/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread/bigshot_s2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 14:08:03,005 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 14:08:03,071 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 14:08:03,075 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 14:08:03,076 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 14:08:03,101 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 14:08:03,102 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 14:08:03,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 14:08:03,107 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 14:08:03,109 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 14:08:03,110 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 14:08:03,110 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 14:08:03,110 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 14:08:03,111 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 14:08:03,111 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 14:08:03,111 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 14:08:03,111 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 14:08:03,112 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 14:08:03,112 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 14:08:03,112 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 14:08:03,112 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 14:08:03,113 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 14:08:03,113 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 14:08:03,113 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 14:08:03,114 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 14:08:03,114 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 14:08:03,114 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 14:08:03,114 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 14:08:03,114 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 14:08:03,114 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 14:08:03,115 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 14:08:03,115 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 14:08:03,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 14:08:03,115 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 14:08:03,116 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 14:08:03,116 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 14:08:03,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 14:08:03,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 14:08:03,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 14:08:03,456 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 14:08:03,456 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 14:08:03,457 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s2.i [2023-08-26 14:08:04,399 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 14:08:04,679 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 14:08:04,679 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.i [2023-08-26 14:08:04,694 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/524913bec/d6e43e416370447abfde68788243455b/FLAGa672b31b4 [2023-08-26 14:08:04,717 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/524913bec/d6e43e416370447abfde68788243455b [2023-08-26 14:08:04,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 14:08:04,721 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 14:08:04,722 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 14:08:04,722 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 14:08:04,724 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 14:08:04,725 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:08:04" (1/1) ... [2023-08-26 14:08:04,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db56bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:04, skipping insertion in model container [2023-08-26 14:08:04,725 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:08:04" (1/1) ... [2023-08-26 14:08:04,773 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 14:08:05,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 14:08:05,097 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 14:08:05,120 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [274] [2023-08-26 14:08:05,122 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [274] [2023-08-26 14:08:05,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 14:08:05,195 INFO L206 MainTranslator]: Completed translation [2023-08-26 14:08:05,195 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:05 WrapperNode [2023-08-26 14:08:05,195 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 14:08:05,196 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 14:08:05,196 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 14:08:05,196 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 14:08:05,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:05" (1/1) ... [2023-08-26 14:08:05,226 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:05" (1/1) ... [2023-08-26 14:08:05,247 INFO L138 Inliner]: procedures = 323, calls = 34, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2023-08-26 14:08:05,248 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 14:08:05,248 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 14:08:05,249 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 14:08:05,249 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 14:08:05,254 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:05" (1/1) ... [2023-08-26 14:08:05,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:05" (1/1) ... [2023-08-26 14:08:05,263 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:05" (1/1) ... [2023-08-26 14:08:05,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:05" (1/1) ... [2023-08-26 14:08:05,272 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:05" (1/1) ... [2023-08-26 14:08:05,277 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:05" (1/1) ... [2023-08-26 14:08:05,278 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:05" (1/1) ... [2023-08-26 14:08:05,279 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:05" (1/1) ... [2023-08-26 14:08:05,280 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 14:08:05,281 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 14:08:05,281 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 14:08:05,281 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 14:08:05,281 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:05" (1/1) ... [2023-08-26 14:08:05,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 14:08:05,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:08:05,342 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 14:08:05,351 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 14:08:05,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 14:08:05,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 14:08:05,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-08-26 14:08:05,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 14:08:05,378 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 14:08:05,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 14:08:05,378 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 14:08:05,379 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 14:08:05,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 14:08:05,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-26 14:08:05,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 14:08:05,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 14:08:05,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 14:08:05,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 14:08:05,380 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 14:08:05,480 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 14:08:05,482 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 14:08:05,680 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 14:08:05,685 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 14:08:05,685 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 14:08:05,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:08:05 BoogieIcfgContainer [2023-08-26 14:08:05,687 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 14:08:05,688 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 14:08:05,688 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 14:08:05,690 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 14:08:05,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:08:04" (1/3) ... [2023-08-26 14:08:05,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dbb951b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:08:05, skipping insertion in model container [2023-08-26 14:08:05,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:05" (2/3) ... [2023-08-26 14:08:05,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dbb951b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:08:05, skipping insertion in model container [2023-08-26 14:08:05,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:08:05" (3/3) ... [2023-08-26 14:08:05,694 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2023-08-26 14:08:05,730 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 14:08:05,730 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-26 14:08:05,730 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 14:08:05,804 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 14:08:05,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 106 transitions, 228 flow [2023-08-26 14:08:05,875 INFO L124 PetriNetUnfolderBase]: 5/104 cut-off events. [2023-08-26 14:08:05,875 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 14:08:05,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 104 events. 5/104 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 132 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 68. Up to 2 conditions per place. [2023-08-26 14:08:05,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 106 transitions, 228 flow [2023-08-26 14:08:05,886 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 91 transitions, 194 flow [2023-08-26 14:08:05,888 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 14:08:05,902 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 91 transitions, 194 flow [2023-08-26 14:08:05,907 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 91 transitions, 194 flow [2023-08-26 14:08:05,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 91 transitions, 194 flow [2023-08-26 14:08:05,926 INFO L124 PetriNetUnfolderBase]: 3/91 cut-off events. [2023-08-26 14:08:05,926 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 14:08:05,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 91 events. 3/91 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 113 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2023-08-26 14:08:05,926 INFO L119 LiptonReduction]: Number of co-enabled transitions 340 [2023-08-26 14:08:08,744 INFO L134 LiptonReduction]: Checked pairs total: 461 [2023-08-26 14:08:08,744 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-26 14:08:08,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 14:08:08,765 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;@17359bd6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 14:08:08,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-08-26 14:08:08,766 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 14:08:08,766 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 14:08:08,766 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:08:08,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:08,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 14:08:08,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:08,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:08,771 INFO L85 PathProgramCache]: Analyzing trace with hash 396, now seen corresponding path program 1 times [2023-08-26 14:08:08,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:08,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367181323] [2023-08-26 14:08:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:08,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:08,862 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 14:08:08,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:08,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367181323] [2023-08-26 14:08:08,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367181323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:08,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:08,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 14:08:08,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368866066] [2023-08-26 14:08:08,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:08,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 14:08:08,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:08,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 14:08:08,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 14:08:08,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 202 [2023-08-26 14:08:08,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 72 flow. Second operand has 2 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:08,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:08,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 202 [2023-08-26 14:08:08,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:08,955 INFO L124 PetriNetUnfolderBase]: 26/71 cut-off events. [2023-08-26 14:08:08,955 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 14:08:08,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 71 events. 26/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 206 event pairs, 18 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 115. Up to 68 conditions per place. [2023-08-26 14:08:08,956 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 25 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-08-26 14:08:08,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 114 flow [2023-08-26 14:08:08,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 14:08:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 14:08:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 225 transitions. [2023-08-26 14:08:08,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556930693069307 [2023-08-26 14:08:08,969 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 225 transitions. [2023-08-26 14:08:08,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 225 transitions. [2023-08-26 14:08:08,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:08,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 225 transitions. [2023-08-26 14:08:08,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:08,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:08,980 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:08,981 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 72 flow. Second operand 2 states and 225 transitions. [2023-08-26 14:08:08,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 114 flow [2023-08-26 14:08:08,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 106 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 14:08:08,985 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 56 flow [2023-08-26 14:08:08,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2023-08-26 14:08:08,988 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -7 predicate places. [2023-08-26 14:08:08,988 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 56 flow [2023-08-26 14:08:08,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:08,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:08,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 14:08:08,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 14:08:08,989 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:08,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:08,990 INFO L85 PathProgramCache]: Analyzing trace with hash 391151, now seen corresponding path program 1 times [2023-08-26 14:08:08,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:08,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243167206] [2023-08-26 14:08:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:08,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:09,153 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 14:08:09,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:09,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243167206] [2023-08-26 14:08:09,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243167206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:09,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:09,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:08:09,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075959913] [2023-08-26 14:08:09,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:09,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:08:09,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:09,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:08:09,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:08:09,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 202 [2023-08-26 14:08:09,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:09,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 202 [2023-08-26 14:08:09,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:09,200 INFO L124 PetriNetUnfolderBase]: 28/71 cut-off events. [2023-08-26 14:08:09,200 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:08:09,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 71 events. 28/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 200 event pairs, 20 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 144. Up to 71 conditions per place. [2023-08-26 14:08:09,202 INFO L140 encePairwiseOnDemand]: 200/202 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-26 14:08:09,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 104 flow [2023-08-26 14:08:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-08-26 14:08:09,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844884488448845 [2023-08-26 14:08:09,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-08-26 14:08:09,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-08-26 14:08:09,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:09,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-08-26 14:08:09,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,212 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 56 flow. Second operand 3 states and 233 transitions. [2023-08-26 14:08:09,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 104 flow [2023-08-26 14:08:09,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 25 transitions, 104 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 14:08:09,213 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 56 flow [2023-08-26 14:08:09,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-08-26 14:08:09,214 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -6 predicate places. [2023-08-26 14:08:09,216 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 56 flow [2023-08-26 14:08:09,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:09,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 14:08:09,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 14:08:09,217 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:09,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:09,218 INFO L85 PathProgramCache]: Analyzing trace with hash 391152, now seen corresponding path program 1 times [2023-08-26 14:08:09,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:09,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953663877] [2023-08-26 14:08:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:09,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:09,316 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 14:08:09,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:09,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953663877] [2023-08-26 14:08:09,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953663877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:09,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:09,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:08:09,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134811034] [2023-08-26 14:08:09,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:09,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:08:09,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:08:09,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:08:09,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 202 [2023-08-26 14:08:09,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:09,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 202 [2023-08-26 14:08:09,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:09,355 INFO L124 PetriNetUnfolderBase]: 24/66 cut-off events. [2023-08-26 14:08:09,355 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:08:09,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 66 events. 24/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 192 event pairs, 15 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 131. Up to 60 conditions per place. [2023-08-26 14:08:09,356 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 23 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-26 14:08:09,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 108 flow [2023-08-26 14:08:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:09,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-08-26 14:08:09,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943894389438944 [2023-08-26 14:08:09,357 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-08-26 14:08:09,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-08-26 14:08:09,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:09,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-08-26 14:08:09,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,360 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 56 flow. Second operand 3 states and 239 transitions. [2023-08-26 14:08:09,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 108 flow [2023-08-26 14:08:09,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:09,361 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 63 flow [2023-08-26 14:08:09,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2023-08-26 14:08:09,361 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2023-08-26 14:08:09,361 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 63 flow [2023-08-26 14:08:09,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:09,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 14:08:09,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 14:08:09,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:09,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:09,362 INFO L85 PathProgramCache]: Analyzing trace with hash 12126605, now seen corresponding path program 1 times [2023-08-26 14:08:09,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:09,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59794913] [2023-08-26 14:08:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:09,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:09,487 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 14:08:09,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:09,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59794913] [2023-08-26 14:08:09,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59794913] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:09,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:09,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:08:09,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173597713] [2023-08-26 14:08:09,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:09,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:08:09,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:09,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:08:09,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:08:09,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 202 [2023-08-26 14:08:09,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 63 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:09,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 202 [2023-08-26 14:08:09,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:09,521 INFO L124 PetriNetUnfolderBase]: 24/65 cut-off events. [2023-08-26 14:08:09,521 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 14:08:09,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 65 events. 24/65 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 190 event pairs, 16 based on Foata normal form. 1/30 useless extension candidates. Maximal degree in co-relation 134. Up to 61 conditions per place. [2023-08-26 14:08:09,522 INFO L140 encePairwiseOnDemand]: 200/202 looper letters, 22 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-26 14:08:09,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 24 transitions, 105 flow [2023-08-26 14:08:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-08-26 14:08:09,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38613861386138615 [2023-08-26 14:08:09,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-08-26 14:08:09,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-08-26 14:08:09,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:09,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-08-26 14:08:09,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,525 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,526 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 63 flow. Second operand 3 states and 234 transitions. [2023-08-26 14:08:09,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 24 transitions, 105 flow [2023-08-26 14:08:09,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 14:08:09,526 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 55 flow [2023-08-26 14:08:09,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-08-26 14:08:09,527 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -6 predicate places. [2023-08-26 14:08:09,527 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 55 flow [2023-08-26 14:08:09,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:09,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 14:08:09,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 14:08:09,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:09,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:09,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1231227698, now seen corresponding path program 1 times [2023-08-26 14:08:09,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:09,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727408865] [2023-08-26 14:08:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:09,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:09,572 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 14:08:09,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:09,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727408865] [2023-08-26 14:08:09,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727408865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:09,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:09,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:08:09,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90899706] [2023-08-26 14:08:09,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:09,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:08:09,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:08:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:08:09,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 202 [2023-08-26 14:08:09,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:09,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 202 [2023-08-26 14:08:09,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:09,597 INFO L124 PetriNetUnfolderBase]: 19/52 cut-off events. [2023-08-26 14:08:09,597 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:08:09,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 52 events. 19/52 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 129 event pairs, 13 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 108. Up to 52 conditions per place. [2023-08-26 14:08:09,598 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 21 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-26 14:08:09,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 95 flow [2023-08-26 14:08:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:09,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2023-08-26 14:08:09,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3811881188118812 [2023-08-26 14:08:09,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2023-08-26 14:08:09,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2023-08-26 14:08:09,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:09,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2023-08-26 14:08:09,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,601 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 55 flow. Second operand 3 states and 231 transitions. [2023-08-26 14:08:09,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 95 flow [2023-08-26 14:08:09,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 22 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:09,602 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 52 flow [2023-08-26 14:08:09,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-26 14:08:09,602 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -7 predicate places. [2023-08-26 14:08:09,602 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 52 flow [2023-08-26 14:08:09,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:09,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 14:08:09,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 14:08:09,603 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:09,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:09,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1231804297, now seen corresponding path program 1 times [2023-08-26 14:08:09,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:09,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242102952] [2023-08-26 14:08:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:09,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:09,670 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 14:08:09,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:09,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242102952] [2023-08-26 14:08:09,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242102952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:09,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:09,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:08:09,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911934324] [2023-08-26 14:08:09,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:09,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:08:09,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:09,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:08:09,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:08:09,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 202 [2023-08-26 14:08:09,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 62.5) internal successors, (250), 4 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:09,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 202 [2023-08-26 14:08:09,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:09,698 INFO L124 PetriNetUnfolderBase]: 11/36 cut-off events. [2023-08-26 14:08:09,698 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:08:09,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 36 events. 11/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 68 event pairs, 7 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 77. Up to 36 conditions per place. [2023-08-26 14:08:09,698 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 19 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-26 14:08:09,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 88 flow [2023-08-26 14:08:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 205 transitions. [2023-08-26 14:08:09,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33828382838283827 [2023-08-26 14:08:09,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 205 transitions. [2023-08-26 14:08:09,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 205 transitions. [2023-08-26 14:08:09,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:09,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 205 transitions. [2023-08-26 14:08:09,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,701 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 52 flow. Second operand 3 states and 205 transitions. [2023-08-26 14:08:09,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 88 flow [2023-08-26 14:08:09,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 20 transitions, 87 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:09,702 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 49 flow [2023-08-26 14:08:09,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-26 14:08:09,703 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -8 predicate places. [2023-08-26 14:08:09,703 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 49 flow [2023-08-26 14:08:09,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.5) internal successors, (250), 4 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:09,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:09,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 14:08:09,703 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:09,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:09,703 INFO L85 PathProgramCache]: Analyzing trace with hash -481026738, now seen corresponding path program 1 times [2023-08-26 14:08:09,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:09,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969079086] [2023-08-26 14:08:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:09,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:09,806 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 14:08:09,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:09,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969079086] [2023-08-26 14:08:09,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969079086] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:09,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:09,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 14:08:09,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572508421] [2023-08-26 14:08:09,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:09,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 14:08:09,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:09,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 14:08:09,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 14:08:09,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 202 [2023-08-26 14:08:09,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 49 flow. Second operand has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:09,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 202 [2023-08-26 14:08:09,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:09,868 INFO L124 PetriNetUnfolderBase]: 9/38 cut-off events. [2023-08-26 14:08:09,868 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:08:09,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 38 events. 9/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 72 event pairs, 2 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 82. Up to 21 conditions per place. [2023-08-26 14:08:09,869 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 22 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-26 14:08:09,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 106 flow [2023-08-26 14:08:09,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 14:08:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 14:08:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2023-08-26 14:08:09,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3378712871287129 [2023-08-26 14:08:09,870 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 273 transitions. [2023-08-26 14:08:09,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 273 transitions. [2023-08-26 14:08:09,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:09,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 273 transitions. [2023-08-26 14:08:09,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,872 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,872 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 49 flow. Second operand 4 states and 273 transitions. [2023-08-26 14:08:09,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 106 flow [2023-08-26 14:08:09,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 105 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:09,873 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 50 flow [2023-08-26 14:08:09,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=50, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-26 14:08:09,873 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -7 predicate places. [2023-08-26 14:08:09,874 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 50 flow [2023-08-26 14:08:09,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:09,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:09,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 14:08:09,874 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:09,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:09,874 INFO L85 PathProgramCache]: Analyzing trace with hash -481026659, now seen corresponding path program 1 times [2023-08-26 14:08:09,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:09,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751085948] [2023-08-26 14:08:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:09,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:09,937 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 14:08:09,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:09,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751085948] [2023-08-26 14:08:09,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751085948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:09,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:09,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 14:08:09,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325468230] [2023-08-26 14:08:09,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:09,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:08:09,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:09,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:08:09,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:08:09,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 202 [2023-08-26 14:08:09,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 50 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:09,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 202 [2023-08-26 14:08:09,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:09,982 INFO L124 PetriNetUnfolderBase]: 13/51 cut-off events. [2023-08-26 14:08:09,982 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 14:08:09,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 51 events. 13/51 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 142 event pairs, 6 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 111. Up to 33 conditions per place. [2023-08-26 14:08:09,983 INFO L140 encePairwiseOnDemand]: 197/202 looper letters, 24 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-08-26 14:08:09,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 121 flow [2023-08-26 14:08:09,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 14:08:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 14:08:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 282 transitions. [2023-08-26 14:08:09,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.349009900990099 [2023-08-26 14:08:09,984 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 282 transitions. [2023-08-26 14:08:09,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 282 transitions. [2023-08-26 14:08:09,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:09,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 282 transitions. [2023-08-26 14:08:09,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,986 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,986 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 50 flow. Second operand 4 states and 282 transitions. [2023-08-26 14:08:09,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 121 flow [2023-08-26 14:08:09,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 14:08:09,987 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 59 flow [2023-08-26 14:08:09,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=59, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-26 14:08:09,988 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -6 predicate places. [2023-08-26 14:08:09,988 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 59 flow [2023-08-26 14:08:09,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:09,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:09,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:09,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 14:08:09,988 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:09,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash -481026705, now seen corresponding path program 1 times [2023-08-26 14:08:09,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:09,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069198710] [2023-08-26 14:08:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:09,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:10,137 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 14:08:10,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:10,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069198710] [2023-08-26 14:08:10,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069198710] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:10,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:10,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 14:08:10,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9244634] [2023-08-26 14:08:10,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:10,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 14:08:10,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:10,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 14:08:10,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 14:08:10,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 202 [2023-08-26 14:08:10,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 19 transitions, 59 flow. Second operand has 6 states, 6 states have (on average 60.5) internal successors, (363), 6 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:10,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 202 [2023-08-26 14:08:10,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:10,202 INFO L124 PetriNetUnfolderBase]: 12/48 cut-off events. [2023-08-26 14:08:10,202 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 14:08:10,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 48 events. 12/48 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 115 event pairs, 7 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 116. Up to 36 conditions per place. [2023-08-26 14:08:10,203 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 22 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2023-08-26 14:08:10,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 122 flow [2023-08-26 14:08:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 14:08:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 14:08:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 262 transitions. [2023-08-26 14:08:10,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32425742574257427 [2023-08-26 14:08:10,204 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 262 transitions. [2023-08-26 14:08:10,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 262 transitions. [2023-08-26 14:08:10,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:10,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 262 transitions. [2023-08-26 14:08:10,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,206 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,206 INFO L175 Difference]: Start difference. First operand has 29 places, 19 transitions, 59 flow. Second operand 4 states and 262 transitions. [2023-08-26 14:08:10,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 122 flow [2023-08-26 14:08:10,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 14:08:10,207 INFO L231 Difference]: Finished difference. Result has 31 places, 19 transitions, 65 flow [2023-08-26 14:08:10,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=65, PETRI_PLACES=31, PETRI_TRANSITIONS=19} [2023-08-26 14:08:10,207 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2023-08-26 14:08:10,208 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 19 transitions, 65 flow [2023-08-26 14:08:10,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.5) internal successors, (363), 6 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:10,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:10,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 14:08:10,208 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:10,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:10,208 INFO L85 PathProgramCache]: Analyzing trace with hash -483405242, now seen corresponding path program 1 times [2023-08-26 14:08:10,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:10,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209732750] [2023-08-26 14:08:10,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:10,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:10,254 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 14:08:10,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:10,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209732750] [2023-08-26 14:08:10,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209732750] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:10,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:10,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 14:08:10,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635629387] [2023-08-26 14:08:10,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:10,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:08:10,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:10,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:08:10,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:08:10,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 202 [2023-08-26 14:08:10,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 19 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:10,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 202 [2023-08-26 14:08:10,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:10,283 INFO L124 PetriNetUnfolderBase]: 10/39 cut-off events. [2023-08-26 14:08:10,283 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 14:08:10,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 39 events. 10/39 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 82 event pairs, 1 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 103. Up to 24 conditions per place. [2023-08-26 14:08:10,283 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-08-26 14:08:10,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 21 transitions, 112 flow [2023-08-26 14:08:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 14:08:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 14:08:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 275 transitions. [2023-08-26 14:08:10,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34034653465346537 [2023-08-26 14:08:10,285 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 275 transitions. [2023-08-26 14:08:10,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 275 transitions. [2023-08-26 14:08:10,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:10,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 275 transitions. [2023-08-26 14:08:10,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,286 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,287 INFO L175 Difference]: Start difference. First operand has 31 places, 19 transitions, 65 flow. Second operand 4 states and 275 transitions. [2023-08-26 14:08:10,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 21 transitions, 112 flow [2023-08-26 14:08:10,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 21 transitions, 106 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 14:08:10,287 INFO L231 Difference]: Finished difference. Result has 29 places, 17 transitions, 59 flow [2023-08-26 14:08:10,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=59, PETRI_PLACES=29, PETRI_TRANSITIONS=17} [2023-08-26 14:08:10,288 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -6 predicate places. [2023-08-26 14:08:10,288 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 17 transitions, 59 flow [2023-08-26 14:08:10,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:10,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:10,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 14:08:10,288 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:10,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:10,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2026923222, now seen corresponding path program 1 times [2023-08-26 14:08:10,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:10,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678416045] [2023-08-26 14:08:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:10,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:10,381 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 14:08:10,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:10,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678416045] [2023-08-26 14:08:10,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678416045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:08:10,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506123463] [2023-08-26 14:08:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:10,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:08:10,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:08:10,389 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 14:08:10,443 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 14:08:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:10,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 14:08:10,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:08:10,550 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 14:08:10,594 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 14:08:10,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:08:10,654 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 14:08:10,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506123463] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:08:10,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:08:10,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-26 14:08:10,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868099735] [2023-08-26 14:08:10,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:08:10,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 14:08:10,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 14:08:10,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-26 14:08:10,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 202 [2023-08-26 14:08:10,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 17 transitions, 59 flow. Second operand has 11 states, 11 states have (on average 65.18181818181819) internal successors, (717), 11 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:10,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 202 [2023-08-26 14:08:10,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:10,790 INFO L124 PetriNetUnfolderBase]: 20/69 cut-off events. [2023-08-26 14:08:10,790 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 14:08:10,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 69 events. 20/69 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 199 event pairs, 4 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 174. Up to 23 conditions per place. [2023-08-26 14:08:10,791 INFO L140 encePairwiseOnDemand]: 197/202 looper letters, 33 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2023-08-26 14:08:10,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 201 flow [2023-08-26 14:08:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 14:08:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 14:08:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 484 transitions. [2023-08-26 14:08:10,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3422913719943423 [2023-08-26 14:08:10,792 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 484 transitions. [2023-08-26 14:08:10,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 484 transitions. [2023-08-26 14:08:10,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:10,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 484 transitions. [2023-08-26 14:08:10,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.14285714285714) internal successors, (484), 7 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 202.0) internal successors, (1616), 8 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,795 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 202.0) internal successors, (1616), 8 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,795 INFO L175 Difference]: Start difference. First operand has 29 places, 17 transitions, 59 flow. Second operand 7 states and 484 transitions. [2023-08-26 14:08:10,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 201 flow [2023-08-26 14:08:10,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 14:08:10,797 INFO L231 Difference]: Finished difference. Result has 37 places, 21 transitions, 105 flow [2023-08-26 14:08:10,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=105, PETRI_PLACES=37, PETRI_TRANSITIONS=21} [2023-08-26 14:08:10,797 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-26 14:08:10,797 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 21 transitions, 105 flow [2023-08-26 14:08:10,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 65.18181818181819) internal successors, (717), 11 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:10,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:10,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:10,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 14:08:11,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-26 14:08:11,018 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:11,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:11,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2026923268, now seen corresponding path program 1 times [2023-08-26 14:08:11,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:11,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674805279] [2023-08-26 14:08:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:11,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:11,252 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 14:08:11,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:11,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674805279] [2023-08-26 14:08:11,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674805279] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:08:11,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764009990] [2023-08-26 14:08:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:11,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:08:11,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:08:11,254 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 14:08:11,269 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 14:08:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:11,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-26 14:08:11,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:08:11,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:08:11,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:08:11,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:08:11,339 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-26 14:08:11,363 INFO L322 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-08-26 14:08:11,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-08-26 14:08:11,412 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-26 14:08:11,412 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 14:08:11,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 14:08:11,468 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 14:08:11,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:08:11,534 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 14:08:11,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764009990] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:08:11,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:08:11,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2023-08-26 14:08:11,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31691299] [2023-08-26 14:08:11,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:08:11,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 14:08:11,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 14:08:11,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-08-26 14:08:11,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 202 [2023-08-26 14:08:11,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 21 transitions, 105 flow. Second operand has 16 states, 16 states have (on average 51.875) internal successors, (830), 16 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:11,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:11,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 202 [2023-08-26 14:08:11,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:11,802 INFO L124 PetriNetUnfolderBase]: 17/60 cut-off events. [2023-08-26 14:08:11,802 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-26 14:08:11,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 60 events. 17/60 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 4 based on Foata normal form. 6/66 useless extension candidates. Maximal degree in co-relation 188. Up to 23 conditions per place. [2023-08-26 14:08:11,803 INFO L140 encePairwiseOnDemand]: 196/202 looper letters, 28 selfloop transitions, 8 changer transitions 0/36 dead transitions. [2023-08-26 14:08:11,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 217 flow [2023-08-26 14:08:11,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 14:08:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 14:08:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 389 transitions. [2023-08-26 14:08:11,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2751060820367751 [2023-08-26 14:08:11,805 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 389 transitions. [2023-08-26 14:08:11,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 389 transitions. [2023-08-26 14:08:11,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:11,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 389 transitions. [2023-08-26 14:08:11,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:11,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 202.0) internal successors, (1616), 8 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:11,807 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 202.0) internal successors, (1616), 8 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:11,807 INFO L175 Difference]: Start difference. First operand has 37 places, 21 transitions, 105 flow. Second operand 7 states and 389 transitions. [2023-08-26 14:08:11,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 217 flow [2023-08-26 14:08:11,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 208 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-26 14:08:11,809 INFO L231 Difference]: Finished difference. Result has 44 places, 21 transitions, 126 flow [2023-08-26 14:08:11,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=126, PETRI_PLACES=44, PETRI_TRANSITIONS=21} [2023-08-26 14:08:11,809 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 9 predicate places. [2023-08-26 14:08:11,810 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 21 transitions, 126 flow [2023-08-26 14:08:11,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 51.875) internal successors, (830), 16 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:11,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:11,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:11,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-26 14:08:12,015 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,SelfDestructingSolverStorable11 [2023-08-26 14:08:12,015 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONASSERT === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:12,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:12,016 INFO L85 PathProgramCache]: Analyzing trace with hash -696631613, now seen corresponding path program 1 times [2023-08-26 14:08:12,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:12,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946668133] [2023-08-26 14:08:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:12,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:12,042 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 14:08:12,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:12,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946668133] [2023-08-26 14:08:12,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946668133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:12,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:12,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 14:08:12,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693130444] [2023-08-26 14:08:12,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:12,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:08:12,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:12,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:08:12,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:08:12,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 202 [2023-08-26 14:08:12,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 21 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:12,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:12,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 202 [2023-08-26 14:08:12,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:12,066 INFO L124 PetriNetUnfolderBase]: 16/55 cut-off events. [2023-08-26 14:08:12,066 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-08-26 14:08:12,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 55 events. 16/55 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 120 event pairs, 11 based on Foata normal form. 2/57 useless extension candidates. Maximal degree in co-relation 197. Up to 52 conditions per place. [2023-08-26 14:08:12,067 INFO L140 encePairwiseOnDemand]: 200/202 looper letters, 20 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-08-26 14:08:12,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 21 transitions, 168 flow [2023-08-26 14:08:12,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:12,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:12,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-08-26 14:08:12,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735973597359736 [2023-08-26 14:08:12,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-08-26 14:08:12,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-08-26 14:08:12,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:12,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-08-26 14:08:12,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:12,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:12,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:12,070 INFO L175 Difference]: Start difference. First operand has 44 places, 21 transitions, 126 flow. Second operand 3 states and 287 transitions. [2023-08-26 14:08:12,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 21 transitions, 168 flow [2023-08-26 14:08:12,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 21 transitions, 144 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-08-26 14:08:12,074 INFO L231 Difference]: Finished difference. Result has 38 places, 20 transitions, 102 flow [2023-08-26 14:08:12,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=38, PETRI_TRANSITIONS=20} [2023-08-26 14:08:12,075 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-08-26 14:08:12,075 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 20 transitions, 102 flow [2023-08-26 14:08:12,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:12,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:12,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:12,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 14:08:12,076 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONASSERT === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:12,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:12,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2020530838, now seen corresponding path program 1 times [2023-08-26 14:08:12,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:12,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182357335] [2023-08-26 14:08:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:12,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:12,279 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 14:08:12,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:12,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182357335] [2023-08-26 14:08:12,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182357335] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:12,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:12,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 14:08:12,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786913872] [2023-08-26 14:08:12,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:12,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 14:08:12,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:12,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 14:08:12,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 14:08:12,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 202 [2023-08-26 14:08:12,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 20 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 46.5) internal successors, (372), 8 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:12,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:12,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 202 [2023-08-26 14:08:12,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:12,365 INFO L124 PetriNetUnfolderBase]: 15/50 cut-off events. [2023-08-26 14:08:12,365 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-26 14:08:12,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 50 events. 15/50 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 93 event pairs, 1 based on Foata normal form. 2/52 useless extension candidates. Maximal degree in co-relation 163. Up to 35 conditions per place. [2023-08-26 14:08:12,366 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 19 selfloop transitions, 5 changer transitions 0/24 dead transitions. [2023-08-26 14:08:12,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 24 transitions, 160 flow [2023-08-26 14:08:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 14:08:12,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 14:08:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 247 transitions. [2023-08-26 14:08:12,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24455445544554455 [2023-08-26 14:08:12,367 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 247 transitions. [2023-08-26 14:08:12,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 247 transitions. [2023-08-26 14:08:12,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:12,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 247 transitions. [2023-08-26 14:08:12,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:12,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:12,369 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:12,369 INFO L175 Difference]: Start difference. First operand has 38 places, 20 transitions, 102 flow. Second operand 5 states and 247 transitions. [2023-08-26 14:08:12,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 24 transitions, 160 flow [2023-08-26 14:08:12,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 24 transitions, 157 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:12,370 INFO L231 Difference]: Finished difference. Result has 43 places, 21 transitions, 122 flow [2023-08-26 14:08:12,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=43, PETRI_TRANSITIONS=21} [2023-08-26 14:08:12,370 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2023-08-26 14:08:12,371 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 21 transitions, 122 flow [2023-08-26 14:08:12,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 46.5) internal successors, (372), 8 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:12,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:12,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:12,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 14:08:12,371 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONASSERT === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:12,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:12,371 INFO L85 PathProgramCache]: Analyzing trace with hash 562865905, now seen corresponding path program 1 times [2023-08-26 14:08:12,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:12,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526037582] [2023-08-26 14:08:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:12,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:12,634 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 14:08:12,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:12,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526037582] [2023-08-26 14:08:12,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526037582] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:08:12,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779190248] [2023-08-26 14:08:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:12,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:08:12,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:08:12,649 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 14:08:12,650 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 14:08:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:12,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-26 14:08:12,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:08:12,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:08:12,750 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 14:08:12,765 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 14:08:12,765 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-26 14:08:12,807 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 14:08:12,869 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-26 14:08:12,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-08-26 14:08:12,902 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-26 14:08:12,902 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-26 14:08:12,924 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 14:08:12,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:08:13,028 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 14:08:13,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779190248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:08:13,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:08:13,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 17 [2023-08-26 14:08:13,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254672713] [2023-08-26 14:08:13,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:08:13,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 14:08:13,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:13,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 14:08:13,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-08-26 14:08:13,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 202 [2023-08-26 14:08:13,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 21 transitions, 122 flow. Second operand has 18 states, 18 states have (on average 42.05555555555556) internal successors, (757), 18 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:13,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:13,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 202 [2023-08-26 14:08:13,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:13,371 INFO L124 PetriNetUnfolderBase]: 22/70 cut-off events. [2023-08-26 14:08:13,371 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2023-08-26 14:08:13,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 70 events. 22/70 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 171 event pairs, 1 based on Foata normal form. 5/75 useless extension candidates. Maximal degree in co-relation 254. Up to 19 conditions per place. [2023-08-26 14:08:13,371 INFO L140 encePairwiseOnDemand]: 197/202 looper letters, 24 selfloop transitions, 9 changer transitions 5/38 dead transitions. [2023-08-26 14:08:13,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 277 flow [2023-08-26 14:08:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 14:08:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 14:08:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 401 transitions. [2023-08-26 14:08:13,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22057205720572057 [2023-08-26 14:08:13,374 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 401 transitions. [2023-08-26 14:08:13,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 401 transitions. [2023-08-26 14:08:13,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:13,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 401 transitions. [2023-08-26 14:08:13,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 44.55555555555556) internal successors, (401), 9 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:13,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:13,377 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:13,377 INFO L175 Difference]: Start difference. First operand has 43 places, 21 transitions, 122 flow. Second operand 9 states and 401 transitions. [2023-08-26 14:08:13,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 277 flow [2023-08-26 14:08:13,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 38 transitions, 267 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-26 14:08:13,378 INFO L231 Difference]: Finished difference. Result has 50 places, 22 transitions, 149 flow [2023-08-26 14:08:13,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=149, PETRI_PLACES=50, PETRI_TRANSITIONS=22} [2023-08-26 14:08:13,379 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 15 predicate places. [2023-08-26 14:08:13,379 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 22 transitions, 149 flow [2023-08-26 14:08:13,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 42.05555555555556) internal successors, (757), 18 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:13,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:13,379 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:13,399 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 14:08:13,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:08:13,584 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:13,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:13,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1227798917, now seen corresponding path program 2 times [2023-08-26 14:08:13,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:13,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749696391] [2023-08-26 14:08:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:13,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:08:13,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:13,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749696391] [2023-08-26 14:08:13,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749696391] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:08:13,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291887021] [2023-08-26 14:08:13,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 14:08:13,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:08:13,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:08:13,726 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 14:08:13,766 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 14:08:13,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 14:08:13,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:08:13,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-26 14:08:13,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:08:13,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:08:13,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:08:13,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:08:13,821 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-26 14:08:13,845 INFO L322 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-08-26 14:08:13,846 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-08-26 14:08:13,881 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-26 14:08:13,881 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 14:08:13,886 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 14:08:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-26 14:08:13,979 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 14:08:13,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291887021] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:13,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 14:08:13,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-08-26 14:08:13,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972928856] [2023-08-26 14:08:13,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:13,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 14:08:13,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:13,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 14:08:13,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-08-26 14:08:13,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 202 [2023-08-26 14:08:13,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 22 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:13,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:13,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 202 [2023-08-26 14:08:13,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:14,041 INFO L124 PetriNetUnfolderBase]: 17/53 cut-off events. [2023-08-26 14:08:14,041 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-08-26 14:08:14,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 53 events. 17/53 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 91 event pairs, 0 based on Foata normal form. 6/59 useless extension candidates. Maximal degree in co-relation 226. Up to 43 conditions per place. [2023-08-26 14:08:14,041 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 20 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-08-26 14:08:14,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 23 transitions, 193 flow [2023-08-26 14:08:14,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 14:08:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 14:08:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 297 transitions. [2023-08-26 14:08:14,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29405940594059404 [2023-08-26 14:08:14,043 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 297 transitions. [2023-08-26 14:08:14,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 297 transitions. [2023-08-26 14:08:14,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:14,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 297 transitions. [2023-08-26 14:08:14,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 59.4) internal successors, (297), 5 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:14,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:14,044 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:14,044 INFO L175 Difference]: Start difference. First operand has 50 places, 22 transitions, 149 flow. Second operand 5 states and 297 transitions. [2023-08-26 14:08:14,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 23 transitions, 193 flow [2023-08-26 14:08:14,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 23 transitions, 149 flow, removed 7 selfloop flow, removed 11 redundant places. [2023-08-26 14:08:14,045 INFO L231 Difference]: Finished difference. Result has 42 places, 21 transitions, 105 flow [2023-08-26 14:08:14,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=42, PETRI_TRANSITIONS=21} [2023-08-26 14:08:14,046 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2023-08-26 14:08:14,046 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 21 transitions, 105 flow [2023-08-26 14:08:14,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:14,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:14,046 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:14,060 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 14:08:14,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 14:08:14,250 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:14,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:14,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1123182417, now seen corresponding path program 2 times [2023-08-26 14:08:14,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:14,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565302370] [2023-08-26 14:08:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:14,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:08:14,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:14,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565302370] [2023-08-26 14:08:14,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565302370] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:08:14,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234505830] [2023-08-26 14:08:14,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 14:08:14,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:08:14,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:08:14,438 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 14:08:14,467 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 14:08:14,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 14:08:14,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:08:14,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-26 14:08:14,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:08:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:08:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:08:14,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:08:14,534 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-26 14:08:14,562 INFO L322 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-08-26 14:08:14,562 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-08-26 14:08:14,607 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-26 14:08:14,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-26 14:08:14,632 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-26 14:08:14,632 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 14:08:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:08:14,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:08:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:08:14,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234505830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:08:14,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:08:14,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-08-26 14:08:14,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365203899] [2023-08-26 14:08:14,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:08:14,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 14:08:14,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:14,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 14:08:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-08-26 14:08:14,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 202 [2023-08-26 14:08:14,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 21 transitions, 105 flow. Second operand has 24 states, 24 states have (on average 52.625) internal successors, (1263), 24 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:14,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:14,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 202 [2023-08-26 14:08:14,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:15,311 INFO L124 PetriNetUnfolderBase]: 19/63 cut-off events. [2023-08-26 14:08:15,311 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-26 14:08:15,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 63 events. 19/63 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 110 event pairs, 3 based on Foata normal form. 8/71 useless extension candidates. Maximal degree in co-relation 202. Up to 18 conditions per place. [2023-08-26 14:08:15,312 INFO L140 encePairwiseOnDemand]: 197/202 looper letters, 26 selfloop transitions, 11 changer transitions 2/39 dead transitions. [2023-08-26 14:08:15,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 39 transitions, 246 flow [2023-08-26 14:08:15,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 14:08:15,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 14:08:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 604 transitions. [2023-08-26 14:08:15,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27182718271827183 [2023-08-26 14:08:15,314 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 604 transitions. [2023-08-26 14:08:15,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 604 transitions. [2023-08-26 14:08:15,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:15,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 604 transitions. [2023-08-26 14:08:15,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 54.90909090909091) internal successors, (604), 11 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:15,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 202.0) internal successors, (2424), 12 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:15,317 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 202.0) internal successors, (2424), 12 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:15,317 INFO L175 Difference]: Start difference. First operand has 42 places, 21 transitions, 105 flow. Second operand 11 states and 604 transitions. [2023-08-26 14:08:15,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 39 transitions, 246 flow [2023-08-26 14:08:15,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 39 transitions, 239 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 14:08:15,319 INFO L231 Difference]: Finished difference. Result has 54 places, 24 transitions, 163 flow [2023-08-26 14:08:15,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=163, PETRI_PLACES=54, PETRI_TRANSITIONS=24} [2023-08-26 14:08:15,319 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-08-26 14:08:15,319 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 24 transitions, 163 flow [2023-08-26 14:08:15,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.625) internal successors, (1263), 24 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:15,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:15,320 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:15,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 14:08:15,524 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 14:08:15,524 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONASSERT === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:15,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:15,525 INFO L85 PathProgramCache]: Analyzing trace with hash 980407857, now seen corresponding path program 2 times [2023-08-26 14:08:15,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:15,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503141930] [2023-08-26 14:08:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:15,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:08:16,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:16,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503141930] [2023-08-26 14:08:16,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503141930] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:08:16,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834394559] [2023-08-26 14:08:16,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 14:08:16,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:08:16,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:08:16,009 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 14:08:16,011 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 14:08:16,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 14:08:16,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:08:16,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-26 14:08:16,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:08:16,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:08:16,108 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 14:08:16,117 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-26 14:08:16,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-26 14:08:16,162 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 14:08:16,234 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-08-26 14:08:16,235 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-08-26 14:08:16,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:08:16,287 INFO L322 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2023-08-26 14:08:16,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 40 [2023-08-26 14:08:16,367 INFO L322 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2023-08-26 14:08:16,368 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 59 [2023-08-26 14:08:16,486 INFO L322 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2023-08-26 14:08:16,486 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 73 [2023-08-26 14:08:16,618 INFO L322 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2023-08-26 14:08:16,618 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 87 [2023-08-26 14:08:16,802 INFO L322 Elim1Store]: treesize reduction 46, result has 35.2 percent of original size [2023-08-26 14:08:16,803 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 101 [2023-08-26 14:08:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:08:16,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:08:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 5 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:08:58,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834394559] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:08:58,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:08:58,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 30 [2023-08-26 14:08:58,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314278299] [2023-08-26 14:08:58,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:08:58,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-26 14:08:58,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-26 14:08:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=774, Unknown=22, NotChecked=0, Total=930 [2023-08-26 14:08:58,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 202 [2023-08-26 14:08:58,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 24 transitions, 163 flow. Second operand has 31 states, 31 states have (on average 40.58064516129032) internal successors, (1258), 31 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 14:08:58,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:58,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 202 [2023-08-26 14:08:58,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:59,580 INFO L124 PetriNetUnfolderBase]: 18/56 cut-off events. [2023-08-26 14:08:59,580 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-08-26 14:08:59,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 56 events. 18/56 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 1 based on Foata normal form. 4/60 useless extension candidates. Maximal degree in co-relation 225. Up to 24 conditions per place. [2023-08-26 14:08:59,581 INFO L140 encePairwiseOnDemand]: 197/202 looper letters, 18 selfloop transitions, 8 changer transitions 5/31 dead transitions. [2023-08-26 14:08:59,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 31 transitions, 239 flow [2023-08-26 14:08:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 14:08:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 14:08:59,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 420 transitions. [2023-08-26 14:08:59,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2079207920792079 [2023-08-26 14:08:59,586 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 420 transitions. [2023-08-26 14:08:59,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 420 transitions. [2023-08-26 14:08:59,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:59,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 420 transitions. [2023-08-26 14:08:59,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 42.0) internal successors, (420), 10 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:59,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 202.0) internal successors, (2222), 11 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:59,589 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 202.0) internal successors, (2222), 11 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:59,589 INFO L175 Difference]: Start difference. First operand has 54 places, 24 transitions, 163 flow. Second operand 10 states and 420 transitions. [2023-08-26 14:08:59,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 31 transitions, 239 flow [2023-08-26 14:08:59,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 31 transitions, 218 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-08-26 14:08:59,591 INFO L231 Difference]: Finished difference. Result has 54 places, 19 transitions, 128 flow [2023-08-26 14:08:59,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=128, PETRI_PLACES=54, PETRI_TRANSITIONS=19} [2023-08-26 14:08:59,591 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-08-26 14:08:59,591 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 19 transitions, 128 flow [2023-08-26 14:08:59,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 40.58064516129032) internal successors, (1258), 31 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 14:08:59,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:59,592 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:59,597 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 14:08:59,796 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 14:08:59,797 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-26 14:08:59,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:59,797 INFO L85 PathProgramCache]: Analyzing trace with hash -619219985, now seen corresponding path program 3 times [2023-08-26 14:08:59,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:59,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88547804] [2023-08-26 14:08:59,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:59,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:09:00,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:00,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88547804] [2023-08-26 14:09:00,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88547804] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:09:00,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997989267] [2023-08-26 14:09:00,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 14:09:00,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:09:00,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:09:00,418 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 14:09:00,419 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 14:09:00,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-26 14:09:00,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:09:00,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-26 14:09:00,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:09:00,553 INFO L322 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-08-26 14:09:00,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-08-26 14:09:00,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 14:09:00,627 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-26 14:09:00,627 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 14:09:00,655 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 14:09:00,716 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 14:09:00,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 14:09:00,780 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 14:09:00,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 14:09:00,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 14:09:00,882 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 14:09:00,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 14:09:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:09:00,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:09:01,009 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| v_ArrVal_421) |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_src#1.base|) (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1| 2 |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_src#1.offset|)) 0)) is different from false [2023-08-26 14:09:01,013 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| v_ArrVal_421) |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_src#1.base|) (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1| 3 |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_src#1.offset|)) 0)) is different from false [2023-08-26 14:09:01,018 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| v_ArrVal_421) |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_src#1.base|) (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_src#1.offset| 4)) 0)) is different from false [2023-08-26 14:09:01,024 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| v_ArrVal_421) |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_src#1.base|) (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1| 5 |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_src#1.offset|)) 0)) is different from false [2023-08-26 14:09:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 22 not checked. [2023-08-26 14:09:09,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997989267] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:09:09,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:09:09,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2023-08-26 14:09:09,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046877452] [2023-08-26 14:09:09,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:09:09,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-26 14:09:09,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:09,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-26 14:09:09,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=874, Unknown=45, NotChecked=252, Total=1260 [2023-08-26 14:09:09,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 202 [2023-08-26 14:09:09,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 19 transitions, 128 flow. Second operand has 36 states, 36 states have (on average 40.361111111111114) internal successors, (1453), 36 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:09,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:09,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 202 [2023-08-26 14:09:09,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:10,329 INFO L124 PetriNetUnfolderBase]: 9/36 cut-off events. [2023-08-26 14:09:10,329 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-08-26 14:09:10,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 36 events. 9/36 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 1 based on Foata normal form. 2/38 useless extension candidates. Maximal degree in co-relation 144. Up to 10 conditions per place. [2023-08-26 14:09:10,330 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-08-26 14:09:10,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 26 transitions, 181 flow [2023-08-26 14:09:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 14:09:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 14:09:10,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 534 transitions. [2023-08-26 14:09:10,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20335110434120335 [2023-08-26 14:09:10,332 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 534 transitions. [2023-08-26 14:09:10,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 534 transitions. [2023-08-26 14:09:10,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:10,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 534 transitions. [2023-08-26 14:09:10,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 41.07692307692308) internal successors, (534), 13 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:10,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 202.0) internal successors, (2828), 14 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:10,339 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 202.0) internal successors, (2828), 14 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:10,339 INFO L175 Difference]: Start difference. First operand has 54 places, 19 transitions, 128 flow. Second operand 13 states and 534 transitions. [2023-08-26 14:09:10,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 26 transitions, 181 flow [2023-08-26 14:09:10,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 26 transitions, 117 flow, removed 6 selfloop flow, removed 22 redundant places. [2023-08-26 14:09:10,340 INFO L231 Difference]: Finished difference. Result has 41 places, 0 transitions, 0 flow [2023-08-26 14:09:10,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=0, PETRI_PLACES=41, PETRI_TRANSITIONS=0} [2023-08-26 14:09:10,340 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 6 predicate places. [2023-08-26 14:09:10,341 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 0 transitions, 0 flow [2023-08-26 14:09:10,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 40.361111111111114) internal successors, (1453), 36 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:10,344 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (24 of 25 remaining) [2023-08-26 14:09:10,344 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2023-08-26 14:09:10,344 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2023-08-26 14:09:10,344 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2023-08-26 14:09:10,344 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2023-08-26 14:09:10,344 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2023-08-26 14:09:10,344 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2023-08-26 14:09:10,344 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 25 remaining) [2023-08-26 14:09:10,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 25 remaining) [2023-08-26 14:09:10,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2023-08-26 14:09:10,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2023-08-26 14:09:10,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2023-08-26 14:09:10,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2023-08-26 14:09:10,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2023-08-26 14:09:10,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2023-08-26 14:09:10,345 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2023-08-26 14:09:10,346 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONASSERT (8 of 25 remaining) [2023-08-26 14:09:10,346 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 25 remaining) [2023-08-26 14:09:10,346 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 25 remaining) [2023-08-26 14:09:10,346 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2023-08-26 14:09:10,346 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2023-08-26 14:09:10,346 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2023-08-26 14:09:10,346 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2023-08-26 14:09:10,346 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2023-08-26 14:09:10,346 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2023-08-26 14:09:10,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-26 14:09:10,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:09:10,552 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:09:10,558 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 14:09:10,558 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 14:09:10,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:09:10 BasicIcfg [2023-08-26 14:09:10,561 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 14:09:10,561 INFO L158 Benchmark]: Toolchain (without parser) took 65839.84ms. Allocated memory was 388.0MB in the beginning and 690.0MB in the end (delta: 302.0MB). Free memory was 361.6MB in the beginning and 283.1MB in the end (delta: 78.5MB). Peak memory consumption was 383.5MB. Max. memory is 16.0GB. [2023-08-26 14:09:10,561 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 388.0MB. Free memory was 364.1MB in the beginning and 363.9MB in the end (delta: 169.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 14:09:10,561 INFO L158 Benchmark]: CACSL2BoogieTranslator took 473.35ms. Allocated memory is still 388.0MB. Free memory was 361.6MB in the beginning and 328.9MB in the end (delta: 32.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. [2023-08-26 14:09:10,562 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.61ms. Allocated memory is still 388.0MB. Free memory was 328.9MB in the beginning and 326.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 14:09:10,562 INFO L158 Benchmark]: Boogie Preprocessor took 31.81ms. Allocated memory is still 388.0MB. Free memory was 326.8MB in the beginning and 325.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 14:09:10,562 INFO L158 Benchmark]: RCFGBuilder took 406.15ms. Allocated memory is still 388.0MB. Free memory was 324.7MB in the beginning and 308.5MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 14:09:10,562 INFO L158 Benchmark]: TraceAbstraction took 64872.61ms. Allocated memory was 388.0MB in the beginning and 690.0MB in the end (delta: 302.0MB). Free memory was 307.9MB in the beginning and 283.1MB in the end (delta: 24.8MB). Peak memory consumption was 329.0MB. Max. memory is 16.0GB. [2023-08-26 14:09:10,563 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 388.0MB. Free memory was 364.1MB in the beginning and 363.9MB in the end (delta: 169.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 473.35ms. Allocated memory is still 388.0MB. Free memory was 361.6MB in the beginning and 328.9MB in the end (delta: 32.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 51.61ms. Allocated memory is still 388.0MB. Free memory was 328.9MB in the beginning and 326.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.81ms. Allocated memory is still 388.0MB. Free memory was 326.8MB in the beginning and 325.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 406.15ms. Allocated memory is still 388.0MB. Free memory was 324.7MB in the beginning and 308.5MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 64872.61ms. Allocated memory was 388.0MB in the beginning and 690.0MB in the end (delta: 302.0MB). Free memory was 307.9MB in the beginning and 283.1MB in the end (delta: 24.8MB). Peak memory consumption was 329.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 274]: Unsoundness Warning unspecified type, defaulting to int C: short [274] - GenericResultAtLocation [Line: 274]: Unsoundness Warning unspecified type, defaulting to int C: short [274] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 95 PlacesBefore, 35 PlacesAfterwards, 91 TransitionsBefore, 30 TransitionsAfterwards, 340 CoEnabledTransitionPairs, 6 FixpointIterations, 48 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 1 ChoiceCompositions, 96 TotalNumberOfCompositions, 461 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 371, independent: 346, independent conditional: 0, independent unconditional: 346, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 187, independent: 176, independent conditional: 0, independent unconditional: 176, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 371, independent: 170, independent conditional: 0, independent unconditional: 170, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 187, unknown conditional: 0, unknown unconditional: 187] , Statistics on independence cache: Total cache size (in pairs): 11, Positive cache size: 9, Positive conditional cache size: 0, Positive unconditional cache size: 9, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 137 locations, 25 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 64.7s, OverallIterations: 19, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 15 mSolverCounterUnknown, 820 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 820 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 100 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 202 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1595 IncrementalHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 202 mSolverCounterUnsat, 0 mSDtfsCounter, 1595 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 308 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 212 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 53.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163occurred in iteration=17, InterpolantAutomatonStates: 103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 55.5s InterpolantComputationTime, 268 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 316 ConstructedInterpolants, 45 QuantifiedInterpolants, 5208 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1509 ConjunctsInSsa, 247 ConjunctsInUnsatCore, 32 InterpolantComputations, 13 PerfectInterpolantSequences, 45/212 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 14:09:10,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...