331 INFO L140 encePairwiseOnDemand]: 1247/1251 looper letters, 148 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2023-08-26 12:21:23,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 169 transitions, 860 flow [2023-08-26 12:21:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:21:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:21:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1464 transitions. [2023-08-26 12:21:23,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390087929656275 [2023-08-26 12:21:23,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1464 transitions. [2023-08-26 12:21:23,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1464 transitions. [2023-08-26 12:21:23,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:23,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1464 transitions. [2023-08-26 12:21:23,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 488.0) internal successors, (1464), 3 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:23,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1251.0) internal successors, (5004), 4 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:23,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1251.0) internal successors, (5004), 4 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:23,340 INFO L175 Difference]: Start difference. First operand has 140 places, 173 transitions, 576 flow. Second operand 3 states and 1464 transitions. [2023-08-26 12:21:23,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 169 transitions, 860 flow [2023-08-26 12:21:24,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 169 transitions, 806 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 12:21:24,399 INFO L231 Difference]: Finished difference. Result has 141 places, 169 transitions, 516 flow [2023-08-26 12:21:24,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1251, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=516, PETRI_PLACES=141, PETRI_TRANSITIONS=169} [2023-08-26 12:21:24,399 INFO L281 CegarLoopForPetriNet]: 190 programPoint places, -49 predicate places. [2023-08-26 12:21:24,400 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 169 transitions, 516 flow [2023-08-26 12:21:24,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 445.6666666666667) internal successors, (1337), 3 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:24,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:24,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:21:24,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 12:21:24,400 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 175 more)] === [2023-08-26 12:21:24,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash 3004546, now seen corresponding path program 1 times [2023-08-26 12:21:24,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:24,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673961491] [2023-08-26 12:21:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:24,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:24,439 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 12:21:24,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:24,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673961491] [2023-08-26 12:21:24,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673961491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:21:24,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620338783] [2023-08-26 12:21:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:24,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:24,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:21:24,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:21:24,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 12:21:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:24,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 12:21:24,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:21:24,549 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 12:21:24,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:21:24,559 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 12:21:24,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620338783] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:21:24,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:21:24,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:21:24,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145430944] [2023-08-26 12:21:24,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:21:24,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:21:24,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:21:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:21:24,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 445 out of 1251 [2023-08-26 12:21:24,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 169 transitions, 516 flow. Second operand has 8 states, 8 states have (on average 446.125) internal successors, (3569), 8 states have internal predecessors, (3569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:24,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:24,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 445 of 1251 [2023-08-26 12:21:24,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:31,180 INFO L124 PetriNetUnfolderBase]: 65668/104178 cut-off events. [2023-08-26 12:21:31,180 INFO L125 PetriNetUnfolderBase]: For 8514/8787 co-relation queries the response was YES. [2023-08-26 12:21:31,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229433 conditions, 104178 events. 65668/104178 cut-off events. For 8514/8787 co-relation queries the response was YES. Maximal size of possible extension queue 3063. Compared 873626 event pairs, 54858 based on Foata normal form. 1/50607 useless extension candidates. Maximal degree in co-relation 229424. Up to 98818 conditions per place. [2023-08-26 12:21:31,657 INFO L140 encePairwiseOnDemand]: 1246/1251 looper letters, 148 selfloop transitions, 4 changer transitions 0/171 dead transitions. [2023-08-26 12:21:31,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 171 transitions, 828 flow [2023-08-26 12:21:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:21:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:21:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2356 transitions. [2023-08-26 12:21:31,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37665867306155076 [2023-08-26 12:21:31,661 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2356 transitions. [2023-08-26 12:21:31,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2356 transitions. [2023-08-26 12:21:31,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:31,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2356 transitions. [2023-08-26 12:21:31,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 471.2) internal successors, (2356), 5 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:31,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1251.0) internal successors, (7506), 6 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:31,670 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1251.0) internal successors, (7506), 6 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:31,670 INFO L175 Difference]: Start difference. First operand has 141 places, 169 transitions, 516 flow. Second operand 5 states and 2356 transitions. [2023-08-26 12:21:31,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 171 transitions, 828 flow [2023-08-26 12:21:31,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 171 transitions, 824 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:21:31,681 INFO L231 Difference]: Finished difference. Result has 145 places, 171 transitions, 541 flow [2023-08-26 12:21:31,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1251, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=541, PETRI_PLACES=145, PETRI_TRANSITIONS=171} [2023-08-26 12:21:31,681 INFO L281 CegarLoopForPetriNet]: 190 programPoint places, -45 predicate places. [2023-08-26 12:21:31,681 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 171 transitions, 541 flow [2023-08-26 12:21:31,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 446.125) internal successors, (3569), 8 states have internal predecessors, (3569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:31,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:31,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:21:31,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-26 12:21:31,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-26 12:21:31,887 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 175 more)] === [2023-08-26 12:21:31,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:31,887 INFO L85 PathProgramCache]: Analyzing trace with hash 3004438, now seen corresponding path program 1 times [2023-08-26 12:21:31,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:31,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549188771] [2023-08-26 12:21:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:31,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:31,962 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 12:21:31,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:31,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549188771] [2023-08-26 12:21:31,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549188771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:21:31,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945698629] [2023-08-26 12:21:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:31,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:21:31,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:21:31,964 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:21:31,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 12:21:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:32,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 12:21:32,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:21:32,086 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 12:21:32,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:21:32,113 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 12:21:32,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945698629] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:21:32,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:21:32,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:21:32,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794430188] [2023-08-26 12:21:32,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:21:32,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:21:32,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:32,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:21:32,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:21:32,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 1251 [2023-08-26 12:21:32,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 171 transitions, 541 flow. Second operand has 8 states, 8 states have (on average 353.125) internal successors, (2825), 8 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:32,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:32,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 1251 [2023-08-26 12:21:32,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:41,264 INFO L124 PetriNetUnfolderBase]: 93031/141523 cut-off events. [2023-08-26 12:21:41,264 INFO L125 PetriNetUnfolderBase]: For 12698/12698 co-relation queries the response was YES. [2023-08-26 12:21:41,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320203 conditions, 141523 events. 93031/141523 cut-off events. For 12698/12698 co-relation queries the response was YES. Maximal size of possible extension queue 3319. Compared 1134648 event pairs, 33252 based on Foata normal form. 3/72746 useless extension candidates. Maximal degree in co-relation 320193. Up to 119636 conditions per place. [2023-08-26 12:21:42,119 INFO L140 encePairwiseOnDemand]: 1244/1251 looper letters, 270 selfloop transitions, 13 changer transitions 0/288 dead transitions. [2023-08-26 12:21:42,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 288 transitions, 1485 flow [2023-08-26 12:21:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:21:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:21:42,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2373 transitions. [2023-08-26 12:21:42,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3161470823341327 [2023-08-26 12:21:42,124 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2373 transitions. [2023-08-26 12:21:42,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2373 transitions. [2023-08-26 12:21:42,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:42,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2373 transitions. [2023-08-26 12:21:42,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 395.5) internal successors, (2373), 6 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:42,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1251.0) internal successors, (8757), 7 states have internal predecessors, (8757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:42,133 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1251.0) internal successors, (8757), 7 states have internal predecessors, (8757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:42,133 INFO L175 Difference]: Start difference. First operand has 145 places, 171 transitions, 541 flow. Second operand 6 states and 2373 transitions. [2023-08-26 12:21:42,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 288 transitions, 1485 flow [2023-08-26 12:21:42,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 288 transitions, 1476 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 12:21:42,143 INFO L231 Difference]: Finished difference. Result has 150 places, 180 transitions, 622 flow [2023-08-26 12:21:42,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1251, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=622, PETRI_PLACES=150, PETRI_TRANSITIONS=180} [2023-08-26 12:21:42,143 INFO L281 CegarLoopForPetriNet]: 190 programPoint places, -40 predicate places. [2023-08-26 12:21:42,143 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 180 transitions, 622 flow [2023-08-26 12:21:42,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 353.125) internal successors, (2825), 8 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:42,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:42,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-26 12:21:42,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 12:21:42,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 12:21:42,351 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 175 more)] === [2023-08-26 12:21:42,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:42,351 INFO L85 PathProgramCache]: Analyzing trace with hash 93143463, now seen corresponding path program 2 times [2023-08-26 12:21:42,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:42,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805120600] [2023-08-26 12:21:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:42,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 12:21:42,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:42,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805120600] [2023-08-26 12:21:42,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805120600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:21:42,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:21:42,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:21:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026422787] [2023-08-26 12:21:42,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:21:42,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:21:42,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:21:42,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:21:42,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 1251 [2023-08-26 12:21:42,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 180 transitions, 622 flow. Second operand has 3 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:42,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:42,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 1251 [2023-08-26 12:21:42,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:21:51,907 INFO L124 PetriNetUnfolderBase]: 96073/145806 cut-off events. [2023-08-26 12:21:51,907 INFO L125 PetriNetUnfolderBase]: For 20482/20482 co-relation queries the response was YES. [2023-08-26 12:21:52,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335905 conditions, 145806 events. 96073/145806 cut-off events. For 20482/20482 co-relation queries the response was YES. Maximal size of possible extension queue 3774. Compared 1169791 event pairs, 31576 based on Foata normal form. 2022/77092 useless extension candidates. Maximal degree in co-relation 335892. Up to 119767 conditions per place. [2023-08-26 12:21:52,651 INFO L140 encePairwiseOnDemand]: 1241/1251 looper letters, 212 selfloop transitions, 13 changer transitions 0/230 dead transitions. [2023-08-26 12:21:52,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 230 transitions, 1227 flow [2023-08-26 12:21:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:21:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:21:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1258 transitions. [2023-08-26 12:21:52,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33519850786037836 [2023-08-26 12:21:52,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1258 transitions. [2023-08-26 12:21:52,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1258 transitions. [2023-08-26 12:21:52,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:21:52,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1258 transitions. [2023-08-26 12:21:52,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 419.3333333333333) internal successors, (1258), 3 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:52,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1251.0) internal successors, (5004), 4 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:52,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1251.0) internal successors, (5004), 4 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:52,658 INFO L175 Difference]: Start difference. First operand has 150 places, 180 transitions, 622 flow. Second operand 3 states and 1258 transitions. [2023-08-26 12:21:52,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 230 transitions, 1227 flow [2023-08-26 12:21:52,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 230 transitions, 1203 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-26 12:21:52,667 INFO L231 Difference]: Finished difference. Result has 150 places, 183 transitions, 671 flow [2023-08-26 12:21:52,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1251, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=671, PETRI_PLACES=150, PETRI_TRANSITIONS=183} [2023-08-26 12:21:52,667 INFO L281 CegarLoopForPetriNet]: 190 programPoint places, -40 predicate places. [2023-08-26 12:21:52,667 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 183 transitions, 671 flow [2023-08-26 12:21:52,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:52,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:21:52,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-08-26 12:21:52,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 12:21:52,668 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 175 more)] === [2023-08-26 12:21:52,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:21:52,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1407517272, now seen corresponding path program 1 times [2023-08-26 12:21:52,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:21:52,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630208041] [2023-08-26 12:21:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:21:52,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:21:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:21:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 12:21:52,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:21:52,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630208041] [2023-08-26 12:21:52,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630208041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:21:52,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:21:52,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:21:52,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288675421] [2023-08-26 12:21:52,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:21:52,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:21:52,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:21:52,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:21:52,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:21:52,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 378 out of 1251 [2023-08-26 12:21:52,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 183 transitions, 671 flow. Second operand has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:21:52,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:21:52,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 378 of 1251 [2023-08-26 12:21:52,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:22:01,892 INFO L124 PetriNetUnfolderBase]: 90497/138447 cut-off events. [2023-08-26 12:22:01,893 INFO L125 PetriNetUnfolderBase]: For 33272/33704 co-relation queries the response was YES. [2023-08-26 12:22:02,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325567 conditions, 138447 events. 90497/138447 cut-off events. For 33272/33704 co-relation queries the response was YES. Maximal size of possible extension queue 3766. Compared 1127159 event pairs, 29375 based on Foata normal form. 0/72581 useless extension candidates. Maximal degree in co-relation 325552. Up to 116031 conditions per place. [2023-08-26 12:22:02,745 INFO L140 encePairwiseOnDemand]: 1239/1251 looper letters, 246 selfloop transitions, 29 changer transitions 0/284 dead transitions. [2023-08-26 12:22:02,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 284 transitions, 1580 flow [2023-08-26 12:22:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:22:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:22:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1746 transitions. [2023-08-26 12:22:02,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3489208633093525 [2023-08-26 12:22:02,748 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1746 transitions. [2023-08-26 12:22:02,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1746 transitions. [2023-08-26 12:22:02,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:22:02,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1746 transitions. [2023-08-26 12:22:02,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 436.5) internal successors, (1746), 4 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:22:02,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1251.0) internal successors, (6255), 5 states have internal predecessors, (6255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:22:02,753 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1251.0) internal successors, (6255), 5 states have internal predecessors, (6255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:22:02,753 INFO L175 Difference]: Start difference. First operand has 150 places, 183 transitions, 671 flow. Second operand 4 states and 1746 transitions. [2023-08-26 12:22:02,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 284 transitions, 1580 flow [2023-08-26 12:22:03,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 284 transitions, 1531 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-26 12:22:03,292 INFO L231 Difference]: Finished difference. Result has 154 places, 198 transitions, 833 flow [2023-08-26 12:22:03,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1251, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=833, PETRI_PLACES=154, PETRI_TRANSITIONS=198} [2023-08-26 12:22:03,293 INFO L281 CegarLoopForPetriNet]: 190 programPoint places, -36 predicate places. [2023-08-26 12:22:03,293 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 198 transitions, 833 flow [2023-08-26 12:22:03,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:22:03,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:22:03,293 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-08-26 12:22:03,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 12:22:03,293 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 175 more)] === [2023-08-26 12:22:03,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:22:03,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1407517271, now seen corresponding path program 1 times [2023-08-26 12:22:03,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:22:03,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324704217] [2023-08-26 12:22:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:22:03,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:22:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:22:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 12:22:03,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:22:03,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324704217] [2023-08-26 12:22:03,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324704217] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:22:03,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:22:03,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:22:03,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134173388] [2023-08-26 12:22:03,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:22:03,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:22:03,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:22:03,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:22:03,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:22:03,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 1251 [2023-08-26 12:22:03,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 198 transitions, 833 flow. Second operand has 3 states, 3 states have (on average 384.3333333333333) internal successors, (1153), 3 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:22:03,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:22:03,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 1251 [2023-08-26 12:22:03,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:22:15,263 INFO L124 PetriNetUnfolderBase]: 111044/171382 cut-off events. [2023-08-26 12:22:15,263 INFO L125 PetriNetUnfolderBase]: For 57176/57176 co-relation queries the response was YES. [2023-08-26 12:22:15,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422132 conditions, 171382 events. 111044/171382 cut-off events. For 57176/57176 co-relation queries the response was YES. Maximal size of possible extension queue 4543. Compared 1440568 event pairs, 40491 based on Foata normal form. 0/104322 useless extension candidates. Maximal degree in co-relation 422115. Up to 109926 conditions per place. [2023-08-26 12:22:16,229 INFO L140 encePairwiseOnDemand]: 1242/1251 looper letters, 295 selfloop transitions, 7 changer transitions 0/311 dead transitions. [2023-08-26 12:22:16,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 311 transitions, 1754 flow [2023-08-26 12:22:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:22:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:22:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1397 transitions. [2023-08-26 12:22:16,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722355448974154 [2023-08-26 12:22:16,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1397 transitions. [2023-08-26 12:22:16,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1397 transitions. [2023-08-26 12:22:16,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:22:16,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1397 transitions. [2023-08-26 12:22:16,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 465.6666666666667) internal successors, (1397), 3 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:22:16,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1251.0) internal successors, (5004), 4 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:22:16,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1251.0) internal successors, (5004), 4 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:22:16,236 INFO L175 Difference]: Start difference. First operand has 154 places, 198 transitions, 833 flow. Second operand 3 states and 1397 transitions. [2023-08-26 12:22:16,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 311 transitions, 1754 flow [2023-08-26 12:22:16,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 311 transitions, 1696 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 12:22:16,438 INFO L231 Difference]: Finished difference. Result has 155 places, 204 transitions, 836 flow [2023-08-26 12:22:16,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1251, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=836, PETRI_PLACES=155, PETRI_TRANSITIONS=204} [2023-08-26 12:22:16,439 INFO L281 CegarLoopForPetriNet]: 190 programPoint places, -35 predicate places. [2023-08-26 12:22:16,439 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 204 transitions, 836 flow [2023-08-26 12:22:16,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 384.3333333333333) internal successors, (1153), 3 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:22:16,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:22:16,439 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-26 12:22:16,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 12:22:16,439 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 175 more)] === [2023-08-26 12:22:16,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:22:16,439 INFO L85 PathProgramCache]: Analyzing trace with hash -683364197, now seen corresponding path program 2 times [2023-08-26 12:22:16,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:22:16,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912473254] [2023-08-26 12:22:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:22:16,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:22:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:22:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:22:16,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:22:16,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912473254] [2023-08-26 12:22:16,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912473254] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:22:16,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137048969] [2023-08-26 12:22:16,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 12:22:16,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:22:16,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:22:16,530 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:22:16,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 12:22:16,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 12:22:16,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:22:16,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 12:22:16,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:22:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 12:22:16,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 12:22:16,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137048969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:22:16,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 12:22:16,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2023-08-26 12:22:16,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276403204] [2023-08-26 12:22:16,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:22:16,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:22:16,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:22:16,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:22:16,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-08-26 12:22:16,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 445 out of 1251 [2023-08-26 12:22:16,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 204 transitions, 836 flow. Second operand has 5 states, 5 states have (on average 446.2) internal successors, (2231), 5 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:22:16,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:22:16,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 445 of 1251 [2023-08-26 12:22:16,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand