/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/09-regions_04-list2_nr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:35:32,325 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:35:32,411 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 18:35:32,416 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:35:32,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:35:32,447 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:35:32,447 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:35:32,448 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:35:32,448 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:35:32,452 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:35:32,452 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:35:32,452 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:35:32,452 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:35:32,453 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:35:32,454 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:35:32,454 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:35:32,454 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:35:32,454 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:35:32,455 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:35:32,455 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:35:32,455 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:35:32,457 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:35:32,457 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:35:32,458 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:35:32,458 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:35:32,458 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:35:32,458 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:35:32,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:35:32,459 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:35:32,459 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:35:32,460 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:35:32,460 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:35:32,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:35:32,460 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:35:32,461 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:35:32,461 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:35:32,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:35:32,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:35:32,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:35:32,806 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:35:32,807 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:35:32,808 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_04-list2_nr.i [2023-08-26 18:35:33,939 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:35:34,308 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:35:34,309 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_04-list2_nr.i [2023-08-26 18:35:34,332 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a78c569f/7cde9dfffc064236b46f6644a3527a1a/FLAG806846002 [2023-08-26 18:35:34,346 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a78c569f/7cde9dfffc064236b46f6644a3527a1a [2023-08-26 18:35:34,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:35:34,353 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:35:34,355 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:35:34,355 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:35:34,359 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:35:34,359 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:35:34" (1/1) ... [2023-08-26 18:35:34,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64978940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:35:34, skipping insertion in model container [2023-08-26 18:35:34,360 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:35:34" (1/1) ... [2023-08-26 18:35:34,415 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:35:34,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:35:34,920 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:35:34,943 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 18:35:34,945 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 18:35:34,956 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [1044] [2023-08-26 18:35:34,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:35:35,063 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:35:35,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:35:35 WrapperNode [2023-08-26 18:35:35,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:35:35,065 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:35:35,065 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:35:35,065 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:35:35,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:35:35" (1/1) ... [2023-08-26 18:35:35,104 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:35:35" (1/1) ... [2023-08-26 18:35:35,134 INFO L138 Inliner]: procedures = 368, calls = 45, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 86 [2023-08-26 18:35:35,135 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:35:35,135 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:35:35,135 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:35:35,136 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:35:35,142 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:35:35" (1/1) ... [2023-08-26 18:35:35,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:35:35" (1/1) ... [2023-08-26 18:35:35,155 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:35:35" (1/1) ... [2023-08-26 18:35:35,156 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:35:35" (1/1) ... [2023-08-26 18:35:35,162 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:35:35" (1/1) ... [2023-08-26 18:35:35,163 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:35:35" (1/1) ... [2023-08-26 18:35:35,178 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:35:35" (1/1) ... [2023-08-26 18:35:35,180 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:35:35" (1/1) ... [2023-08-26 18:35:35,182 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:35:35,183 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:35:35,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:35:35,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:35:35,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:35:35" (1/1) ... [2023-08-26 18:35:35,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:35:35,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:35:35,230 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 18:35:35,234 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 18:35:35,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:35:35,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-26 18:35:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:35:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:35:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:35:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 18:35:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-26 18:35:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:35:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-26 18:35:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 18:35:35,269 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 18:35:35,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:35:35,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:35:35,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:35:35,270 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 18:35:35,390 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:35:35,392 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:35:35,679 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:35:35,686 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:35:35,686 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:35:35,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:35:35 BoogieIcfgContainer [2023-08-26 18:35:35,688 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:35:35,690 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:35:35,690 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:35:35,692 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:35:35,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:35:34" (1/3) ... [2023-08-26 18:35:35,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d5ed9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:35:35, skipping insertion in model container [2023-08-26 18:35:35,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:35:35" (2/3) ... [2023-08-26 18:35:35,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d5ed9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:35:35, skipping insertion in model container [2023-08-26 18:35:35,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:35:35" (3/3) ... [2023-08-26 18:35:35,694 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_04-list2_nr.i [2023-08-26 18:35:35,708 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:35:35,709 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-08-26 18:35:35,709 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:35:35,774 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:35:35,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 159 transitions, 323 flow [2023-08-26 18:35:35,896 INFO L124 PetriNetUnfolderBase]: 0/158 cut-off events. [2023-08-26 18:35:35,896 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:35:35,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 158 events. 0/158 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 218 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-08-26 18:35:35,900 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 159 transitions, 323 flow [2023-08-26 18:35:35,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 158 transitions, 319 flow [2023-08-26 18:35:35,911 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:35:35,923 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 158 transitions, 319 flow [2023-08-26 18:35:35,930 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 158 transitions, 319 flow [2023-08-26 18:35:35,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 158 transitions, 319 flow [2023-08-26 18:35:35,985 INFO L124 PetriNetUnfolderBase]: 0/158 cut-off events. [2023-08-26 18:35:35,985 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:35:35,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 158 events. 0/158 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 219 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-08-26 18:35:35,989 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2023-08-26 18:36:01,759 WARN L234 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 186 DAG size of output: 180 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-26 18:37:00,382 WARN L234 SmtUtils]: Spent 36.20s on a formula simplification. DAG size of input: 334 DAG size of output: 322 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-26 18:37:19,006 WARN L234 SmtUtils]: Spent 18.62s on a formula simplification that was a NOOP. DAG size: 287 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-26 18:37:54,357 WARN L234 SmtUtils]: Spent 35.35s on a formula simplification. DAG size of input: 337 DAG size of output: 325 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-26 18:38:06,137 WARN L234 SmtUtils]: Spent 11.77s on a formula simplification that was a NOOP. DAG size: 291 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-26 18:38:06,282 INFO L134 LiptonReduction]: Checked pairs total: 12363 [2023-08-26 18:38:06,283 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-08-26 18:38:06,294 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:38:06,298 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;@aa510e8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:38:06,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-08-26 18:38:06,300 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:38:06,300 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:38:06,300 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:38:06,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:06,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:38:06,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:06,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:06,305 INFO L85 PathProgramCache]: Analyzing trace with hash 574, now seen corresponding path program 1 times [2023-08-26 18:38:06,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:06,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228604596] [2023-08-26 18:38:06,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:06,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:06,422 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 18:38:06,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:06,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228604596] [2023-08-26 18:38:06,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228604596] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:06,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:06,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:38:06,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343935958] [2023-08-26 18:38:06,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:06,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:38:06,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:06,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:38:06,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:38:06,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 375 [2023-08-26 18:38:06,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 127 flow. Second operand has 2 states, 2 states have (on average 158.5) internal successors, (317), 2 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 18:38:06,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:06,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 375 [2023-08-26 18:38:06,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:06,693 INFO L124 PetriNetUnfolderBase]: 180/455 cut-off events. [2023-08-26 18:38:06,693 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:38:06,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 849 conditions, 455 events. 180/455 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2413 event pairs, 180 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 840. Up to 390 conditions per place. [2023-08-26 18:38:06,699 INFO L140 encePairwiseOnDemand]: 351/375 looper letters, 29 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2023-08-26 18:38:06,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 137 flow [2023-08-26 18:38:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:38:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:38:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 369 transitions. [2023-08-26 18:38:06,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.492 [2023-08-26 18:38:06,727 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 369 transitions. [2023-08-26 18:38:06,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 369 transitions. [2023-08-26 18:38:06,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:06,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 369 transitions. [2023-08-26 18:38:06,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 184.5) internal successors, (369), 2 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 18:38:06,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:06,749 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:06,751 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 127 flow. Second operand 2 states and 369 transitions. [2023-08-26 18:38:06,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 137 flow [2023-08-26 18:38:06,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:38:06,759 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 78 flow [2023-08-26 18:38:06,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-08-26 18:38:06,765 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -24 predicate places. [2023-08-26 18:38:06,765 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 78 flow [2023-08-26 18:38:06,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 158.5) internal successors, (317), 2 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 18:38:06,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:06,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 18:38:06,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:38:06,766 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:06,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:06,767 INFO L85 PathProgramCache]: Analyzing trace with hash 590119, now seen corresponding path program 1 times [2023-08-26 18:38:06,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:06,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841500816] [2023-08-26 18:38:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:06,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:07,369 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 18:38:07,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:07,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841500816] [2023-08-26 18:38:07,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841500816] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:07,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:07,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:38:07,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403423297] [2023-08-26 18:38:07,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:07,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:38:07,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:07,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:38:07,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:38:07,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 375 [2023-08-26 18:38:07,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:07,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:07,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 375 [2023-08-26 18:38:07,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:07,540 INFO L124 PetriNetUnfolderBase]: 210/493 cut-off events. [2023-08-26 18:38:07,540 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:38:07,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 493 events. 210/493 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2484 event pairs, 210 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 946. Up to 451 conditions per place. [2023-08-26 18:38:07,544 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 30 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-26 18:38:07,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 36 transitions, 136 flow [2023-08-26 18:38:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:38:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:38:07,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-26 18:38:07,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.304 [2023-08-26 18:38:07,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-26 18:38:07,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-26 18:38:07,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:07,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-26 18:38:07,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:07,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:07,552 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:07,552 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 78 flow. Second operand 3 states and 342 transitions. [2023-08-26 18:38:07,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 36 transitions, 136 flow [2023-08-26 18:38:07,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:38:07,553 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 76 flow [2023-08-26 18:38:07,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2023-08-26 18:38:07,554 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -24 predicate places. [2023-08-26 18:38:07,554 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 76 flow [2023-08-26 18:38:07,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:07,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:07,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 18:38:07,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:38:07,555 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:07,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:07,556 INFO L85 PathProgramCache]: Analyzing trace with hash 590121, now seen corresponding path program 1 times [2023-08-26 18:38:07,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:07,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335001777] [2023-08-26 18:38:07,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:07,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:07,922 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 18:38:07,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:07,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335001777] [2023-08-26 18:38:07,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335001777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:07,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:07,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:38:07,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132556690] [2023-08-26 18:38:07,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:07,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:38:07,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:07,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:38:07,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:38:07,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 375 [2023-08-26 18:38:07,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:07,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:07,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 375 [2023-08-26 18:38:07,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:08,089 INFO L124 PetriNetUnfolderBase]: 232/525 cut-off events. [2023-08-26 18:38:08,089 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:38:08,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 525 events. 232/525 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2633 event pairs, 216 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 1045. Up to 481 conditions per place. [2023-08-26 18:38:08,093 INFO L140 encePairwiseOnDemand]: 369/375 looper letters, 46 selfloop transitions, 4 changer transitions 2/53 dead transitions. [2023-08-26 18:38:08,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 214 flow [2023-08-26 18:38:08,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:38:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:38:08,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-08-26 18:38:08,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31733333333333336 [2023-08-26 18:38:08,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-08-26 18:38:08,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-08-26 18:38:08,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:08,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-08-26 18:38:08,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 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 18:38:08,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:08,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:08,100 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 76 flow. Second operand 3 states and 357 transitions. [2023-08-26 18:38:08,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 214 flow [2023-08-26 18:38:08,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 53 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:38:08,102 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 99 flow [2023-08-26 18:38:08,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-08-26 18:38:08,103 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -22 predicate places. [2023-08-26 18:38:08,103 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 99 flow [2023-08-26 18:38:08,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:08,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:08,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 18:38:08,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:38:08,104 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:08,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash 18291946, now seen corresponding path program 1 times [2023-08-26 18:38:08,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:08,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581920420] [2023-08-26 18:38:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:08,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:38:09,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:09,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581920420] [2023-08-26 18:38:09,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581920420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:09,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:09,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:38:09,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173370508] [2023-08-26 18:38:09,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:09,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:38:09,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:09,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:38:09,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:38:09,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 375 [2023-08-26 18:38:09,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:09,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:09,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 375 [2023-08-26 18:38:09,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:09,474 INFO L124 PetriNetUnfolderBase]: 164/412 cut-off events. [2023-08-26 18:38:09,474 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-26 18:38:09,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 835 conditions, 412 events. 164/412 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2116 event pairs, 44 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 830. Up to 280 conditions per place. [2023-08-26 18:38:09,477 INFO L140 encePairwiseOnDemand]: 371/375 looper letters, 40 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-26 18:38:09,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 201 flow [2023-08-26 18:38:09,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:38:09,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:38:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2023-08-26 18:38:09,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3128888888888889 [2023-08-26 18:38:09,479 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2023-08-26 18:38:09,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2023-08-26 18:38:09,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:09,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2023-08-26 18:38:09,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:09,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:09,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:09,484 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 99 flow. Second operand 3 states and 352 transitions. [2023-08-26 18:38:09,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 201 flow [2023-08-26 18:38:09,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 193 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:38:09,486 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 91 flow [2023-08-26 18:38:09,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-08-26 18:38:09,487 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -22 predicate places. [2023-08-26 18:38:09,487 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 91 flow [2023-08-26 18:38:09,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:09,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:09,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 18:38:09,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:38:09,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:09,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:09,488 INFO L85 PathProgramCache]: Analyzing trace with hash 18292333, now seen corresponding path program 1 times [2023-08-26 18:38:09,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:09,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642946349] [2023-08-26 18:38:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:09,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:10,325 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 18:38:10,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:10,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642946349] [2023-08-26 18:38:10,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642946349] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:10,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:10,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:38:10,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771263686] [2023-08-26 18:38:10,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:10,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:38:10,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:10,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:38:10,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:38:10,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 375 [2023-08-26 18:38:10,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:10,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:10,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 375 [2023-08-26 18:38:10,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:10,540 INFO L124 PetriNetUnfolderBase]: 208/472 cut-off events. [2023-08-26 18:38:10,540 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-26 18:38:10,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1018 conditions, 472 events. 208/472 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2363 event pairs, 83 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 1012. Up to 349 conditions per place. [2023-08-26 18:38:10,544 INFO L140 encePairwiseOnDemand]: 370/375 looper letters, 46 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-26 18:38:10,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 228 flow [2023-08-26 18:38:10,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:38:10,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:38:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-08-26 18:38:10,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31466666666666665 [2023-08-26 18:38:10,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-08-26 18:38:10,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-08-26 18:38:10,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:10,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-08-26 18:38:10,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:10,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:10,550 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:10,550 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 91 flow. Second operand 3 states and 354 transitions. [2023-08-26 18:38:10,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 228 flow [2023-08-26 18:38:10,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:38:10,552 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 112 flow [2023-08-26 18:38:10,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-26 18:38:10,555 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -21 predicate places. [2023-08-26 18:38:10,555 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 112 flow [2023-08-26 18:38:10,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:10,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:10,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 18:38:10,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:38:10,555 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:10,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:10,556 INFO L85 PathProgramCache]: Analyzing trace with hash 567047493, now seen corresponding path program 1 times [2023-08-26 18:38:10,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:10,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232658954] [2023-08-26 18:38:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:10,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:38:11,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:11,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232658954] [2023-08-26 18:38:11,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232658954] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:11,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:11,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:38:11,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411735842] [2023-08-26 18:38:11,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:11,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:38:11,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:11,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:38:11,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:38:11,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 375 [2023-08-26 18:38:11,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:11,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:11,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 375 [2023-08-26 18:38:11,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:11,348 INFO L124 PetriNetUnfolderBase]: 186/424 cut-off events. [2023-08-26 18:38:11,348 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-26 18:38:11,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 424 events. 186/424 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2122 event pairs, 43 based on Foata normal form. 13/312 useless extension candidates. Maximal degree in co-relation 964. Up to 346 conditions per place. [2023-08-26 18:38:11,351 INFO L140 encePairwiseOnDemand]: 368/375 looper letters, 53 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2023-08-26 18:38:11,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 61 transitions, 288 flow [2023-08-26 18:38:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:38:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:38:11,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 553 transitions. [2023-08-26 18:38:11,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2949333333333333 [2023-08-26 18:38:11,354 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 553 transitions. [2023-08-26 18:38:11,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 553 transitions. [2023-08-26 18:38:11,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:11,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 553 transitions. [2023-08-26 18:38:11,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:11,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:11,361 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:11,361 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 112 flow. Second operand 5 states and 553 transitions. [2023-08-26 18:38:11,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 61 transitions, 288 flow [2023-08-26 18:38:11,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:38:11,365 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 156 flow [2023-08-26 18:38:11,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-26 18:38:11,367 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -15 predicate places. [2023-08-26 18:38:11,367 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 156 flow [2023-08-26 18:38:11,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:11,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:11,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:11,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:38:11,368 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:11,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:11,368 INFO L85 PathProgramCache]: Analyzing trace with hash -514909174, now seen corresponding path program 1 times [2023-08-26 18:38:11,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:11,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423600094] [2023-08-26 18:38:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:11,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:38:11,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:11,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423600094] [2023-08-26 18:38:11,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423600094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:11,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:11,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:38:11,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225190428] [2023-08-26 18:38:11,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:11,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:38:11,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:11,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:38:11,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:38:11,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 375 [2023-08-26 18:38:11,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 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 18:38:11,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:11,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 375 [2023-08-26 18:38:11,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:11,651 INFO L124 PetriNetUnfolderBase]: 147/356 cut-off events. [2023-08-26 18:38:11,651 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-08-26 18:38:11,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 356 events. 147/356 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1686 event pairs, 145 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 844. Up to 335 conditions per place. [2023-08-26 18:38:11,653 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 32 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-26 18:38:11,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 218 flow [2023-08-26 18:38:11,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:38:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:38:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-26 18:38:11,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30044444444444446 [2023-08-26 18:38:11,656 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-26 18:38:11,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-26 18:38:11,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:11,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-26 18:38:11,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:11,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:11,659 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:11,659 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 156 flow. Second operand 3 states and 338 transitions. [2023-08-26 18:38:11,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 218 flow [2023-08-26 18:38:11,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 38 transitions, 209 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 18:38:11,661 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 145 flow [2023-08-26 18:38:11,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2023-08-26 18:38:11,662 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -16 predicate places. [2023-08-26 18:38:11,662 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 145 flow [2023-08-26 18:38:11,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 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 18:38:11,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:11,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:11,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:38:11,663 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:11,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:11,663 INFO L85 PathProgramCache]: Analyzing trace with hash -514909173, now seen corresponding path program 1 times [2023-08-26 18:38:11,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:11,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690038945] [2023-08-26 18:38:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:11,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:11,782 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 18:38:11,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:11,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690038945] [2023-08-26 18:38:11,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690038945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:11,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:11,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:38:11,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451283016] [2023-08-26 18:38:11,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:11,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:38:11,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:11,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:38:11,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:38:11,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 375 [2023-08-26 18:38:11,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:11,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:11,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 375 [2023-08-26 18:38:11,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:11,960 INFO L124 PetriNetUnfolderBase]: 132/324 cut-off events. [2023-08-26 18:38:11,960 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-08-26 18:38:11,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 324 events. 132/324 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1465 event pairs, 122 based on Foata normal form. 14/266 useless extension candidates. Maximal degree in co-relation 777. Up to 283 conditions per place. [2023-08-26 18:38:11,962 INFO L140 encePairwiseOnDemand]: 369/375 looper letters, 38 selfloop transitions, 6 changer transitions 2/47 dead transitions. [2023-08-26 18:38:11,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 255 flow [2023-08-26 18:38:11,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:38:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:38:11,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-08-26 18:38:11,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30933333333333335 [2023-08-26 18:38:11,964 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-08-26 18:38:11,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-08-26 18:38:11,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:11,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-08-26 18:38:11,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:11,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:11,968 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:11,968 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 145 flow. Second operand 3 states and 348 transitions. [2023-08-26 18:38:11,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 255 flow [2023-08-26 18:38:11,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:38:11,971 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 171 flow [2023-08-26 18:38:11,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-08-26 18:38:11,973 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -15 predicate places. [2023-08-26 18:38:11,973 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 171 flow [2023-08-26 18:38:11,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:11,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:11,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:11,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:38:11,975 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:11,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:11,982 INFO L85 PathProgramCache]: Analyzing trace with hash 911040734, now seen corresponding path program 1 times [2023-08-26 18:38:11,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:11,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589402086] [2023-08-26 18:38:11,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:11,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:12,064 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 18:38:12,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:12,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589402086] [2023-08-26 18:38:12,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589402086] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:12,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:12,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:38:12,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198218951] [2023-08-26 18:38:12,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:12,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:38:12,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:12,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:38:12,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:38:12,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 375 [2023-08-26 18:38:12,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:12,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:12,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 375 [2023-08-26 18:38:12,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:12,333 INFO L124 PetriNetUnfolderBase]: 88/266 cut-off events. [2023-08-26 18:38:12,334 INFO L125 PetriNetUnfolderBase]: For 129/134 co-relation queries the response was YES. [2023-08-26 18:38:12,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 714 conditions, 266 events. 88/266 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1405 event pairs, 32 based on Foata normal form. 6/224 useless extension candidates. Maximal degree in co-relation 703. Up to 137 conditions per place. [2023-08-26 18:38:12,336 INFO L140 encePairwiseOnDemand]: 369/375 looper letters, 47 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2023-08-26 18:38:12,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 379 flow [2023-08-26 18:38:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:38:12,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:38:12,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-26 18:38:12,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231111111111111 [2023-08-26 18:38:12,338 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-26 18:38:12,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-26 18:38:12,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:12,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-26 18:38:12,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:12,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:12,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:12,341 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 171 flow. Second operand 3 states and 476 transitions. [2023-08-26 18:38:12,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 379 flow [2023-08-26 18:38:12,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 361 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:38:12,346 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 193 flow [2023-08-26 18:38:12,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-26 18:38:12,346 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -14 predicate places. [2023-08-26 18:38:12,347 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 193 flow [2023-08-26 18:38:12,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:12,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:12,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:12,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:38:12,347 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:12,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:12,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1217680047, now seen corresponding path program 1 times [2023-08-26 18:38:12,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:12,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756257134] [2023-08-26 18:38:12,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:12,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:12,723 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 18:38:12,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:12,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756257134] [2023-08-26 18:38:12,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756257134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:12,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:12,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:38:12,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53653633] [2023-08-26 18:38:12,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:12,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:38:12,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:12,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:38:12,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:38:12,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 375 [2023-08-26 18:38:12,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 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 18:38:12,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:12,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 375 [2023-08-26 18:38:12,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:12,912 INFO L124 PetriNetUnfolderBase]: 100/285 cut-off events. [2023-08-26 18:38:12,913 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-08-26 18:38:12,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 285 events. 100/285 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1465 event pairs, 57 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 829. Up to 220 conditions per place. [2023-08-26 18:38:12,914 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 42 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-26 18:38:12,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 51 transitions, 312 flow [2023-08-26 18:38:12,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:38:12,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:38:12,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-26 18:38:12,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30577777777777776 [2023-08-26 18:38:12,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-26 18:38:12,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-26 18:38:12,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:12,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-26 18:38:12,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:12,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:12,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:12,920 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 193 flow. Second operand 3 states and 344 transitions. [2023-08-26 18:38:12,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 51 transitions, 312 flow [2023-08-26 18:38:12,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:38:12,924 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 201 flow [2023-08-26 18:38:12,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2023-08-26 18:38:12,925 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -12 predicate places. [2023-08-26 18:38:12,925 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 201 flow [2023-08-26 18:38:12,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 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 18:38:12,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:12,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:12,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 18:38:12,926 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:12,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:12,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1217680048, now seen corresponding path program 1 times [2023-08-26 18:38:12,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:12,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345841652] [2023-08-26 18:38:12,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:12,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:13,211 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 18:38:13,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:13,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345841652] [2023-08-26 18:38:13,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345841652] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:13,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:13,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:38:13,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497866762] [2023-08-26 18:38:13,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:13,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:38:13,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:13,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:38:13,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:38:13,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 375 [2023-08-26 18:38:13,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:13,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:13,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 375 [2023-08-26 18:38:13,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:13,413 INFO L124 PetriNetUnfolderBase]: 107/294 cut-off events. [2023-08-26 18:38:13,413 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-08-26 18:38:13,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 294 events. 107/294 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1506 event pairs, 69 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 871. Up to 266 conditions per place. [2023-08-26 18:38:13,415 INFO L140 encePairwiseOnDemand]: 371/375 looper letters, 46 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-26 18:38:13,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 51 transitions, 327 flow [2023-08-26 18:38:13,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:38:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:38:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-08-26 18:38:13,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30666666666666664 [2023-08-26 18:38:13,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-08-26 18:38:13,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-08-26 18:38:13,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:13,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-08-26 18:38:13,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:13,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:13,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:13,421 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 201 flow. Second operand 3 states and 345 transitions. [2023-08-26 18:38:13,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 51 transitions, 327 flow [2023-08-26 18:38:13,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 51 transitions, 319 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:38:13,424 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 207 flow [2023-08-26 18:38:13,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=207, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-26 18:38:13,424 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -11 predicate places. [2023-08-26 18:38:13,424 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 207 flow [2023-08-26 18:38:13,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:13,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:13,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:13,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 18:38:13,425 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:13,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:13,425 INFO L85 PathProgramCache]: Analyzing trace with hash -729040182, now seen corresponding path program 1 times [2023-08-26 18:38:13,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:13,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589107750] [2023-08-26 18:38:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:13,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:14,561 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 18:38:14,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:14,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589107750] [2023-08-26 18:38:14,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589107750] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:14,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:14,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:38:14,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922689733] [2023-08-26 18:38:14,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:14,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:38:14,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:14,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:38:14,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:38:14,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 375 [2023-08-26 18:38:14,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 95.8) internal successors, (479), 5 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:14,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:14,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 375 [2023-08-26 18:38:14,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:14,847 INFO L124 PetriNetUnfolderBase]: 80/240 cut-off events. [2023-08-26 18:38:14,847 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-26 18:38:14,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 240 events. 80/240 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1159 event pairs, 32 based on Foata normal form. 6/230 useless extension candidates. Maximal degree in co-relation 738. Up to 128 conditions per place. [2023-08-26 18:38:14,849 INFO L140 encePairwiseOnDemand]: 369/375 looper letters, 48 selfloop transitions, 7 changer transitions 3/60 dead transitions. [2023-08-26 18:38:14,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 380 flow [2023-08-26 18:38:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:38:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:38:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 520 transitions. [2023-08-26 18:38:14,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2773333333333333 [2023-08-26 18:38:14,852 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 520 transitions. [2023-08-26 18:38:14,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 520 transitions. [2023-08-26 18:38:14,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:14,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 520 transitions. [2023-08-26 18:38:14,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:14,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:14,857 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:14,857 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 207 flow. Second operand 5 states and 520 transitions. [2023-08-26 18:38:14,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 380 flow [2023-08-26 18:38:14,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:38:14,859 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 211 flow [2023-08-26 18:38:14,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2023-08-26 18:38:14,860 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -9 predicate places. [2023-08-26 18:38:14,860 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 211 flow [2023-08-26 18:38:14,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.8) internal successors, (479), 5 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:14,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:14,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:14,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 18:38:14,861 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:14,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:14,861 INFO L85 PathProgramCache]: Analyzing trace with hash -729038114, now seen corresponding path program 1 times [2023-08-26 18:38:14,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:14,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655286224] [2023-08-26 18:38:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:14,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:15,294 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 18:38:15,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:15,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655286224] [2023-08-26 18:38:15,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655286224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:15,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:15,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:38:15,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195200263] [2023-08-26 18:38:15,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:15,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:38:15,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:15,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:38:15,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:38:15,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 375 [2023-08-26 18:38:15,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 211 flow. Second operand has 6 states, 6 states have (on average 99.5) internal successors, (597), 6 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:15,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:15,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 375 [2023-08-26 18:38:15,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:15,626 INFO L124 PetriNetUnfolderBase]: 84/254 cut-off events. [2023-08-26 18:38:15,627 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-08-26 18:38:15,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 254 events. 84/254 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1246 event pairs, 50 based on Foata normal form. 6/243 useless extension candidates. Maximal degree in co-relation 812. Up to 143 conditions per place. [2023-08-26 18:38:15,628 INFO L140 encePairwiseOnDemand]: 368/375 looper letters, 46 selfloop transitions, 11 changer transitions 4/62 dead transitions. [2023-08-26 18:38:15,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 405 flow [2023-08-26 18:38:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:38:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:38:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 642 transitions. [2023-08-26 18:38:15,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2853333333333333 [2023-08-26 18:38:15,632 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 642 transitions. [2023-08-26 18:38:15,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 642 transitions. [2023-08-26 18:38:15,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:15,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 642 transitions. [2023-08-26 18:38:15,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:15,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:15,638 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:15,638 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 211 flow. Second operand 6 states and 642 transitions. [2023-08-26 18:38:15,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 405 flow [2023-08-26 18:38:15,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 389 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 18:38:15,641 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 229 flow [2023-08-26 18:38:15,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=229, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2023-08-26 18:38:15,642 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -7 predicate places. [2023-08-26 18:38:15,642 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 229 flow [2023-08-26 18:38:15,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.5) internal successors, (597), 6 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:15,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:15,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:15,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 18:38:15,643 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:15,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:15,643 INFO L85 PathProgramCache]: Analyzing trace with hash -729038115, now seen corresponding path program 1 times [2023-08-26 18:38:15,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:15,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680743895] [2023-08-26 18:38:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:15,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:16,418 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 18:38:16,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:16,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680743895] [2023-08-26 18:38:16,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680743895] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:16,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:16,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:38:16,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043058678] [2023-08-26 18:38:16,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:16,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:38:16,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:16,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:38:16,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:38:16,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 375 [2023-08-26 18:38:16,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 101.5) internal successors, (609), 6 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:16,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:16,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 375 [2023-08-26 18:38:16,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:16,804 INFO L124 PetriNetUnfolderBase]: 67/227 cut-off events. [2023-08-26 18:38:16,804 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2023-08-26 18:38:16,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 227 events. 67/227 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1130 event pairs, 43 based on Foata normal form. 5/231 useless extension candidates. Maximal degree in co-relation 764. Up to 134 conditions per place. [2023-08-26 18:38:16,805 INFO L140 encePairwiseOnDemand]: 370/375 looper letters, 38 selfloop transitions, 7 changer transitions 2/50 dead transitions. [2023-08-26 18:38:16,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 50 transitions, 351 flow [2023-08-26 18:38:16,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:38:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:38:16,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 438 transitions. [2023-08-26 18:38:16,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.292 [2023-08-26 18:38:16,808 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 438 transitions. [2023-08-26 18:38:16,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 438 transitions. [2023-08-26 18:38:16,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:16,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 438 transitions. [2023-08-26 18:38:16,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:16,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:16,812 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:16,812 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 229 flow. Second operand 4 states and 438 transitions. [2023-08-26 18:38:16,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 50 transitions, 351 flow [2023-08-26 18:38:16,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 336 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 18:38:16,815 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 237 flow [2023-08-26 18:38:16,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=60, PETRI_TRANSITIONS=41} [2023-08-26 18:38:16,816 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2023-08-26 18:38:16,816 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 237 flow [2023-08-26 18:38:16,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.5) internal successors, (609), 6 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:16,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:16,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:16,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 18:38:16,817 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:16,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:16,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1125411266, now seen corresponding path program 1 times [2023-08-26 18:38:16,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:16,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79328715] [2023-08-26 18:38:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:16,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:17,361 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 18:38:17,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:17,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79328715] [2023-08-26 18:38:17,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79328715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:17,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:17,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:38:17,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14544132] [2023-08-26 18:38:17,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:17,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:38:17,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:17,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:38:17,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:38:17,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 375 [2023-08-26 18:38:17,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 90.66666666666667) internal successors, (544), 6 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:17,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:17,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 375 [2023-08-26 18:38:17,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:17,715 INFO L124 PetriNetUnfolderBase]: 53/191 cut-off events. [2023-08-26 18:38:17,715 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2023-08-26 18:38:17,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 714 conditions, 191 events. 53/191 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 885 event pairs, 8 based on Foata normal form. 16/199 useless extension candidates. Maximal degree in co-relation 698. Up to 102 conditions per place. [2023-08-26 18:38:17,717 INFO L140 encePairwiseOnDemand]: 365/375 looper letters, 55 selfloop transitions, 9 changer transitions 4/69 dead transitions. [2023-08-26 18:38:17,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 69 transitions, 471 flow [2023-08-26 18:38:17,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:38:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:38:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 689 transitions. [2023-08-26 18:38:17,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2624761904761905 [2023-08-26 18:38:17,720 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 689 transitions. [2023-08-26 18:38:17,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 689 transitions. [2023-08-26 18:38:17,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:17,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 689 transitions. [2023-08-26 18:38:17,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.42857142857143) internal successors, (689), 7 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:17,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 375.0) internal successors, (3000), 8 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:17,726 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 375.0) internal successors, (3000), 8 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:17,726 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 237 flow. Second operand 7 states and 689 transitions. [2023-08-26 18:38:17,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 69 transitions, 471 flow [2023-08-26 18:38:17,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 69 transitions, 455 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:38:17,729 INFO L231 Difference]: Finished difference. Result has 67 places, 42 transitions, 275 flow [2023-08-26 18:38:17,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=275, PETRI_PLACES=67, PETRI_TRANSITIONS=42} [2023-08-26 18:38:17,730 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2023-08-26 18:38:17,730 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 42 transitions, 275 flow [2023-08-26 18:38:17,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.66666666666667) internal successors, (544), 6 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:17,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:17,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:17,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 18:38:17,730 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:17,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:17,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1764327273, now seen corresponding path program 1 times [2023-08-26 18:38:17,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:17,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798845435] [2023-08-26 18:38:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:17,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:17,817 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 18:38:17,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:17,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798845435] [2023-08-26 18:38:17,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798845435] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:17,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:17,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:38:17,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997527243] [2023-08-26 18:38:17,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:17,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:38:17,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:17,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:38:17,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:38:17,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 375 [2023-08-26 18:38:17,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 42 transitions, 275 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:17,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:17,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 375 [2023-08-26 18:38:17,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:17,951 INFO L124 PetriNetUnfolderBase]: 53/182 cut-off events. [2023-08-26 18:38:17,952 INFO L125 PetriNetUnfolderBase]: For 378/378 co-relation queries the response was YES. [2023-08-26 18:38:17,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 182 events. 53/182 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 827 event pairs, 43 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 717. Up to 128 conditions per place. [2023-08-26 18:38:17,953 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 39 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2023-08-26 18:38:17,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 45 transitions, 372 flow [2023-08-26 18:38:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:38:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:38:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 428 transitions. [2023-08-26 18:38:17,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2853333333333333 [2023-08-26 18:38:17,955 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 428 transitions. [2023-08-26 18:38:17,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 428 transitions. [2023-08-26 18:38:17,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:17,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 428 transitions. [2023-08-26 18:38:17,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:17,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:17,959 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:17,959 INFO L175 Difference]: Start difference. First operand has 67 places, 42 transitions, 275 flow. Second operand 4 states and 428 transitions. [2023-08-26 18:38:17,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 45 transitions, 372 flow [2023-08-26 18:38:17,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 45 transitions, 331 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-26 18:38:17,962 INFO L231 Difference]: Finished difference. Result has 61 places, 41 transitions, 239 flow [2023-08-26 18:38:17,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=61, PETRI_TRANSITIONS=41} [2023-08-26 18:38:17,962 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -5 predicate places. [2023-08-26 18:38:17,963 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 41 transitions, 239 flow [2023-08-26 18:38:17,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:17,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:17,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:17,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 18:38:17,963 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:17,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:17,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1140561147, now seen corresponding path program 1 times [2023-08-26 18:38:17,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:17,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203196573] [2023-08-26 18:38:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:17,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:18,436 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 18:38:18,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:18,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203196573] [2023-08-26 18:38:18,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203196573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:18,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:18,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:38:18,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915467234] [2023-08-26 18:38:18,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:18,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:38:18,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:18,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:38:18,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:38:18,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 375 [2023-08-26 18:38:18,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 41 transitions, 239 flow. Second operand has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:18,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:18,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 375 [2023-08-26 18:38:18,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:19,060 INFO L124 PetriNetUnfolderBase]: 54/174 cut-off events. [2023-08-26 18:38:19,061 INFO L125 PetriNetUnfolderBase]: For 229/229 co-relation queries the response was YES. [2023-08-26 18:38:19,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 174 events. 54/174 cut-off events. For 229/229 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 725 event pairs, 25 based on Foata normal form. 4/175 useless extension candidates. Maximal degree in co-relation 626. Up to 133 conditions per place. [2023-08-26 18:38:19,062 INFO L140 encePairwiseOnDemand]: 366/375 looper letters, 41 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2023-08-26 18:38:19,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 408 flow [2023-08-26 18:38:19,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:38:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:38:19,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2023-08-26 18:38:19,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2342857142857143 [2023-08-26 18:38:19,065 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2023-08-26 18:38:19,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2023-08-26 18:38:19,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:19,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2023-08-26 18:38:19,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:19,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 375.0) internal successors, (3000), 8 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:19,070 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 375.0) internal successors, (3000), 8 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:19,070 INFO L175 Difference]: Start difference. First operand has 61 places, 41 transitions, 239 flow. Second operand 7 states and 615 transitions. [2023-08-26 18:38:19,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 408 flow [2023-08-26 18:38:19,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 55 transitions, 397 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 18:38:19,073 INFO L231 Difference]: Finished difference. Result has 66 places, 46 transitions, 305 flow [2023-08-26 18:38:19,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=305, PETRI_PLACES=66, PETRI_TRANSITIONS=46} [2023-08-26 18:38:19,073 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2023-08-26 18:38:19,073 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 46 transitions, 305 flow [2023-08-26 18:38:19,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:19,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:19,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:19,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 18:38:19,074 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:19,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1140429087, now seen corresponding path program 2 times [2023-08-26 18:38:19,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:19,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555031767] [2023-08-26 18:38:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:19,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:19,632 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 18:38:19,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:19,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555031767] [2023-08-26 18:38:19,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555031767] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:19,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:19,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 18:38:19,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053404459] [2023-08-26 18:38:19,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:19,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:38:19,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:19,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:38:19,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:38:19,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 375 [2023-08-26 18:38:19,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 46 transitions, 305 flow. Second operand has 8 states, 8 states have (on average 82.5) internal successors, (660), 8 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:19,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:19,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 375 [2023-08-26 18:38:19,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:20,090 INFO L124 PetriNetUnfolderBase]: 54/172 cut-off events. [2023-08-26 18:38:20,091 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2023-08-26 18:38:20,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 693 conditions, 172 events. 54/172 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 708 event pairs, 25 based on Foata normal form. 2/171 useless extension candidates. Maximal degree in co-relation 675. Up to 125 conditions per place. [2023-08-26 18:38:20,092 INFO L140 encePairwiseOnDemand]: 367/375 looper letters, 39 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2023-08-26 18:38:20,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 54 transitions, 439 flow [2023-08-26 18:38:20,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 18:38:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 18:38:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 695 transitions. [2023-08-26 18:38:20,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23166666666666666 [2023-08-26 18:38:20,095 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 695 transitions. [2023-08-26 18:38:20,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 695 transitions. [2023-08-26 18:38:20,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:20,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 695 transitions. [2023-08-26 18:38:20,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 86.875) internal successors, (695), 8 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:20,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 375.0) internal successors, (3375), 9 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:20,101 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 375.0) internal successors, (3375), 9 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:20,101 INFO L175 Difference]: Start difference. First operand has 66 places, 46 transitions, 305 flow. Second operand 8 states and 695 transitions. [2023-08-26 18:38:20,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 54 transitions, 439 flow [2023-08-26 18:38:20,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 54 transitions, 421 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 18:38:20,103 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 309 flow [2023-08-26 18:38:20,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=309, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2023-08-26 18:38:20,104 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2023-08-26 18:38:20,104 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 309 flow [2023-08-26 18:38:20,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 82.5) internal successors, (660), 8 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:20,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:20,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:20,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 18:38:20,105 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:20,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:20,105 INFO L85 PathProgramCache]: Analyzing trace with hash -521580782, now seen corresponding path program 1 times [2023-08-26 18:38:20,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:20,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832133860] [2023-08-26 18:38:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:20,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:20,842 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 18:38:20,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:20,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832133860] [2023-08-26 18:38:20,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832133860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:20,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:20,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 18:38:20,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037588988] [2023-08-26 18:38:20,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:20,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:38:20,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:20,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:38:20,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:38:20,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 375 [2023-08-26 18:38:20,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 309 flow. Second operand has 8 states, 8 states have (on average 90.625) internal successors, (725), 8 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:20,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:20,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 375 [2023-08-26 18:38:20,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:21,351 INFO L124 PetriNetUnfolderBase]: 53/165 cut-off events. [2023-08-26 18:38:21,351 INFO L125 PetriNetUnfolderBase]: For 291/291 co-relation queries the response was YES. [2023-08-26 18:38:21,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 165 events. 53/165 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 669 event pairs, 11 based on Foata normal form. 3/165 useless extension candidates. Maximal degree in co-relation 669. Up to 53 conditions per place. [2023-08-26 18:38:21,353 INFO L140 encePairwiseOnDemand]: 367/375 looper letters, 44 selfloop transitions, 17 changer transitions 2/64 dead transitions. [2023-08-26 18:38:21,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 64 transitions, 502 flow [2023-08-26 18:38:21,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 18:38:21,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 18:38:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 763 transitions. [2023-08-26 18:38:21,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25433333333333336 [2023-08-26 18:38:21,356 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 763 transitions. [2023-08-26 18:38:21,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 763 transitions. [2023-08-26 18:38:21,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:21,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 763 transitions. [2023-08-26 18:38:21,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.375) internal successors, (763), 8 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:21,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 375.0) internal successors, (3375), 9 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:21,362 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 375.0) internal successors, (3375), 9 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:21,362 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 309 flow. Second operand 8 states and 763 transitions. [2023-08-26 18:38:21,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 64 transitions, 502 flow [2023-08-26 18:38:21,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 463 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-26 18:38:21,365 INFO L231 Difference]: Finished difference. Result has 67 places, 45 transitions, 314 flow [2023-08-26 18:38:21,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=67, PETRI_TRANSITIONS=45} [2023-08-26 18:38:21,365 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2023-08-26 18:38:21,365 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 45 transitions, 314 flow [2023-08-26 18:38:21,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 90.625) internal successors, (725), 8 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:21,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:21,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:21,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 18:38:21,366 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:21,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:21,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1251579537, now seen corresponding path program 1 times [2023-08-26 18:38:21,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:21,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557175359] [2023-08-26 18:38:21,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:21,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:22,402 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 18:38:22,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:22,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557175359] [2023-08-26 18:38:22,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557175359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:22,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:22,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:38:22,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220309403] [2023-08-26 18:38:22,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:22,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:38:22,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:22,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:38:22,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:38:22,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 375 [2023-08-26 18:38:22,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 45 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 92.85714285714286) internal successors, (650), 7 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:22,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:22,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 375 [2023-08-26 18:38:22,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:22,736 INFO L124 PetriNetUnfolderBase]: 52/161 cut-off events. [2023-08-26 18:38:22,736 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2023-08-26 18:38:22,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 161 events. 52/161 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 647 event pairs, 13 based on Foata normal form. 3/163 useless extension candidates. Maximal degree in co-relation 667. Up to 65 conditions per place. [2023-08-26 18:38:22,737 INFO L140 encePairwiseOnDemand]: 369/375 looper letters, 42 selfloop transitions, 12 changer transitions 2/57 dead transitions. [2023-08-26 18:38:22,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 468 flow [2023-08-26 18:38:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:38:22,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:38:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 587 transitions. [2023-08-26 18:38:22,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2608888888888889 [2023-08-26 18:38:22,740 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 587 transitions. [2023-08-26 18:38:22,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 587 transitions. [2023-08-26 18:38:22,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:22,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 587 transitions. [2023-08-26 18:38:22,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.83333333333333) internal successors, (587), 6 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:22,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:22,744 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:22,744 INFO L175 Difference]: Start difference. First operand has 67 places, 45 transitions, 314 flow. Second operand 6 states and 587 transitions. [2023-08-26 18:38:22,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 468 flow [2023-08-26 18:38:22,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 432 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-26 18:38:22,747 INFO L231 Difference]: Finished difference. Result has 64 places, 44 transitions, 296 flow [2023-08-26 18:38:22,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=64, PETRI_TRANSITIONS=44} [2023-08-26 18:38:22,747 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-08-26 18:38:22,748 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 44 transitions, 296 flow [2023-08-26 18:38:22,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 92.85714285714286) internal successors, (650), 7 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:22,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:22,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:22,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 18:38:22,748 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:22,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:22,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1538111988, now seen corresponding path program 1 times [2023-08-26 18:38:22,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:22,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079249897] [2023-08-26 18:38:22,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:22,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:22,845 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 18:38:22,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:22,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079249897] [2023-08-26 18:38:22,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079249897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:22,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:22,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:38:22,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369070856] [2023-08-26 18:38:22,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:22,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:38:22,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:22,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:38:22,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:38:22,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 375 [2023-08-26 18:38:22,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 44 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:22,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:22,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 375 [2023-08-26 18:38:22,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:22,981 INFO L124 PetriNetUnfolderBase]: 52/159 cut-off events. [2023-08-26 18:38:22,981 INFO L125 PetriNetUnfolderBase]: For 323/323 co-relation queries the response was YES. [2023-08-26 18:38:22,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 159 events. 52/159 cut-off events. For 323/323 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 623 event pairs, 31 based on Foata normal form. 2/160 useless extension candidates. Maximal degree in co-relation 639. Up to 120 conditions per place. [2023-08-26 18:38:22,982 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 41 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2023-08-26 18:38:22,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 47 transitions, 398 flow [2023-08-26 18:38:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:38:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:38:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 423 transitions. [2023-08-26 18:38:22,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.282 [2023-08-26 18:38:22,984 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 423 transitions. [2023-08-26 18:38:22,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 423 transitions. [2023-08-26 18:38:22,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:22,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 423 transitions. [2023-08-26 18:38:22,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:22,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:22,988 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:22,988 INFO L175 Difference]: Start difference. First operand has 64 places, 44 transitions, 296 flow. Second operand 4 states and 423 transitions. [2023-08-26 18:38:22,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 47 transitions, 398 flow [2023-08-26 18:38:22,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 47 transitions, 375 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 18:38:22,991 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 279 flow [2023-08-26 18:38:22,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=279, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2023-08-26 18:38:22,991 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -4 predicate places. [2023-08-26 18:38:22,992 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 279 flow [2023-08-26 18:38:22,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:22,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:22,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:22,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 18:38:22,992 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:22,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:22,993 INFO L85 PathProgramCache]: Analyzing trace with hash -116377773, now seen corresponding path program 1 times [2023-08-26 18:38:22,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:22,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107132367] [2023-08-26 18:38:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:22,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:23,116 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 18:38:23,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:23,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107132367] [2023-08-26 18:38:23,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107132367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:23,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:23,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:38:23,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848076155] [2023-08-26 18:38:23,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:23,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:38:23,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:23,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:38:23,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:38:23,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 375 [2023-08-26 18:38:23,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 279 flow. Second operand has 5 states, 5 states have (on average 140.8) internal successors, (704), 5 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:23,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:23,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 375 [2023-08-26 18:38:23,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:23,284 INFO L124 PetriNetUnfolderBase]: 36/139 cut-off events. [2023-08-26 18:38:23,284 INFO L125 PetriNetUnfolderBase]: For 268/269 co-relation queries the response was YES. [2023-08-26 18:38:23,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 139 events. 36/139 cut-off events. For 268/269 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 554 event pairs, 5 based on Foata normal form. 5/144 useless extension candidates. Maximal degree in co-relation 541. Up to 67 conditions per place. [2023-08-26 18:38:23,286 INFO L140 encePairwiseOnDemand]: 370/375 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2023-08-26 18:38:23,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 433 flow [2023-08-26 18:38:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:38:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:38:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 583 transitions. [2023-08-26 18:38:23,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38866666666666666 [2023-08-26 18:38:23,294 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 583 transitions. [2023-08-26 18:38:23,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 583 transitions. [2023-08-26 18:38:23,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:23,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 583 transitions. [2023-08-26 18:38:23,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:23,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:23,298 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:23,298 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 279 flow. Second operand 4 states and 583 transitions. [2023-08-26 18:38:23,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 433 flow [2023-08-26 18:38:23,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 53 transitions, 424 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 18:38:23,302 INFO L231 Difference]: Finished difference. Result has 63 places, 43 transitions, 285 flow [2023-08-26 18:38:23,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=63, PETRI_TRANSITIONS=43} [2023-08-26 18:38:23,303 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2023-08-26 18:38:23,303 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 43 transitions, 285 flow [2023-08-26 18:38:23,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.8) internal successors, (704), 5 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:23,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:23,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:23,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 18:38:23,304 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:23,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:23,304 INFO L85 PathProgramCache]: Analyzing trace with hash -593432874, now seen corresponding path program 1 times [2023-08-26 18:38:23,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:23,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950859965] [2023-08-26 18:38:23,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:23,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:23,930 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 18:38:23,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:23,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950859965] [2023-08-26 18:38:23,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950859965] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:23,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:23,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 18:38:23,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427166657] [2023-08-26 18:38:23,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:23,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 18:38:23,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:23,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 18:38:23,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-26 18:38:23,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 375 [2023-08-26 18:38:23,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 43 transitions, 285 flow. Second operand has 9 states, 9 states have (on average 79.88888888888889) internal successors, (719), 9 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:23,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:23,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 375 [2023-08-26 18:38:23,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:24,337 INFO L124 PetriNetUnfolderBase]: 41/139 cut-off events. [2023-08-26 18:38:24,337 INFO L125 PetriNetUnfolderBase]: For 232/232 co-relation queries the response was YES. [2023-08-26 18:38:24,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 139 events. 41/139 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 511 event pairs, 3 based on Foata normal form. 2/140 useless extension candidates. Maximal degree in co-relation 584. Up to 60 conditions per place. [2023-08-26 18:38:24,338 INFO L140 encePairwiseOnDemand]: 366/375 looper letters, 48 selfloop transitions, 14 changer transitions 3/66 dead transitions. [2023-08-26 18:38:24,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 521 flow [2023-08-26 18:38:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 18:38:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 18:38:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 758 transitions. [2023-08-26 18:38:24,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2245925925925926 [2023-08-26 18:38:24,342 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 758 transitions. [2023-08-26 18:38:24,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 758 transitions. [2023-08-26 18:38:24,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:24,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 758 transitions. [2023-08-26 18:38:24,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 84.22222222222223) internal successors, (758), 9 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:24,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:24,348 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:24,348 INFO L175 Difference]: Start difference. First operand has 63 places, 43 transitions, 285 flow. Second operand 9 states and 758 transitions. [2023-08-26 18:38:24,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 521 flow [2023-08-26 18:38:24,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 509 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:38:24,351 INFO L231 Difference]: Finished difference. Result has 69 places, 43 transitions, 315 flow [2023-08-26 18:38:24,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=315, PETRI_PLACES=69, PETRI_TRANSITIONS=43} [2023-08-26 18:38:24,351 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-08-26 18:38:24,351 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 43 transitions, 315 flow [2023-08-26 18:38:24,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 79.88888888888889) internal successors, (719), 9 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:24,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:24,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:24,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 18:38:24,352 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:24,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:24,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1647068576, now seen corresponding path program 2 times [2023-08-26 18:38:24,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:24,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857791947] [2023-08-26 18:38:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:24,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:24,995 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 18:38:24,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:24,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857791947] [2023-08-26 18:38:24,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857791947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:24,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:24,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 18:38:24,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294587723] [2023-08-26 18:38:24,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:24,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 18:38:24,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:24,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 18:38:24,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 18:38:24,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 375 [2023-08-26 18:38:24,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 43 transitions, 315 flow. Second operand has 9 states, 9 states have (on average 79.88888888888889) internal successors, (719), 9 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:24,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:24,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 375 [2023-08-26 18:38:24,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:25,418 INFO L124 PetriNetUnfolderBase]: 41/136 cut-off events. [2023-08-26 18:38:25,418 INFO L125 PetriNetUnfolderBase]: For 316/316 co-relation queries the response was YES. [2023-08-26 18:38:25,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 136 events. 41/136 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 493 event pairs, 3 based on Foata normal form. 1/136 useless extension candidates. Maximal degree in co-relation 596. Up to 37 conditions per place. [2023-08-26 18:38:25,419 INFO L140 encePairwiseOnDemand]: 367/375 looper letters, 41 selfloop transitions, 14 changer transitions 12/68 dead transitions. [2023-08-26 18:38:25,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 68 transitions, 545 flow [2023-08-26 18:38:25,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 18:38:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 18:38:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 837 transitions. [2023-08-26 18:38:25,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2232 [2023-08-26 18:38:25,422 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 837 transitions. [2023-08-26 18:38:25,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 837 transitions. [2023-08-26 18:38:25,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:25,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 837 transitions. [2023-08-26 18:38:25,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 83.7) internal successors, (837), 10 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:25,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 375.0) internal successors, (4125), 11 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:25,427 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 375.0) internal successors, (4125), 11 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:25,428 INFO L175 Difference]: Start difference. First operand has 69 places, 43 transitions, 315 flow. Second operand 10 states and 837 transitions. [2023-08-26 18:38:25,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 68 transitions, 545 flow [2023-08-26 18:38:25,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 68 transitions, 529 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-26 18:38:25,430 INFO L231 Difference]: Finished difference. Result has 73 places, 39 transitions, 295 flow [2023-08-26 18:38:25,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=295, PETRI_PLACES=73, PETRI_TRANSITIONS=39} [2023-08-26 18:38:25,431 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2023-08-26 18:38:25,431 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 39 transitions, 295 flow [2023-08-26 18:38:25,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 79.88888888888889) internal successors, (719), 9 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:25,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:25,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:25,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 18:38:25,432 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:25,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:25,432 INFO L85 PathProgramCache]: Analyzing trace with hash 371511957, now seen corresponding path program 1 times [2023-08-26 18:38:25,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:25,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384453505] [2023-08-26 18:38:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:25,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:25,907 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 18:38:25,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:25,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384453505] [2023-08-26 18:38:25,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384453505] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:25,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:25,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 18:38:25,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375959623] [2023-08-26 18:38:25,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:25,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:38:25,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:25,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:38:25,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:38:25,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 375 [2023-08-26 18:38:25,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 39 transitions, 295 flow. Second operand has 8 states, 8 states have (on average 91.125) internal successors, (729), 8 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:25,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:25,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 375 [2023-08-26 18:38:25,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:26,237 INFO L124 PetriNetUnfolderBase]: 32/110 cut-off events. [2023-08-26 18:38:26,237 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2023-08-26 18:38:26,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 110 events. 32/110 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 372 event pairs, 11 based on Foata normal form. 1/110 useless extension candidates. Maximal degree in co-relation 478. Up to 39 conditions per place. [2023-08-26 18:38:26,238 INFO L140 encePairwiseOnDemand]: 368/375 looper letters, 34 selfloop transitions, 14 changer transitions 0/49 dead transitions. [2023-08-26 18:38:26,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 49 transitions, 425 flow [2023-08-26 18:38:26,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 18:38:26,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 18:38:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 930 transitions. [2023-08-26 18:38:26,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.248 [2023-08-26 18:38:26,240 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 930 transitions. [2023-08-26 18:38:26,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 930 transitions. [2023-08-26 18:38:26,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:26,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 930 transitions. [2023-08-26 18:38:26,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 93.0) internal successors, (930), 10 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:26,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 375.0) internal successors, (4125), 11 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:26,246 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 375.0) internal successors, (4125), 11 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:26,246 INFO L175 Difference]: Start difference. First operand has 73 places, 39 transitions, 295 flow. Second operand 10 states and 930 transitions. [2023-08-26 18:38:26,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 49 transitions, 425 flow [2023-08-26 18:38:26,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 49 transitions, 365 flow, removed 1 selfloop flow, removed 13 redundant places. [2023-08-26 18:38:26,249 INFO L231 Difference]: Finished difference. Result has 67 places, 38 transitions, 257 flow [2023-08-26 18:38:26,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=257, PETRI_PLACES=67, PETRI_TRANSITIONS=38} [2023-08-26 18:38:26,249 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2023-08-26 18:38:26,249 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 38 transitions, 257 flow [2023-08-26 18:38:26,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 91.125) internal successors, (729), 8 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:26,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:26,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:26,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 18:38:26,250 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:26,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:26,250 INFO L85 PathProgramCache]: Analyzing trace with hash 371511956, now seen corresponding path program 1 times [2023-08-26 18:38:26,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:26,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950548863] [2023-08-26 18:38:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:26,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:26,958 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 18:38:26,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:26,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950548863] [2023-08-26 18:38:26,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950548863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:26,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:26,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 18:38:26,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725588467] [2023-08-26 18:38:26,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:26,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:38:26,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:26,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:38:26,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:38:26,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 375 [2023-08-26 18:38:26,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 38 transitions, 257 flow. Second operand has 8 states, 8 states have (on average 93.125) internal successors, (745), 8 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:26,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:26,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 375 [2023-08-26 18:38:26,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:27,481 INFO L124 PetriNetUnfolderBase]: 32/109 cut-off events. [2023-08-26 18:38:27,481 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2023-08-26 18:38:27,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 109 events. 32/109 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 375 event pairs, 12 based on Foata normal form. 1/109 useless extension candidates. Maximal degree in co-relation 437. Up to 45 conditions per place. [2023-08-26 18:38:27,482 INFO L140 encePairwiseOnDemand]: 369/375 looper letters, 20 selfloop transitions, 7 changer transitions 17/45 dead transitions. [2023-08-26 18:38:27,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 45 transitions, 368 flow [2023-08-26 18:38:27,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:38:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:38:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 578 transitions. [2023-08-26 18:38:27,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2568888888888889 [2023-08-26 18:38:27,483 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 578 transitions. [2023-08-26 18:38:27,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 578 transitions. [2023-08-26 18:38:27,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:27,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 578 transitions. [2023-08-26 18:38:27,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.33333333333333) internal successors, (578), 6 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:27,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:27,487 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:27,487 INFO L175 Difference]: Start difference. First operand has 67 places, 38 transitions, 257 flow. Second operand 6 states and 578 transitions. [2023-08-26 18:38:27,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 45 transitions, 368 flow [2023-08-26 18:38:27,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 45 transitions, 330 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-26 18:38:27,489 INFO L231 Difference]: Finished difference. Result has 61 places, 27 transitions, 172 flow [2023-08-26 18:38:27,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=61, PETRI_TRANSITIONS=27} [2023-08-26 18:38:27,490 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -5 predicate places. [2023-08-26 18:38:27,490 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 27 transitions, 172 flow [2023-08-26 18:38:27,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 93.125) internal successors, (745), 8 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:27,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:27,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:27,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-26 18:38:27,491 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:27,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:27,491 INFO L85 PathProgramCache]: Analyzing trace with hash 358477926, now seen corresponding path program 3 times [2023-08-26 18:38:27,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:27,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622289880] [2023-08-26 18:38:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:27,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:28,104 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 18:38:28,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:28,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622289880] [2023-08-26 18:38:28,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622289880] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:28,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:28,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 18:38:28,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294273288] [2023-08-26 18:38:28,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:28,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 18:38:28,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 18:38:28,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-26 18:38:28,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 375 [2023-08-26 18:38:28,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 27 transitions, 172 flow. Second operand has 9 states, 9 states have (on average 79.88888888888889) internal successors, (719), 9 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:28,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:28,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 375 [2023-08-26 18:38:28,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:28,478 INFO L124 PetriNetUnfolderBase]: 10/56 cut-off events. [2023-08-26 18:38:28,478 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-08-26 18:38:28,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 56 events. 10/56 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 1/56 useless extension candidates. Maximal degree in co-relation 249. Up to 15 conditions per place. [2023-08-26 18:38:28,479 INFO L140 encePairwiseOnDemand]: 367/375 looper letters, 16 selfloop transitions, 5 changer transitions 14/36 dead transitions. [2023-08-26 18:38:28,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 36 transitions, 286 flow [2023-08-26 18:38:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 18:38:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 18:38:28,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 734 transitions. [2023-08-26 18:38:28,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21748148148148147 [2023-08-26 18:38:28,481 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 734 transitions. [2023-08-26 18:38:28,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 734 transitions. [2023-08-26 18:38:28,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:28,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 734 transitions. [2023-08-26 18:38:28,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.55555555555556) internal successors, (734), 9 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 18:38:28,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:28,486 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:28,486 INFO L175 Difference]: Start difference. First operand has 61 places, 27 transitions, 172 flow. Second operand 9 states and 734 transitions. [2023-08-26 18:38:28,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 36 transitions, 286 flow [2023-08-26 18:38:28,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 36 transitions, 235 flow, removed 1 selfloop flow, removed 13 redundant places. [2023-08-26 18:38:28,487 INFO L231 Difference]: Finished difference. Result has 52 places, 20 transitions, 104 flow [2023-08-26 18:38:28,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=104, PETRI_PLACES=52, PETRI_TRANSITIONS=20} [2023-08-26 18:38:28,488 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -14 predicate places. [2023-08-26 18:38:28,488 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 20 transitions, 104 flow [2023-08-26 18:38:28,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 79.88888888888889) internal successors, (719), 9 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:28,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:38:28,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:28,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 18:38:28,489 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 18:38:28,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:38:28,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1892073950, now seen corresponding path program 4 times [2023-08-26 18:38:28,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:38:28,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563119367] [2023-08-26 18:38:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:38:28,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:38:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:38:29,053 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 18:38:29,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:38:29,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563119367] [2023-08-26 18:38:29,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563119367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:38:29,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:38:29,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 18:38:29,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502905148] [2023-08-26 18:38:29,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:38:29,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 18:38:29,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:38:29,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 18:38:29,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-26 18:38:29,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 375 [2023-08-26 18:38:29,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 20 transitions, 104 flow. Second operand has 11 states, 11 states have (on average 79.54545454545455) internal successors, (875), 11 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:29,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:38:29,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 375 [2023-08-26 18:38:29,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:38:29,516 INFO L124 PetriNetUnfolderBase]: 3/29 cut-off events. [2023-08-26 18:38:29,516 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-08-26 18:38:29,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 29 events. 3/29 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 118. Up to 7 conditions per place. [2023-08-26 18:38:29,516 INFO L140 encePairwiseOnDemand]: 366/375 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2023-08-26 18:38:29,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 21 transitions, 148 flow [2023-08-26 18:38:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 18:38:29,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 18:38:29,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 721 transitions. [2023-08-26 18:38:29,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21362962962962964 [2023-08-26 18:38:29,518 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 721 transitions. [2023-08-26 18:38:29,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 721 transitions. [2023-08-26 18:38:29,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:38:29,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 721 transitions. [2023-08-26 18:38:29,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.11111111111111) internal successors, (721), 9 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:29,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:29,521 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:29,521 INFO L175 Difference]: Start difference. First operand has 52 places, 20 transitions, 104 flow. Second operand 9 states and 721 transitions. [2023-08-26 18:38:29,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 21 transitions, 148 flow [2023-08-26 18:38:29,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 21 transitions, 110 flow, removed 1 selfloop flow, removed 14 redundant places. [2023-08-26 18:38:29,522 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-26 18:38:29,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-26 18:38:29,522 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -27 predicate places. [2023-08-26 18:38:29,522 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-26 18:38:29,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 79.54545454545455) internal successors, (875), 11 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:38:29,525 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 55 remaining) [2023-08-26 18:38:29,528 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 55 remaining) [2023-08-26 18:38:29,529 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 55 remaining) [2023-08-26 18:38:29,529 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 55 remaining) [2023-08-26 18:38:29,529 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 55 remaining) [2023-08-26 18:38:29,529 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 55 remaining) [2023-08-26 18:38:29,529 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 55 remaining) [2023-08-26 18:38:29,529 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 55 remaining) [2023-08-26 18:38:29,529 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 55 remaining) [2023-08-26 18:38:29,529 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 55 remaining) [2023-08-26 18:38:29,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 55 remaining) [2023-08-26 18:38:29,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 55 remaining) [2023-08-26 18:38:29,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 55 remaining) [2023-08-26 18:38:29,531 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 55 remaining) [2023-08-26 18:38:29,531 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 55 remaining) [2023-08-26 18:38:29,531 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 55 remaining) [2023-08-26 18:38:29,531 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 55 remaining) [2023-08-26 18:38:29,531 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 55 remaining) [2023-08-26 18:38:29,531 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 55 remaining) [2023-08-26 18:38:29,532 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 55 remaining) [2023-08-26 18:38:29,532 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 55 remaining) [2023-08-26 18:38:29,532 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 55 remaining) [2023-08-26 18:38:29,532 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 55 remaining) [2023-08-26 18:38:29,532 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 55 remaining) [2023-08-26 18:38:29,532 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 55 remaining) [2023-08-26 18:38:29,532 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 55 remaining) [2023-08-26 18:38:29,532 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 55 remaining) [2023-08-26 18:38:29,532 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 55 remaining) [2023-08-26 18:38:29,533 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 55 remaining) [2023-08-26 18:38:29,533 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 55 remaining) [2023-08-26 18:38:29,533 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 55 remaining) [2023-08-26 18:38:29,533 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 55 remaining) [2023-08-26 18:38:29,533 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 55 remaining) [2023-08-26 18:38:29,533 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 55 remaining) [2023-08-26 18:38:29,533 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 55 remaining) [2023-08-26 18:38:29,533 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 55 remaining) [2023-08-26 18:38:29,533 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 55 remaining) [2023-08-26 18:38:29,534 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 55 remaining) [2023-08-26 18:38:29,534 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 55 remaining) [2023-08-26 18:38:29,534 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 55 remaining) [2023-08-26 18:38:29,534 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 55 remaining) [2023-08-26 18:38:29,534 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 55 remaining) [2023-08-26 18:38:29,534 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 55 remaining) [2023-08-26 18:38:29,534 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 55 remaining) [2023-08-26 18:38:29,534 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 55 remaining) [2023-08-26 18:38:29,534 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 55 remaining) [2023-08-26 18:38:29,534 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 55 remaining) [2023-08-26 18:38:29,535 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 55 remaining) [2023-08-26 18:38:29,535 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 55 remaining) [2023-08-26 18:38:29,535 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 55 remaining) [2023-08-26 18:38:29,535 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 55 remaining) [2023-08-26 18:38:29,535 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 55 remaining) [2023-08-26 18:38:29,535 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 55 remaining) [2023-08-26 18:38:29,535 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 55 remaining) [2023-08-26 18:38:29,535 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 55 remaining) [2023-08-26 18:38:29,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 18:38:29,536 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:38:29,541 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:38:29,541 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:38:29,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:38:29 BasicIcfg [2023-08-26 18:38:29,544 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:38:29,544 INFO L158 Benchmark]: Toolchain (without parser) took 175191.58ms. Allocated memory was 350.2MB in the beginning and 610.3MB in the end (delta: 260.0MB). Free memory was 323.6MB in the beginning and 311.0MB in the end (delta: 12.6MB). Peak memory consumption was 274.8MB. Max. memory is 16.0GB. [2023-08-26 18:38:29,544 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 350.2MB. Free memory is still 326.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:38:29,545 INFO L158 Benchmark]: CACSL2BoogieTranslator took 708.66ms. Allocated memory is still 350.2MB. Free memory was 323.2MB in the beginning and 285.0MB in the end (delta: 38.1MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. [2023-08-26 18:38:29,545 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.98ms. Allocated memory is still 350.2MB. Free memory was 284.6MB in the beginning and 282.1MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:38:29,545 INFO L158 Benchmark]: Boogie Preprocessor took 47.04ms. Allocated memory is still 350.2MB. Free memory was 282.1MB in the beginning and 280.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:38:29,545 INFO L158 Benchmark]: RCFGBuilder took 504.80ms. Allocated memory is still 350.2MB. Free memory was 280.1MB in the beginning and 307.8MB in the end (delta: -27.8MB). Peak memory consumption was 9.4MB. Max. memory is 16.0GB. [2023-08-26 18:38:29,545 INFO L158 Benchmark]: TraceAbstraction took 173854.27ms. Allocated memory was 350.2MB in the beginning and 610.3MB in the end (delta: 260.0MB). Free memory was 306.8MB in the beginning and 311.0MB in the end (delta: -4.2MB). Peak memory consumption was 254.8MB. Max. memory is 16.0GB. [2023-08-26 18:38:29,550 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 350.2MB. Free memory is still 326.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 708.66ms. Allocated memory is still 350.2MB. Free memory was 323.2MB in the beginning and 285.0MB in the end (delta: 38.1MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 69.98ms. Allocated memory is still 350.2MB. Free memory was 284.6MB in the beginning and 282.1MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 47.04ms. Allocated memory is still 350.2MB. Free memory was 282.1MB in the beginning and 280.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 504.80ms. Allocated memory is still 350.2MB. Free memory was 280.1MB in the beginning and 307.8MB in the end (delta: -27.8MB). Peak memory consumption was 9.4MB. Max. memory is 16.0GB. * TraceAbstraction took 173854.27ms. Allocated memory was 350.2MB in the beginning and 610.3MB in the end (delta: 260.0MB). Free memory was 306.8MB in the beginning and 311.0MB in the end (delta: -4.2MB). Peak memory consumption was 254.8MB. 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: 150.4s, 162 PlacesBefore, 66 PlacesAfterwards, 158 TransitionsBefore, 62 TransitionsAfterwards, 2310 CoEnabledTransitionPairs, 9 FixpointIterations, 158 TrivialSequentialCompositions, 58 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 216 TotalNumberOfCompositions, 12363 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5854, independent: 5299, independent conditional: 0, independent unconditional: 5299, dependent: 555, dependent conditional: 0, dependent unconditional: 555, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1370, independent: 1308, independent conditional: 0, independent unconditional: 1308, dependent: 62, dependent conditional: 0, dependent unconditional: 62, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5854, independent: 3991, independent conditional: 0, independent unconditional: 3991, dependent: 493, dependent conditional: 0, dependent unconditional: 493, unknown: 1370, unknown conditional: 0, unknown unconditional: 1370] , Statistics on independence cache: Total cache size (in pairs): 214, Positive cache size: 183, Positive conditional cache size: 0, Positive unconditional cache size: 183, Negative cache size: 31, Negative conditional cache size: 0, Negative unconditional cache size: 31, 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 - 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, 197 locations, 55 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: 173.7s, OverallIterations: 28, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 8.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 150.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 829 SdHoareTripleChecker+Valid, 6.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 829 mSDsluCounter, 62 SdHoareTripleChecker+Invalid, 6.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 13 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2407 IncrementalHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 49 mSDtfsCounter, 2407 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=315occurred in iteration=23, InterpolantAutomatonStates: 150, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 13.0s InterpolantComputationTime, 301 NumberOfCodeBlocks, 301 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 273 ConstructedInterpolants, 0 QuantifiedInterpolants, 6212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 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 42 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 18:38:29,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...