/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/09-regions_02-list_nr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:23:55,796 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:23:55,849 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 12:23:55,852 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:23:55,852 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:23:55,867 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:23:55,867 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:23:55,868 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:23:55,868 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:23:55,871 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:23:55,871 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:23:55,871 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:23:55,871 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:23:55,872 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:23:55,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:23:55,872 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:23:55,872 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:23:55,873 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:23:55,873 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:23:55,873 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:23:55,873 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:23:55,873 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:23:55,873 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:23:55,874 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:23:55,874 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:23:55,874 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:23:55,874 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:23:55,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:23:55,875 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:23:55,875 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:23:55,875 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:23:55,875 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:23:55,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:23:55,876 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:23:55,876 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:23:55,876 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:23:56,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:23:56,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:23:56,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:23:56,135 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:23:56,135 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:23:56,136 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_02-list_nr.i [2023-08-26 12:23:56,998 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:23:57,224 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:23:57,224 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_02-list_nr.i [2023-08-26 12:23:57,253 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02d69b05f/588dfd81caf84db682066e728a3900e6/FLAG936842f02 [2023-08-26 12:23:57,265 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02d69b05f/588dfd81caf84db682066e728a3900e6 [2023-08-26 12:23:57,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:23:57,271 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:23:57,273 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:23:57,273 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:23:57,276 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:23:57,276 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:23:57" (1/1) ... [2023-08-26 12:23:57,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56922dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:57, skipping insertion in model container [2023-08-26 12:23:57,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:23:57" (1/1) ... [2023-08-26 12:23:57,315 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:23:57,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:23:57,687 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:23:57,698 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:23:57,699 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:23:57,714 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [1044] [2023-08-26 12:23:57,721 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:23:57,783 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:23:57,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:57 WrapperNode [2023-08-26 12:23:57,785 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:23:57,786 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:23:57,786 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:23:57,786 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:23:57,790 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:57" (1/1) ... [2023-08-26 12:23:57,815 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:57" (1/1) ... [2023-08-26 12:23:57,841 INFO L138 Inliner]: procedures = 368, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 80 [2023-08-26 12:23:57,841 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:23:57,842 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:23:57,842 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:23:57,842 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:23:57,847 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:57" (1/1) ... [2023-08-26 12:23:57,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:57" (1/1) ... [2023-08-26 12:23:57,860 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:57" (1/1) ... [2023-08-26 12:23:57,860 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:57" (1/1) ... [2023-08-26 12:23:57,865 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:57" (1/1) ... [2023-08-26 12:23:57,865 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:57" (1/1) ... [2023-08-26 12:23:57,867 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:57" (1/1) ... [2023-08-26 12:23:57,867 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:57" (1/1) ... [2023-08-26 12:23:57,879 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:23:57,880 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:23:57,880 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:23:57,880 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:23:57,881 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:57" (1/1) ... [2023-08-26 12:23:57,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:23:57,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:23:57,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 12:23:57,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 12:23:57,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:23:57,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-26 12:23:57,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:23:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:23:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:23:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:23:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-26 12:23:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:23:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-26 12:23:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 12:23:57,926 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 12:23:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:23:57,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:23:57,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:23:57,928 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 12:23:58,045 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:23:58,047 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:23:58,295 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:23:58,300 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:23:58,300 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 12:23:58,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:23:58 BoogieIcfgContainer [2023-08-26 12:23:58,302 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:23:58,303 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:23:58,303 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:23:58,305 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:23:58,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:23:57" (1/3) ... [2023-08-26 12:23:58,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24cbfc39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:23:58, skipping insertion in model container [2023-08-26 12:23:58,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:57" (2/3) ... [2023-08-26 12:23:58,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24cbfc39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:23:58, skipping insertion in model container [2023-08-26 12:23:58,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:23:58" (3/3) ... [2023-08-26 12:23:58,306 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_02-list_nr.i [2023-08-26 12:23:58,317 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:23:58,317 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-26 12:23:58,317 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:23:58,379 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:23:58,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 113 transitions, 231 flow [2023-08-26 12:23:58,457 INFO L124 PetriNetUnfolderBase]: 0/112 cut-off events. [2023-08-26 12:23:58,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:23:58,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 112 events. 0/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 131 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-08-26 12:23:58,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 113 transitions, 231 flow [2023-08-26 12:23:58,463 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 112 transitions, 227 flow [2023-08-26 12:23:58,465 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:23:58,473 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 112 transitions, 227 flow [2023-08-26 12:23:58,476 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 112 transitions, 227 flow [2023-08-26 12:23:58,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 112 transitions, 227 flow [2023-08-26 12:23:58,508 INFO L124 PetriNetUnfolderBase]: 0/112 cut-off events. [2023-08-26 12:23:58,508 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:23:58,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 112 events. 0/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 131 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-08-26 12:23:58,510 INFO L119 LiptonReduction]: Number of co-enabled transitions 1280 [2023-08-26 12:24:21,851 WARN L234 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 226 DAG size of output: 217 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-26 12:24:24,259 INFO L134 LiptonReduction]: Checked pairs total: 4946 [2023-08-26 12:24:24,260 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-26 12:24:24,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:24:24,271 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;@5420f923, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:24:24,271 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-08-26 12:24:24,272 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:24:24,272 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 12:24:24,272 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:24:24,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:24,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:24:24,273 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:24,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash 404, now seen corresponding path program 1 times [2023-08-26 12:24:24,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:24,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846403151] [2023-08-26 12:24:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:24,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:24,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:24,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846403151] [2023-08-26 12:24:24,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846403151] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:24,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:24,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:24:24,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780653767] [2023-08-26 12:24:24,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:24,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:24:24,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:24,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:24:24,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:24:24,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 234 [2023-08-26 12:24:24,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 85 flow. Second operand has 2 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 12:24:24,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:24,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 234 [2023-08-26 12:24:24,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:24,477 INFO L124 PetriNetUnfolderBase]: 84/217 cut-off events. [2023-08-26 12:24:24,478 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:24:24,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 217 events. 84/217 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 923 event pairs, 84 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 402. Up to 190 conditions per place. [2023-08-26 12:24:24,482 INFO L140 encePairwiseOnDemand]: 220/234 looper letters, 21 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-08-26 12:24:24,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 99 flow [2023-08-26 12:24:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:24:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:24:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 259 transitions. [2023-08-26 12:24:24,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534188034188035 [2023-08-26 12:24:24,497 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 259 transitions. [2023-08-26 12:24:24,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 259 transitions. [2023-08-26 12:24:24,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:24,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 259 transitions. [2023-08-26 12:24:24,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.5) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:24,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:24,506 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:24,507 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 85 flow. Second operand 2 states and 259 transitions. [2023-08-26 12:24:24,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 99 flow [2023-08-26 12:24:24,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:24:24,510 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 56 flow [2023-08-26 12:24:24,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-26 12:24:24,516 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -14 predicate places. [2023-08-26 12:24:24,516 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 56 flow [2023-08-26 12:24:24,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 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 12:24:24,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:24,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:24:24,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:24:24,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:24,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:24,523 INFO L85 PathProgramCache]: Analyzing trace with hash 12416812, now seen corresponding path program 1 times [2023-08-26 12:24:24,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:24,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817408798] [2023-08-26 12:24:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:24,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:24,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:24,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817408798] [2023-08-26 12:24:24,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817408798] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:24,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:24,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:24:24,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158107139] [2023-08-26 12:24:24,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:24,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:24:24,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:24,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:24:24,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:24:24,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 234 [2023-08-26 12:24:24,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:24,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:24,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 234 [2023-08-26 12:24:24,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:24,772 INFO L124 PetriNetUnfolderBase]: 111/255 cut-off events. [2023-08-26 12:24:24,772 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:24:24,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 255 events. 111/255 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1048 event pairs, 98 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 512. Up to 227 conditions per place. [2023-08-26 12:24:24,775 INFO L140 encePairwiseOnDemand]: 226/234 looper letters, 33 selfloop transitions, 5 changer transitions 2/40 dead transitions. [2023-08-26 12:24:24,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 162 flow [2023-08-26 12:24:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:24:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:24:24,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2023-08-26 12:24:24,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36894586894586895 [2023-08-26 12:24:24,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2023-08-26 12:24:24,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2023-08-26 12:24:24,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:24,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2023-08-26 12:24:24,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:24,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:24,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:24,780 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 56 flow. Second operand 3 states and 259 transitions. [2023-08-26 12:24:24,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 162 flow [2023-08-26 12:24:24,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:24:24,781 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 90 flow [2023-08-26 12:24:24,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-08-26 12:24:24,783 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -11 predicate places. [2023-08-26 12:24:24,784 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 90 flow [2023-08-26 12:24:24,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:24,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:24,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:24:24,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:24:24,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:24,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:24,791 INFO L85 PathProgramCache]: Analyzing trace with hash 12416813, now seen corresponding path program 1 times [2023-08-26 12:24:24,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:24,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222816888] [2023-08-26 12:24:24,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:24,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:24,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:24,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222816888] [2023-08-26 12:24:24,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222816888] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:24,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:24,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:24:24,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885410924] [2023-08-26 12:24:24,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:24,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:24:24,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:24,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:24:24,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:24:24,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 234 [2023-08-26 12:24:24,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:24,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:24,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 234 [2023-08-26 12:24:24,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:25,004 INFO L124 PetriNetUnfolderBase]: 76/191 cut-off events. [2023-08-26 12:24:25,004 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 12:24:25,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 191 events. 76/191 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 754 event pairs, 74 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 430. Up to 180 conditions per place. [2023-08-26 12:24:25,006 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 24 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-26 12:24:25,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 27 transitions, 136 flow [2023-08-26 12:24:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:24:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:24:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2023-08-26 12:24:25,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3504273504273504 [2023-08-26 12:24:25,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions. [2023-08-26 12:24:25,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions. [2023-08-26 12:24:25,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:25,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions. [2023-08-26 12:24:25,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,009 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 90 flow. Second operand 3 states and 246 transitions. [2023-08-26 12:24:25,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 27 transitions, 136 flow [2023-08-26 12:24:25,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:24:25,011 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 78 flow [2023-08-26 12:24:25,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-26 12:24:25,012 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -13 predicate places. [2023-08-26 12:24:25,012 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 78 flow [2023-08-26 12:24:25,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:25,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:24:25,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:24:25,013 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:25,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:25,013 INFO L85 PathProgramCache]: Analyzing trace with hash 12417673, now seen corresponding path program 1 times [2023-08-26 12:24:25,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117857327] [2023-08-26 12:24:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:25,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:25,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:25,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117857327] [2023-08-26 12:24:25,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117857327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:25,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:25,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:24:25,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189797920] [2023-08-26 12:24:25,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:25,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:24:25,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:25,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:24:25,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:24:25,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 234 [2023-08-26 12:24:25,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:25,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 234 [2023-08-26 12:24:25,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:25,194 INFO L124 PetriNetUnfolderBase]: 76/188 cut-off events. [2023-08-26 12:24:25,194 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 12:24:25,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 188 events. 76/188 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 763 event pairs, 2 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 411. Up to 170 conditions per place. [2023-08-26 12:24:25,197 INFO L140 encePairwiseOnDemand]: 232/234 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-26 12:24:25,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 154 flow [2023-08-26 12:24:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:24:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:24:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2023-08-26 12:24:25,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2023-08-26 12:24:25,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2023-08-26 12:24:25,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2023-08-26 12:24:25,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:25,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2023-08-26 12:24:25,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,200 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,200 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 78 flow. Second operand 3 states and 260 transitions. [2023-08-26 12:24:25,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 154 flow [2023-08-26 12:24:25,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:24:25,202 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 77 flow [2023-08-26 12:24:25,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-26 12:24:25,203 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -13 predicate places. [2023-08-26 12:24:25,203 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 77 flow [2023-08-26 12:24:25,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:25,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:24:25,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:24:25,204 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:25,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash 12417653, now seen corresponding path program 1 times [2023-08-26 12:24:25,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:25,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008780713] [2023-08-26 12:24:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:25,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:25,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:25,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008780713] [2023-08-26 12:24:25,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008780713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:25,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:25,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:24:25,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082706820] [2023-08-26 12:24:25,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:25,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:24:25,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:25,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:24:25,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:24:25,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 234 [2023-08-26 12:24:25,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:25,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 234 [2023-08-26 12:24:25,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:25,313 INFO L124 PetriNetUnfolderBase]: 68/178 cut-off events. [2023-08-26 12:24:25,313 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-26 12:24:25,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 178 events. 68/178 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 717 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 411. Up to 143 conditions per place. [2023-08-26 12:24:25,314 INFO L140 encePairwiseOnDemand]: 228/234 looper letters, 37 selfloop transitions, 4 changer transitions 2/43 dead transitions. [2023-08-26 12:24:25,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 207 flow [2023-08-26 12:24:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:24:25,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:24:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-08-26 12:24:25,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3803418803418803 [2023-08-26 12:24:25,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-08-26 12:24:25,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-08-26 12:24:25,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:25,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-08-26 12:24:25,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,317 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 77 flow. Second operand 3 states and 267 transitions. [2023-08-26 12:24:25,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 207 flow [2023-08-26 12:24:25,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:24:25,318 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 110 flow [2023-08-26 12:24:25,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-26 12:24:25,319 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -10 predicate places. [2023-08-26 12:24:25,319 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 110 flow [2023-08-26 12:24:25,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:25,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:24:25,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:24:25,319 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:25,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:25,320 INFO L85 PathProgramCache]: Analyzing trace with hash 384926060, now seen corresponding path program 1 times [2023-08-26 12:24:25,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:25,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783252982] [2023-08-26 12:24:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:25,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:25,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:25,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783252982] [2023-08-26 12:24:25,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783252982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:25,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:25,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:24:25,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207253332] [2023-08-26 12:24:25,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:25,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:24:25,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:25,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:24:25,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:24:25,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 234 [2023-08-26 12:24:25,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 110 flow. Second operand has 4 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 12:24:25,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:25,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 234 [2023-08-26 12:24:25,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:25,630 INFO L124 PetriNetUnfolderBase]: 82/208 cut-off events. [2023-08-26 12:24:25,630 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-26 12:24:25,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 208 events. 82/208 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 899 event pairs, 5 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 534. Up to 99 conditions per place. [2023-08-26 12:24:25,631 INFO L140 encePairwiseOnDemand]: 228/234 looper letters, 40 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2023-08-26 12:24:25,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 47 transitions, 261 flow [2023-08-26 12:24:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:24:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:24:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 311 transitions. [2023-08-26 12:24:25,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33226495726495725 [2023-08-26 12:24:25,632 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 311 transitions. [2023-08-26 12:24:25,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 311 transitions. [2023-08-26 12:24:25,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:25,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 311 transitions. [2023-08-26 12:24:25,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,634 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,634 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 110 flow. Second operand 4 states and 311 transitions. [2023-08-26 12:24:25,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 47 transitions, 261 flow [2023-08-26 12:24:25,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:24:25,636 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 154 flow [2023-08-26 12:24:25,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-26 12:24:25,637 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -6 predicate places. [2023-08-26 12:24:25,637 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 154 flow [2023-08-26 12:24:25,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 12:24:25,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:25,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:24:25,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:24:25,637 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:25,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:25,638 INFO L85 PathProgramCache]: Analyzing trace with hash 384926061, now seen corresponding path program 1 times [2023-08-26 12:24:25,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:25,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489118153] [2023-08-26 12:24:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:25,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:25,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:25,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489118153] [2023-08-26 12:24:25,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489118153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:25,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:25,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:24:25,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247216432] [2023-08-26 12:24:25,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:25,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:24:25,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:25,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:24:25,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:24:25,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 234 [2023-08-26 12:24:25,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 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 12:24:25,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:25,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 234 [2023-08-26 12:24:25,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:25,980 INFO L124 PetriNetUnfolderBase]: 75/228 cut-off events. [2023-08-26 12:24:25,980 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2023-08-26 12:24:25,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 228 events. 75/228 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1153 event pairs, 7 based on Foata normal form. 10/215 useless extension candidates. Maximal degree in co-relation 681. Up to 104 conditions per place. [2023-08-26 12:24:25,981 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 44 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2023-08-26 12:24:25,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 318 flow [2023-08-26 12:24:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:24:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:24:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2023-08-26 12:24:25,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33760683760683763 [2023-08-26 12:24:25,982 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 316 transitions. [2023-08-26 12:24:25,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 316 transitions. [2023-08-26 12:24:25,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:25,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 316 transitions. [2023-08-26 12:24:25,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,984 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:25,984 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 154 flow. Second operand 4 states and 316 transitions. [2023-08-26 12:24:25,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 318 flow [2023-08-26 12:24:25,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:24:25,986 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 176 flow [2023-08-26 12:24:25,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-08-26 12:24:25,986 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -1 predicate places. [2023-08-26 12:24:25,986 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 176 flow [2023-08-26 12:24:25,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 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 12:24:25,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:25,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:24:25,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:24:25,987 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:25,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:25,987 INFO L85 PathProgramCache]: Analyzing trace with hash 547880006, now seen corresponding path program 1 times [2023-08-26 12:24:25,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:25,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919853666] [2023-08-26 12:24:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:25,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:26,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:26,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919853666] [2023-08-26 12:24:26,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919853666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:26,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:26,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:24:26,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213531648] [2023-08-26 12:24:26,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:26,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:24:26,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:26,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:24:26,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:24:26,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 234 [2023-08-26 12:24:26,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 6 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:26,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:26,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 234 [2023-08-26 12:24:26,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:26,443 INFO L124 PetriNetUnfolderBase]: 86/252 cut-off events. [2023-08-26 12:24:26,444 INFO L125 PetriNetUnfolderBase]: For 315/315 co-relation queries the response was YES. [2023-08-26 12:24:26,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 252 events. 86/252 cut-off events. For 315/315 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1262 event pairs, 12 based on Foata normal form. 9/220 useless extension candidates. Maximal degree in co-relation 814. Up to 98 conditions per place. [2023-08-26 12:24:26,445 INFO L140 encePairwiseOnDemand]: 226/234 looper letters, 44 selfloop transitions, 10 changer transitions 0/54 dead transitions. [2023-08-26 12:24:26,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 372 flow [2023-08-26 12:24:26,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:24:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:24:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 363 transitions. [2023-08-26 12:24:26,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31025641025641026 [2023-08-26 12:24:26,446 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 363 transitions. [2023-08-26 12:24:26,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 363 transitions. [2023-08-26 12:24:26,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:26,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 363 transitions. [2023-08-26 12:24:26,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.6) internal successors, (363), 5 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 12:24:26,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:26,448 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:26,448 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 176 flow. Second operand 5 states and 363 transitions. [2023-08-26 12:24:26,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 372 flow [2023-08-26 12:24:26,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 365 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:24:26,452 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 261 flow [2023-08-26 12:24:26,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2023-08-26 12:24:26,453 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2023-08-26 12:24:26,453 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 261 flow [2023-08-26 12:24:26,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 6 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:26,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:26,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:24:26,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:24:26,454 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:26,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:26,454 INFO L85 PathProgramCache]: Analyzing trace with hash 547880007, now seen corresponding path program 1 times [2023-08-26 12:24:26,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:26,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006471605] [2023-08-26 12:24:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:26,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:26,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:26,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006471605] [2023-08-26 12:24:26,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006471605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:26,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:26,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:24:26,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934405594] [2023-08-26 12:24:26,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:26,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:24:26,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:26,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:24:26,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:24:26,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 234 [2023-08-26 12:24:26,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 261 flow. Second operand has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:26,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:26,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 234 [2023-08-26 12:24:26,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:26,939 INFO L124 PetriNetUnfolderBase]: 83/260 cut-off events. [2023-08-26 12:24:26,940 INFO L125 PetriNetUnfolderBase]: For 621/621 co-relation queries the response was YES. [2023-08-26 12:24:26,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 260 events. 83/260 cut-off events. For 621/621 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1382 event pairs, 15 based on Foata normal form. 9/225 useless extension candidates. Maximal degree in co-relation 971. Up to 112 conditions per place. [2023-08-26 12:24:26,941 INFO L140 encePairwiseOnDemand]: 225/234 looper letters, 46 selfloop transitions, 14 changer transitions 0/60 dead transitions. [2023-08-26 12:24:26,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 463 flow [2023-08-26 12:24:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:24:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:24:26,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 454 transitions. [2023-08-26 12:24:26,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2771672771672772 [2023-08-26 12:24:26,942 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 454 transitions. [2023-08-26 12:24:26,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 454 transitions. [2023-08-26 12:24:26,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:26,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 454 transitions. [2023-08-26 12:24:26,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:26,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 234.0) internal successors, (1872), 8 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:26,945 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 234.0) internal successors, (1872), 8 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:26,945 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 261 flow. Second operand 7 states and 454 transitions. [2023-08-26 12:24:26,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 463 flow [2023-08-26 12:24:26,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 461 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 12:24:26,948 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 334 flow [2023-08-26 12:24:26,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=334, PETRI_PLACES=59, PETRI_TRANSITIONS=42} [2023-08-26 12:24:26,948 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2023-08-26 12:24:26,948 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 334 flow [2023-08-26 12:24:26,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:26,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:26,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:24:26,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:24:26,949 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:26,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:26,949 INFO L85 PathProgramCache]: Analyzing trace with hash 427453751, now seen corresponding path program 1 times [2023-08-26 12:24:26,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:26,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427905325] [2023-08-26 12:24:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:26,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:27,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:27,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427905325] [2023-08-26 12:24:27,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427905325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:27,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:27,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:24:27,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899249458] [2023-08-26 12:24:27,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:27,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:24:27,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:24:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:24:27,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 234 [2023-08-26 12:24:27,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 334 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:27,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 234 [2023-08-26 12:24:27,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:27,073 INFO L124 PetriNetUnfolderBase]: 75/232 cut-off events. [2023-08-26 12:24:27,073 INFO L125 PetriNetUnfolderBase]: For 809/809 co-relation queries the response was YES. [2023-08-26 12:24:27,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 232 events. 75/232 cut-off events. For 809/809 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1148 event pairs, 43 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 914. Up to 218 conditions per place. [2023-08-26 12:24:27,074 INFO L140 encePairwiseOnDemand]: 232/234 looper letters, 38 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-26 12:24:27,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 42 transitions, 388 flow [2023-08-26 12:24:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:24:27,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:24:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2023-08-26 12:24:27,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2023-08-26 12:24:27,075 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2023-08-26 12:24:27,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2023-08-26 12:24:27,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:27,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2023-08-26 12:24:27,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,077 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 334 flow. Second operand 3 states and 260 transitions. [2023-08-26 12:24:27,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 42 transitions, 388 flow [2023-08-26 12:24:27,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 42 transitions, 381 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 12:24:27,080 INFO L231 Difference]: Finished difference. Result has 58 places, 38 transitions, 293 flow [2023-08-26 12:24:27,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=58, PETRI_TRANSITIONS=38} [2023-08-26 12:24:27,081 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2023-08-26 12:24:27,082 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 38 transitions, 293 flow [2023-08-26 12:24:27,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:27,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:24:27,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:24:27,082 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:27,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:27,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1454913908, now seen corresponding path program 1 times [2023-08-26 12:24:27,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:27,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884725289] [2023-08-26 12:24:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:27,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:27,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:27,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884725289] [2023-08-26 12:24:27,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884725289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:27,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:27,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:24:27,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995680274] [2023-08-26 12:24:27,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:27,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:24:27,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:27,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:24:27,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:24:27,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 234 [2023-08-26 12:24:27,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 38 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:27,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 234 [2023-08-26 12:24:27,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:27,237 INFO L124 PetriNetUnfolderBase]: 75/229 cut-off events. [2023-08-26 12:24:27,237 INFO L125 PetriNetUnfolderBase]: For 803/803 co-relation queries the response was YES. [2023-08-26 12:24:27,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 930 conditions, 229 events. 75/229 cut-off events. For 803/803 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1126 event pairs, 32 based on Foata normal form. 1/210 useless extension candidates. Maximal degree in co-relation 912. Up to 149 conditions per place. [2023-08-26 12:24:27,238 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 36 selfloop transitions, 7 changer transitions 2/45 dead transitions. [2023-08-26 12:24:27,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 45 transitions, 399 flow [2023-08-26 12:24:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:24:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:24:27,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 391 transitions. [2023-08-26 12:24:27,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33418803418803417 [2023-08-26 12:24:27,240 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 391 transitions. [2023-08-26 12:24:27,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 391 transitions. [2023-08-26 12:24:27,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:27,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 391 transitions. [2023-08-26 12:24:27,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,243 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,243 INFO L175 Difference]: Start difference. First operand has 58 places, 38 transitions, 293 flow. Second operand 5 states and 391 transitions. [2023-08-26 12:24:27,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 45 transitions, 399 flow [2023-08-26 12:24:27,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 45 transitions, 397 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:24:27,246 INFO L231 Difference]: Finished difference. Result has 59 places, 36 transitions, 297 flow [2023-08-26 12:24:27,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=59, PETRI_TRANSITIONS=36} [2023-08-26 12:24:27,246 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2023-08-26 12:24:27,246 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 36 transitions, 297 flow [2023-08-26 12:24:27,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:27,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:24:27,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 12:24:27,247 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:27,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:27,247 INFO L85 PathProgramCache]: Analyzing trace with hash 366164618, now seen corresponding path program 1 times [2023-08-26 12:24:27,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:27,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550344014] [2023-08-26 12:24:27,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:27,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:27,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:27,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550344014] [2023-08-26 12:24:27,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550344014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:27,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:27,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:24:27,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979984309] [2023-08-26 12:24:27,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:27,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:24:27,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:27,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:24:27,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:24:27,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 234 [2023-08-26 12:24:27,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 36 transitions, 297 flow. Second operand has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:27,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 234 [2023-08-26 12:24:27,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:27,389 INFO L124 PetriNetUnfolderBase]: 59/204 cut-off events. [2023-08-26 12:24:27,389 INFO L125 PetriNetUnfolderBase]: For 839/839 co-relation queries the response was YES. [2023-08-26 12:24:27,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 204 events. 59/204 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1005 event pairs, 25 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 848. Up to 159 conditions per place. [2023-08-26 12:24:27,390 INFO L140 encePairwiseOnDemand]: 228/234 looper letters, 33 selfloop transitions, 7 changer transitions 6/46 dead transitions. [2023-08-26 12:24:27,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 46 transitions, 429 flow [2023-08-26 12:24:27,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:24:27,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:24:27,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 322 transitions. [2023-08-26 12:24:27,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.344017094017094 [2023-08-26 12:24:27,391 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 322 transitions. [2023-08-26 12:24:27,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 322 transitions. [2023-08-26 12:24:27,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:27,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 322 transitions. [2023-08-26 12:24:27,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,394 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,394 INFO L175 Difference]: Start difference. First operand has 59 places, 36 transitions, 297 flow. Second operand 4 states and 322 transitions. [2023-08-26 12:24:27,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 46 transitions, 429 flow [2023-08-26 12:24:27,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 46 transitions, 417 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 12:24:27,397 INFO L231 Difference]: Finished difference. Result has 61 places, 34 transitions, 301 flow [2023-08-26 12:24:27,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=61, PETRI_TRANSITIONS=34} [2023-08-26 12:24:27,397 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2023-08-26 12:24:27,397 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 34 transitions, 301 flow [2023-08-26 12:24:27,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:27,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:24:27,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:24:27,398 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:27,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:27,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1150201333, now seen corresponding path program 1 times [2023-08-26 12:24:27,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:27,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042047129] [2023-08-26 12:24:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:27,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:27,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:27,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042047129] [2023-08-26 12:24:27,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042047129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:27,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:27,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:24:27,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006949259] [2023-08-26 12:24:27,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:27,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:24:27,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:27,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:24:27,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:24:27,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-26 12:24:27,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 34 transitions, 301 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:27,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-26 12:24:27,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:27,506 INFO L124 PetriNetUnfolderBase]: 20/117 cut-off events. [2023-08-26 12:24:27,506 INFO L125 PetriNetUnfolderBase]: For 829/829 co-relation queries the response was YES. [2023-08-26 12:24:27,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 117 events. 20/117 cut-off events. For 829/829 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 522 event pairs, 4 based on Foata normal form. 8/125 useless extension candidates. Maximal degree in co-relation 587. Up to 64 conditions per place. [2023-08-26 12:24:27,507 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 30 selfloop transitions, 4 changer transitions 2/39 dead transitions. [2023-08-26 12:24:27,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 39 transitions, 444 flow [2023-08-26 12:24:27,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:24:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:24:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-08-26 12:24:27,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4686609686609687 [2023-08-26 12:24:27,508 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-08-26 12:24:27,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-08-26 12:24:27,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:27,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-08-26 12:24:27,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,509 INFO L175 Difference]: Start difference. First operand has 61 places, 34 transitions, 301 flow. Second operand 3 states and 329 transitions. [2023-08-26 12:24:27,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 39 transitions, 444 flow [2023-08-26 12:24:27,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 39 transitions, 407 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-26 12:24:27,512 INFO L231 Difference]: Finished difference. Result has 58 places, 33 transitions, 270 flow [2023-08-26 12:24:27,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=58, PETRI_TRANSITIONS=33} [2023-08-26 12:24:27,512 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2023-08-26 12:24:27,512 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 33 transitions, 270 flow [2023-08-26 12:24:27,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:27,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:24:27,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:24:27,512 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:27,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:27,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1494050400, now seen corresponding path program 1 times [2023-08-26 12:24:27,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:27,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232863995] [2023-08-26 12:24:27,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:27,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:27,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:27,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232863995] [2023-08-26 12:24:27,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232863995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:27,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:27,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:24:27,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134407637] [2023-08-26 12:24:27,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:27,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:24:27,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:27,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:24:27,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:24:27,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 234 [2023-08-26 12:24:27,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 33 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:27,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 234 [2023-08-26 12:24:27,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:27,668 INFO L124 PetriNetUnfolderBase]: 20/107 cut-off events. [2023-08-26 12:24:27,668 INFO L125 PetriNetUnfolderBase]: For 548/548 co-relation queries the response was YES. [2023-08-26 12:24:27,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 107 events. 20/107 cut-off events. For 548/548 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 422 event pairs, 13 based on Foata normal form. 7/114 useless extension candidates. Maximal degree in co-relation 554. Up to 59 conditions per place. [2023-08-26 12:24:27,669 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 23 selfloop transitions, 3 changer transitions 9/35 dead transitions. [2023-08-26 12:24:27,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 35 transitions, 348 flow [2023-08-26 12:24:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:24:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:24:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 304 transitions. [2023-08-26 12:24:27,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3247863247863248 [2023-08-26 12:24:27,670 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 304 transitions. [2023-08-26 12:24:27,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 304 transitions. [2023-08-26 12:24:27,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:27,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 304 transitions. [2023-08-26 12:24:27,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,672 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,672 INFO L175 Difference]: Start difference. First operand has 58 places, 33 transitions, 270 flow. Second operand 4 states and 304 transitions. [2023-08-26 12:24:27,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 35 transitions, 348 flow [2023-08-26 12:24:27,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 35 transitions, 324 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 12:24:27,674 INFO L231 Difference]: Finished difference. Result has 55 places, 25 transitions, 186 flow [2023-08-26 12:24:27,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=55, PETRI_TRANSITIONS=25} [2023-08-26 12:24:27,674 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2023-08-26 12:24:27,674 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 25 transitions, 186 flow [2023-08-26 12:24:27,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:27,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:24:27,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 12:24:27,675 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:27,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:27,675 INFO L85 PathProgramCache]: Analyzing trace with hash 768090146, now seen corresponding path program 1 times [2023-08-26 12:24:27,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:27,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795178856] [2023-08-26 12:24:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:27,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:27,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:27,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795178856] [2023-08-26 12:24:27,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795178856] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:27,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:27,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:24:27,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832252717] [2023-08-26 12:24:27,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:27,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:24:27,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:27,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:24:27,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:24:27,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 234 [2023-08-26 12:24:27,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 25 transitions, 186 flow. Second operand has 7 states, 7 states have (on average 58.857142857142854) internal successors, (412), 7 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:27,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:27,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 234 [2023-08-26 12:24:27,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:28,059 INFO L124 PetriNetUnfolderBase]: 19/86 cut-off events. [2023-08-26 12:24:28,059 INFO L125 PetriNetUnfolderBase]: For 575/575 co-relation queries the response was YES. [2023-08-26 12:24:28,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 86 events. 19/86 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 294 event pairs, 0 based on Foata normal form. 1/87 useless extension candidates. Maximal degree in co-relation 425. Up to 21 conditions per place. [2023-08-26 12:24:28,060 INFO L140 encePairwiseOnDemand]: 226/234 looper letters, 31 selfloop transitions, 16 changer transitions 4/51 dead transitions. [2023-08-26 12:24:28,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 51 transitions, 417 flow [2023-08-26 12:24:28,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 12:24:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 12:24:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 734 transitions. [2023-08-26 12:24:28,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2613960113960114 [2023-08-26 12:24:28,062 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 734 transitions. [2023-08-26 12:24:28,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 734 transitions. [2023-08-26 12:24:28,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:28,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 734 transitions. [2023-08-26 12:24:28,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.166666666666664) internal successors, (734), 12 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:28,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 234.0) internal successors, (3042), 13 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:28,066 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 234.0) internal successors, (3042), 13 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:28,066 INFO L175 Difference]: Start difference. First operand has 55 places, 25 transitions, 186 flow. Second operand 12 states and 734 transitions. [2023-08-26 12:24:28,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 51 transitions, 417 flow [2023-08-26 12:24:28,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 51 transitions, 390 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-26 12:24:28,068 INFO L231 Difference]: Finished difference. Result has 56 places, 30 transitions, 248 flow [2023-08-26 12:24:28,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=248, PETRI_PLACES=56, PETRI_TRANSITIONS=30} [2023-08-26 12:24:28,068 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2023-08-26 12:24:28,068 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 30 transitions, 248 flow [2023-08-26 12:24:28,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.857142857142854) internal successors, (412), 7 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:28,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:28,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:24:28,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 12:24:28,069 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:28,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:28,069 INFO L85 PathProgramCache]: Analyzing trace with hash 768090145, now seen corresponding path program 1 times [2023-08-26 12:24:28,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:28,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664857452] [2023-08-26 12:24:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:28,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:28,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664857452] [2023-08-26 12:24:28,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664857452] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:28,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:28,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:24:28,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167938266] [2023-08-26 12:24:28,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:28,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:24:28,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:28,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:24:28,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:24:28,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 234 [2023-08-26 12:24:28,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 30 transitions, 248 flow. Second operand has 7 states, 7 states have (on average 65.85714285714286) internal successors, (461), 7 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:28,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:28,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 234 [2023-08-26 12:24:28,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:28,334 INFO L124 PetriNetUnfolderBase]: 19/85 cut-off events. [2023-08-26 12:24:28,334 INFO L125 PetriNetUnfolderBase]: For 542/542 co-relation queries the response was YES. [2023-08-26 12:24:28,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 85 events. 19/85 cut-off events. For 542/542 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 283 event pairs, 2 based on Foata normal form. 1/86 useless extension candidates. Maximal degree in co-relation 427. Up to 28 conditions per place. [2023-08-26 12:24:28,335 INFO L140 encePairwiseOnDemand]: 224/234 looper letters, 19 selfloop transitions, 17 changer transitions 7/43 dead transitions. [2023-08-26 12:24:28,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 43 transitions, 403 flow [2023-08-26 12:24:28,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 12:24:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 12:24:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 741 transitions. [2023-08-26 12:24:28,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2878787878787879 [2023-08-26 12:24:28,337 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 741 transitions. [2023-08-26 12:24:28,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 741 transitions. [2023-08-26 12:24:28,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:28,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 741 transitions. [2023-08-26 12:24:28,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 67.36363636363636) internal successors, (741), 11 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:28,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 234.0) internal successors, (2808), 12 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:28,341 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 234.0) internal successors, (2808), 12 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:28,341 INFO L175 Difference]: Start difference. First operand has 56 places, 30 transitions, 248 flow. Second operand 11 states and 741 transitions. [2023-08-26 12:24:28,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 43 transitions, 403 flow [2023-08-26 12:24:28,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 43 transitions, 372 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-26 12:24:28,343 INFO L231 Difference]: Finished difference. Result has 58 places, 26 transitions, 229 flow [2023-08-26 12:24:28,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=229, PETRI_PLACES=58, PETRI_TRANSITIONS=26} [2023-08-26 12:24:28,343 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2023-08-26 12:24:28,343 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 26 transitions, 229 flow [2023-08-26 12:24:28,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 65.85714285714286) internal successors, (461), 7 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:28,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:28,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:24:28,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 12:24:28,344 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 12:24:28,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:28,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1321464207, now seen corresponding path program 1 times [2023-08-26 12:24:28,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:28,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840203174] [2023-08-26 12:24:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:28,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:28,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:28,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840203174] [2023-08-26 12:24:28,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840203174] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:28,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:28,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:24:28,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734453375] [2023-08-26 12:24:28,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:28,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:24:28,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:28,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:24:28,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:24:28,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 234 [2023-08-26 12:24:28,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 26 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:28,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:28,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 234 [2023-08-26 12:24:28,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:28,514 INFO L124 PetriNetUnfolderBase]: 17/67 cut-off events. [2023-08-26 12:24:28,514 INFO L125 PetriNetUnfolderBase]: For 385/385 co-relation queries the response was YES. [2023-08-26 12:24:28,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 67 events. 17/67 cut-off events. For 385/385 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 201 event pairs, 3 based on Foata normal form. 4/71 useless extension candidates. Maximal degree in co-relation 348. Up to 43 conditions per place. [2023-08-26 12:24:28,514 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-08-26 12:24:28,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 30 transitions, 302 flow [2023-08-26 12:24:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:24:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:24:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 361 transitions. [2023-08-26 12:24:28,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30854700854700856 [2023-08-26 12:24:28,516 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 361 transitions. [2023-08-26 12:24:28,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 361 transitions. [2023-08-26 12:24:28,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:28,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 361 transitions. [2023-08-26 12:24:28,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:28,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:28,518 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:28,518 INFO L175 Difference]: Start difference. First operand has 58 places, 26 transitions, 229 flow. Second operand 5 states and 361 transitions. [2023-08-26 12:24:28,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 30 transitions, 302 flow [2023-08-26 12:24:28,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 30 transitions, 246 flow, removed 3 selfloop flow, removed 12 redundant places. [2023-08-26 12:24:28,519 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2023-08-26 12:24:28,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2023-08-26 12:24:28,520 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2023-08-26 12:24:28,520 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2023-08-26 12:24:28,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:28,521 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 37 remaining) [2023-08-26 12:24:28,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 37 remaining) [2023-08-26 12:24:28,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 37 remaining) [2023-08-26 12:24:28,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 37 remaining) [2023-08-26 12:24:28,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 37 remaining) [2023-08-26 12:24:28,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 37 remaining) [2023-08-26 12:24:28,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 37 remaining) [2023-08-26 12:24:28,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 37 remaining) [2023-08-26 12:24:28,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 37 remaining) [2023-08-26 12:24:28,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 37 remaining) [2023-08-26 12:24:28,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 37 remaining) [2023-08-26 12:24:28,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 37 remaining) [2023-08-26 12:24:28,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (20 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 37 remaining) [2023-08-26 12:24:28,523 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 37 remaining) [2023-08-26 12:24:28,524 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 37 remaining) [2023-08-26 12:24:28,524 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 37 remaining) [2023-08-26 12:24:28,524 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 37 remaining) [2023-08-26 12:24:28,524 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 37 remaining) [2023-08-26 12:24:28,524 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 37 remaining) [2023-08-26 12:24:28,524 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 37 remaining) [2023-08-26 12:24:28,524 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 37 remaining) [2023-08-26 12:24:28,524 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 37 remaining) [2023-08-26 12:24:28,524 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 37 remaining) [2023-08-26 12:24:28,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 12:24:28,524 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:24:28,527 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 12:24:28,527 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:24:28,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:24:28 BasicIcfg [2023-08-26 12:24:28,529 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:24:28,529 INFO L158 Benchmark]: Toolchain (without parser) took 31258.05ms. Allocated memory was 339.7MB in the beginning and 419.4MB in the end (delta: 79.7MB). Free memory was 314.1MB in the beginning and 277.8MB in the end (delta: 36.4MB). Peak memory consumption was 118.3MB. Max. memory is 16.0GB. [2023-08-26 12:24:28,530 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 339.7MB. Free memory is still 316.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:24:28,530 INFO L158 Benchmark]: CACSL2BoogieTranslator took 511.64ms. Allocated memory is still 339.7MB. Free memory was 313.6MB in the beginning and 275.6MB in the end (delta: 38.1MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. [2023-08-26 12:24:28,530 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.41ms. Allocated memory is still 339.7MB. Free memory was 275.6MB in the beginning and 272.9MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-26 12:24:28,530 INFO L158 Benchmark]: Boogie Preprocessor took 37.69ms. Allocated memory is still 339.7MB. Free memory was 272.9MB in the beginning and 271.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:24:28,530 INFO L158 Benchmark]: RCFGBuilder took 421.61ms. Allocated memory is still 339.7MB. Free memory was 271.3MB in the beginning and 309.3MB in the end (delta: -37.9MB). Peak memory consumption was 20.8MB. Max. memory is 16.0GB. [2023-08-26 12:24:28,530 INFO L158 Benchmark]: TraceAbstraction took 30226.42ms. Allocated memory was 339.7MB in the beginning and 419.4MB in the end (delta: 79.7MB). Free memory was 308.2MB in the beginning and 277.8MB in the end (delta: 30.4MB). Peak memory consumption was 110.1MB. Max. memory is 16.0GB. [2023-08-26 12:24:28,531 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 339.7MB. Free memory is still 316.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 511.64ms. Allocated memory is still 339.7MB. Free memory was 313.6MB in the beginning and 275.6MB in the end (delta: 38.1MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 55.41ms. Allocated memory is still 339.7MB. Free memory was 275.6MB in the beginning and 272.9MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 37.69ms. Allocated memory is still 339.7MB. Free memory was 272.9MB in the beginning and 271.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 421.61ms. Allocated memory is still 339.7MB. Free memory was 271.3MB in the beginning and 309.3MB in the end (delta: -37.9MB). Peak memory consumption was 20.8MB. Max. memory is 16.0GB. * TraceAbstraction took 30226.42ms. Allocated memory was 339.7MB in the beginning and 419.4MB in the end (delta: 79.7MB). Free memory was 308.2MB in the beginning and 277.8MB in the end (delta: 30.4MB). Peak memory consumption was 110.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 1044]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [1044] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 25.8s, 116 PlacesBefore, 45 PlacesAfterwards, 112 TransitionsBefore, 41 TransitionsAfterwards, 1280 CoEnabledTransitionPairs, 7 FixpointIterations, 82 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 121 TotalNumberOfCompositions, 4946 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2196, independent: 1879, independent conditional: 0, independent unconditional: 1879, dependent: 317, dependent conditional: 0, dependent unconditional: 317, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 720, independent: 669, independent conditional: 0, independent unconditional: 669, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2196, independent: 1210, independent conditional: 0, independent unconditional: 1210, dependent: 266, dependent conditional: 0, dependent unconditional: 266, unknown: 720, unknown conditional: 0, unknown unconditional: 720] , Statistics on independence cache: Total cache size (in pairs): 112, Positive cache size: 87, Positive conditional cache size: 0, Positive unconditional cache size: 87, Negative cache size: 25, Negative conditional cache size: 0, Negative unconditional cache size: 25, 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: -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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 148 locations, 37 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: 30.1s, OverallIterations: 17, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 25.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 479 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 479 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 74 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 874 IncrementalHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 74 mSolverCounterUnsat, 9 mSDtfsCounter, 874 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=334occurred in iteration=9, InterpolantAutomatonStates: 81, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 130 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 113 ConstructedInterpolants, 0 QuantifiedInterpolants, 1073 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 0/0 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 26 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 12:24:28,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...