/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/09-regions_02-list_nr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:30:47,235 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:30:47,324 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 15:30:47,329 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:30:47,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:30:47,362 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:30:47,362 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:30:47,367 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:30:47,368 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:30:47,371 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:30:47,371 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:30:47,372 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:30:47,372 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:30:47,373 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:30:47,373 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:30:47,373 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:30:47,374 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:30:47,374 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:30:47,374 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:30:47,374 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:30:47,375 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:30:47,375 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:30:47,375 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:30:47,376 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:30:47,376 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:30:47,376 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:30:47,376 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:30:47,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:30:47,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:30:47,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:30:47,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:30:47,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:30:47,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:30:47,379 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:30:47,379 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:30:47,379 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:30:47,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:30:47,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:30:47,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:30:47,731 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:30:47,733 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:30:47,734 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_02-list_nr.i [2023-08-26 15:30:48,976 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:30:49,244 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:30:49,244 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_02-list_nr.i [2023-08-26 15:30:49,275 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9766e4f47/59c2752eecda424e9203a5908192e7c9/FLAG980ac8648 [2023-08-26 15:30:49,287 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9766e4f47/59c2752eecda424e9203a5908192e7c9 [2023-08-26 15:30:49,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:30:49,290 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:30:49,291 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:30:49,291 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:30:49,293 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:30:49,294 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:30:49" (1/1) ... [2023-08-26 15:30:49,295 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7032a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:49, skipping insertion in model container [2023-08-26 15:30:49,295 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:30:49" (1/1) ... [2023-08-26 15:30:49,342 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:30:49,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:30:49,866 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:30:49,893 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:30:49,895 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:30:49,910 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [1044] [2023-08-26 15:30:49,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:30:50,007 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:30:50,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:50 WrapperNode [2023-08-26 15:30:50,008 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:30:50,009 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:30:50,009 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:30:50,009 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:30:50,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:50" (1/1) ... [2023-08-26 15:30:50,038 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:50" (1/1) ... [2023-08-26 15:30:50,057 INFO L138 Inliner]: procedures = 368, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 80 [2023-08-26 15:30:50,058 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:30:50,058 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:30:50,058 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:30:50,058 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:30:50,066 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:50" (1/1) ... [2023-08-26 15:30:50,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:50" (1/1) ... [2023-08-26 15:30:50,072 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:50" (1/1) ... [2023-08-26 15:30:50,072 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:50" (1/1) ... [2023-08-26 15:30:50,080 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:50" (1/1) ... [2023-08-26 15:30:50,082 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:50" (1/1) ... [2023-08-26 15:30:50,083 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:50" (1/1) ... [2023-08-26 15:30:50,084 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:50" (1/1) ... [2023-08-26 15:30:50,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:30:50,088 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:30:50,088 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:30:50,088 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:30:50,089 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:50" (1/1) ... [2023-08-26 15:30:50,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:30:50,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:50,138 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 15:30:50,163 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 15:30:50,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:30:50,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-26 15:30:50,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:30:50,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:30:50,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:30:50,180 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:30:50,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-26 15:30:50,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:30:50,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-26 15:30:50,180 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:30:50,181 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:30:50,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:30:50,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:30:50,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:30:50,183 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 15:30:50,309 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:30:50,310 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:30:50,526 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:30:50,532 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:30:50,532 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 15:30:50,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:30:50 BoogieIcfgContainer [2023-08-26 15:30:50,534 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:30:50,536 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:30:50,536 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:30:50,538 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:30:50,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:30:49" (1/3) ... [2023-08-26 15:30:50,539 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3816d3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:30:50, skipping insertion in model container [2023-08-26 15:30:50,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:50" (2/3) ... [2023-08-26 15:30:50,539 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3816d3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:30:50, skipping insertion in model container [2023-08-26 15:30:50,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:30:50" (3/3) ... [2023-08-26 15:30:50,540 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_02-list_nr.i [2023-08-26 15:30:50,554 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:30:50,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-26 15:30:50,555 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:30:50,626 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:30:50,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 113 transitions, 231 flow [2023-08-26 15:30:50,707 INFO L124 PetriNetUnfolderBase]: 0/112 cut-off events. [2023-08-26 15:30:50,707 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:50,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 112 events. 0/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 131 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-08-26 15:30:50,713 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 113 transitions, 231 flow [2023-08-26 15:30:50,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 112 transitions, 227 flow [2023-08-26 15:30:50,721 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:30:50,735 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 112 transitions, 227 flow [2023-08-26 15:30:50,743 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 112 transitions, 227 flow [2023-08-26 15:30:50,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 112 transitions, 227 flow [2023-08-26 15:30:50,775 INFO L124 PetriNetUnfolderBase]: 0/112 cut-off events. [2023-08-26 15:30:50,776 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:50,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 112 events. 0/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 131 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-08-26 15:30:50,779 INFO L119 LiptonReduction]: Number of co-enabled transitions 1280 [2023-08-26 15:31:16,175 WARN L234 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 226 DAG size of output: 217 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-26 15:31:18,727 INFO L134 LiptonReduction]: Checked pairs total: 4946 [2023-08-26 15:31:18,727 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-26 15:31:18,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:31:18,742 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;@6b55573, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:31:18,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-08-26 15:31:18,744 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:31:18,744 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 15:31:18,744 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:31:18,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:18,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 15:31:18,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:18,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:18,749 INFO L85 PathProgramCache]: Analyzing trace with hash 404, now seen corresponding path program 1 times [2023-08-26 15:31:18,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:18,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720250302] [2023-08-26 15:31:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:18,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:18,855 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 15:31:18,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:18,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720250302] [2023-08-26 15:31:18,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720250302] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:18,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:18,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 15:31:18,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560451921] [2023-08-26 15:31:18,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:18,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:31:18,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:18,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:31:18,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:31:18,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 234 [2023-08-26 15:31:18,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 85 flow. Second operand has 2 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:18,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:18,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 234 [2023-08-26 15:31:18,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:19,007 INFO L124 PetriNetUnfolderBase]: 84/217 cut-off events. [2023-08-26 15:31:19,007 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:31:19,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 217 events. 84/217 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 923 event pairs, 84 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 402. Up to 190 conditions per place. [2023-08-26 15:31:19,013 INFO L140 encePairwiseOnDemand]: 220/234 looper letters, 21 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-08-26 15:31:19,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 99 flow [2023-08-26 15:31:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:31:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:31:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 259 transitions. [2023-08-26 15:31:19,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534188034188035 [2023-08-26 15:31:19,032 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 259 transitions. [2023-08-26 15:31:19,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 259 transitions. [2023-08-26 15:31:19,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:19,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 259 transitions. [2023-08-26 15:31:19,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.5) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,045 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,046 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 85 flow. Second operand 2 states and 259 transitions. [2023-08-26 15:31:19,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 99 flow [2023-08-26 15:31:19,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:31:19,050 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 56 flow [2023-08-26 15:31:19,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-26 15:31:19,054 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -14 predicate places. [2023-08-26 15:31:19,055 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 56 flow [2023-08-26 15:31:19,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:19,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 15:31:19,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:31:19,056 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:19,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:19,056 INFO L85 PathProgramCache]: Analyzing trace with hash 12416812, now seen corresponding path program 1 times [2023-08-26 15:31:19,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:19,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57885648] [2023-08-26 15:31:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:19,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:19,292 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 15:31:19,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:19,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57885648] [2023-08-26 15:31:19,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57885648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:19,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:19,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:31:19,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960918744] [2023-08-26 15:31:19,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:19,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:31:19,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:19,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:31:19,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:31:19,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 234 [2023-08-26 15:31:19,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:19,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 234 [2023-08-26 15:31:19,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:19,413 INFO L124 PetriNetUnfolderBase]: 111/255 cut-off events. [2023-08-26 15:31:19,413 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:31:19,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 255 events. 111/255 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1048 event pairs, 98 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 512. Up to 227 conditions per place. [2023-08-26 15:31:19,416 INFO L140 encePairwiseOnDemand]: 226/234 looper letters, 33 selfloop transitions, 5 changer transitions 2/40 dead transitions. [2023-08-26 15:31:19,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 162 flow [2023-08-26 15:31:19,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:31:19,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:31:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2023-08-26 15:31:19,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36894586894586895 [2023-08-26 15:31:19,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2023-08-26 15:31:19,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2023-08-26 15:31:19,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:19,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2023-08-26 15:31:19,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,424 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,424 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 56 flow. Second operand 3 states and 259 transitions. [2023-08-26 15:31:19,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 162 flow [2023-08-26 15:31:19,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:31:19,426 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 90 flow [2023-08-26 15:31:19,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-08-26 15:31:19,429 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -11 predicate places. [2023-08-26 15:31:19,429 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 90 flow [2023-08-26 15:31:19,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:19,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 15:31:19,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:31:19,431 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:19,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash 12416813, now seen corresponding path program 1 times [2023-08-26 15:31:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:19,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390674435] [2023-08-26 15:31:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:19,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:19,596 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 15:31:19,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:19,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390674435] [2023-08-26 15:31:19,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390674435] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:19,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:19,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:31:19,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689865639] [2023-08-26 15:31:19,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:19,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:31:19,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:19,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:31:19,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:31:19,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 234 [2023-08-26 15:31:19,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:19,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 234 [2023-08-26 15:31:19,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:19,659 INFO L124 PetriNetUnfolderBase]: 76/191 cut-off events. [2023-08-26 15:31:19,660 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 15:31:19,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 191 events. 76/191 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 754 event pairs, 74 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 430. Up to 180 conditions per place. [2023-08-26 15:31:19,661 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 24 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-26 15:31:19,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 27 transitions, 136 flow [2023-08-26 15:31:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:31:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:31:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2023-08-26 15:31:19,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3504273504273504 [2023-08-26 15:31:19,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions. [2023-08-26 15:31:19,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions. [2023-08-26 15:31:19,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:19,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions. [2023-08-26 15:31:19,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,666 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 90 flow. Second operand 3 states and 246 transitions. [2023-08-26 15:31:19,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 27 transitions, 136 flow [2023-08-26 15:31:19,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:31:19,668 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 78 flow [2023-08-26 15:31:19,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-26 15:31:19,668 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -13 predicate places. [2023-08-26 15:31:19,669 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 78 flow [2023-08-26 15:31:19,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:19,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 15:31:19,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:31:19,670 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:19,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:19,670 INFO L85 PathProgramCache]: Analyzing trace with hash 12417673, now seen corresponding path program 1 times [2023-08-26 15:31:19,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:19,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337325383] [2023-08-26 15:31:19,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:19,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:19,796 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 15:31:19,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:19,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337325383] [2023-08-26 15:31:19,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337325383] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:19,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:19,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:31:19,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32246008] [2023-08-26 15:31:19,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:19,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:31:19,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:19,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:31:19,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:31:19,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 234 [2023-08-26 15:31:19,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:19,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 234 [2023-08-26 15:31:19,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:19,870 INFO L124 PetriNetUnfolderBase]: 76/188 cut-off events. [2023-08-26 15:31:19,870 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 15:31:19,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 188 events. 76/188 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 763 event pairs, 2 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 411. Up to 170 conditions per place. [2023-08-26 15:31:19,872 INFO L140 encePairwiseOnDemand]: 232/234 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-26 15:31:19,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 154 flow [2023-08-26 15:31:19,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:31:19,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:31:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2023-08-26 15:31:19,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2023-08-26 15:31:19,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2023-08-26 15:31:19,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2023-08-26 15:31:19,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:19,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2023-08-26 15:31:19,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,876 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,876 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 78 flow. Second operand 3 states and 260 transitions. [2023-08-26 15:31:19,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 154 flow [2023-08-26 15:31:19,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:31:19,878 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 77 flow [2023-08-26 15:31:19,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-26 15:31:19,878 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -13 predicate places. [2023-08-26 15:31:19,879 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 77 flow [2023-08-26 15:31:19,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:19,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 15:31:19,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:31:19,879 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:19,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:19,880 INFO L85 PathProgramCache]: Analyzing trace with hash 12417653, now seen corresponding path program 1 times [2023-08-26 15:31:19,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:19,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569955155] [2023-08-26 15:31:19,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:19,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:19,940 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 15:31:19,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:19,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569955155] [2023-08-26 15:31:19,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569955155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:19,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:19,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:31:19,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401569926] [2023-08-26 15:31:19,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:19,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:31:19,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:19,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:31:19,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:31:19,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 234 [2023-08-26 15:31:19,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:19,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:19,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 234 [2023-08-26 15:31:19,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:20,050 INFO L124 PetriNetUnfolderBase]: 68/178 cut-off events. [2023-08-26 15:31:20,050 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-26 15:31:20,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 178 events. 68/178 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 717 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 411. Up to 143 conditions per place. [2023-08-26 15:31:20,052 INFO L140 encePairwiseOnDemand]: 228/234 looper letters, 37 selfloop transitions, 4 changer transitions 2/43 dead transitions. [2023-08-26 15:31:20,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 207 flow [2023-08-26 15:31:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:31:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:31:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-08-26 15:31:20,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3803418803418803 [2023-08-26 15:31:20,053 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-08-26 15:31:20,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-08-26 15:31:20,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:20,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-08-26 15:31:20,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:20,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:20,056 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:20,056 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 77 flow. Second operand 3 states and 267 transitions. [2023-08-26 15:31:20,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 207 flow [2023-08-26 15:31:20,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:31:20,058 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 110 flow [2023-08-26 15:31:20,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-26 15:31:20,058 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -10 predicate places. [2023-08-26 15:31:20,059 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 110 flow [2023-08-26 15:31:20,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:20,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:20,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 15:31:20,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:31:20,059 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:20,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:20,060 INFO L85 PathProgramCache]: Analyzing trace with hash 384926060, now seen corresponding path program 1 times [2023-08-26 15:31:20,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:20,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211833064] [2023-08-26 15:31:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:20,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:20,354 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 15:31:20,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:20,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211833064] [2023-08-26 15:31:20,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211833064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:20,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:20,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:31:20,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270505924] [2023-08-26 15:31:20,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:20,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:31:20,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:20,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:31:20,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:31:20,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 234 [2023-08-26 15:31:20,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:20,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:20,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 234 [2023-08-26 15:31:20,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:20,460 INFO L124 PetriNetUnfolderBase]: 82/208 cut-off events. [2023-08-26 15:31:20,460 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-26 15:31:20,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 208 events. 82/208 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 899 event pairs, 5 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 534. Up to 99 conditions per place. [2023-08-26 15:31:20,463 INFO L140 encePairwiseOnDemand]: 228/234 looper letters, 40 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2023-08-26 15:31:20,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 47 transitions, 261 flow [2023-08-26 15:31:20,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:31:20,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:31:20,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 311 transitions. [2023-08-26 15:31:20,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33226495726495725 [2023-08-26 15:31:20,465 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 311 transitions. [2023-08-26 15:31:20,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 311 transitions. [2023-08-26 15:31:20,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:20,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 311 transitions. [2023-08-26 15:31:20,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:20,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:20,468 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:20,468 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 110 flow. Second operand 4 states and 311 transitions. [2023-08-26 15:31:20,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 47 transitions, 261 flow [2023-08-26 15:31:20,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:31:20,473 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 154 flow [2023-08-26 15:31:20,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-26 15:31:20,475 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -6 predicate places. [2023-08-26 15:31:20,475 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 154 flow [2023-08-26 15:31:20,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:20,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:20,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 15:31:20,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:31:20,476 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:20,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:20,477 INFO L85 PathProgramCache]: Analyzing trace with hash 384926061, now seen corresponding path program 1 times [2023-08-26 15:31:20,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:20,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215039945] [2023-08-26 15:31:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:20,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:20,834 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 15:31:20,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:20,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215039945] [2023-08-26 15:31:20,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215039945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:20,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:20,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:31:20,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892584866] [2023-08-26 15:31:20,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:20,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:31:20,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:20,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:31:20,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:31:20,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 234 [2023-08-26 15:31:20,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:20,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:20,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 234 [2023-08-26 15:31:20,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:20,954 INFO L124 PetriNetUnfolderBase]: 75/228 cut-off events. [2023-08-26 15:31:20,954 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2023-08-26 15:31:20,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 228 events. 75/228 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1153 event pairs, 7 based on Foata normal form. 10/215 useless extension candidates. Maximal degree in co-relation 681. Up to 104 conditions per place. [2023-08-26 15:31:20,956 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 44 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2023-08-26 15:31:20,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 318 flow [2023-08-26 15:31:20,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:31:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:31:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2023-08-26 15:31:20,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33760683760683763 [2023-08-26 15:31:20,958 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 316 transitions. [2023-08-26 15:31:20,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 316 transitions. [2023-08-26 15:31:20,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:20,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 316 transitions. [2023-08-26 15:31:20,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:20,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:20,961 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:20,961 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 154 flow. Second operand 4 states and 316 transitions. [2023-08-26 15:31:20,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 318 flow [2023-08-26 15:31:20,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:31:20,963 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 176 flow [2023-08-26 15:31:20,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-08-26 15:31:20,964 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -1 predicate places. [2023-08-26 15:31:20,964 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 176 flow [2023-08-26 15:31:20,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:20,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:20,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:31:20,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:31:20,965 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:20,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:20,965 INFO L85 PathProgramCache]: Analyzing trace with hash 547880006, now seen corresponding path program 1 times [2023-08-26 15:31:20,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:20,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862897534] [2023-08-26 15:31:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:20,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:21,348 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 15:31:21,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:21,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862897534] [2023-08-26 15:31:21,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862897534] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:21,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:21,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:31:21,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742092733] [2023-08-26 15:31:21,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:21,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 15:31:21,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:21,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 15:31:21,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 15:31:21,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 234 [2023-08-26 15:31:21,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 6 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:21,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:21,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 234 [2023-08-26 15:31:21,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:21,505 INFO L124 PetriNetUnfolderBase]: 86/252 cut-off events. [2023-08-26 15:31:21,505 INFO L125 PetriNetUnfolderBase]: For 315/315 co-relation queries the response was YES. [2023-08-26 15:31:21,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 252 events. 86/252 cut-off events. For 315/315 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1262 event pairs, 12 based on Foata normal form. 9/220 useless extension candidates. Maximal degree in co-relation 814. Up to 98 conditions per place. [2023-08-26 15:31:21,507 INFO L140 encePairwiseOnDemand]: 226/234 looper letters, 44 selfloop transitions, 10 changer transitions 0/54 dead transitions. [2023-08-26 15:31:21,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 372 flow [2023-08-26 15:31:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:31:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:31:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 363 transitions. [2023-08-26 15:31:21,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31025641025641026 [2023-08-26 15:31:21,509 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 363 transitions. [2023-08-26 15:31:21,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 363 transitions. [2023-08-26 15:31:21,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:21,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 363 transitions. [2023-08-26 15:31:21,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.6) internal successors, (363), 5 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:21,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:21,512 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:21,512 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 176 flow. Second operand 5 states and 363 transitions. [2023-08-26 15:31:21,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 372 flow [2023-08-26 15:31:21,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 365 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:31:21,515 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 261 flow [2023-08-26 15:31:21,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2023-08-26 15:31:21,515 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2023-08-26 15:31:21,516 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 261 flow [2023-08-26 15:31:21,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 6 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:21,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:21,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:31:21,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:31:21,516 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:21,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:21,517 INFO L85 PathProgramCache]: Analyzing trace with hash 547880007, now seen corresponding path program 1 times [2023-08-26 15:31:21,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:21,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213255555] [2023-08-26 15:31:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:21,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:21,954 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 15:31:21,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:21,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213255555] [2023-08-26 15:31:21,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213255555] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:21,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:21,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:31:21,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100257125] [2023-08-26 15:31:21,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:21,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 15:31:21,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:21,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 15:31:21,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 15:31:21,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 234 [2023-08-26 15:31:21,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 261 flow. Second operand has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:21,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:21,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 234 [2023-08-26 15:31:21,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:22,129 INFO L124 PetriNetUnfolderBase]: 83/260 cut-off events. [2023-08-26 15:31:22,129 INFO L125 PetriNetUnfolderBase]: For 621/621 co-relation queries the response was YES. [2023-08-26 15:31:22,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 260 events. 83/260 cut-off events. For 621/621 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1382 event pairs, 15 based on Foata normal form. 9/225 useless extension candidates. Maximal degree in co-relation 971. Up to 112 conditions per place. [2023-08-26 15:31:22,131 INFO L140 encePairwiseOnDemand]: 225/234 looper letters, 46 selfloop transitions, 14 changer transitions 0/60 dead transitions. [2023-08-26 15:31:22,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 463 flow [2023-08-26 15:31:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 15:31:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 15:31:22,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 454 transitions. [2023-08-26 15:31:22,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2771672771672772 [2023-08-26 15:31:22,133 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 454 transitions. [2023-08-26 15:31:22,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 454 transitions. [2023-08-26 15:31:22,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:22,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 454 transitions. [2023-08-26 15:31:22,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 234.0) internal successors, (1872), 8 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,137 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 234.0) internal successors, (1872), 8 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,137 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 261 flow. Second operand 7 states and 454 transitions. [2023-08-26 15:31:22,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 463 flow [2023-08-26 15:31:22,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 461 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 15:31:22,141 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 334 flow [2023-08-26 15:31:22,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=334, PETRI_PLACES=59, PETRI_TRANSITIONS=42} [2023-08-26 15:31:22,142 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2023-08-26 15:31:22,142 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 334 flow [2023-08-26 15:31:22,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:22,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:31:22,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:31:22,143 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:22,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:22,143 INFO L85 PathProgramCache]: Analyzing trace with hash 427453751, now seen corresponding path program 1 times [2023-08-26 15:31:22,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:22,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761323793] [2023-08-26 15:31:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:22,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:31:22,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:22,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761323793] [2023-08-26 15:31:22,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761323793] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:22,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:22,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:31:22,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62393915] [2023-08-26 15:31:22,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:22,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:31:22,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:22,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:31:22,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:31:22,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 234 [2023-08-26 15:31:22,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 334 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:22,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 234 [2023-08-26 15:31:22,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:22,295 INFO L124 PetriNetUnfolderBase]: 75/232 cut-off events. [2023-08-26 15:31:22,295 INFO L125 PetriNetUnfolderBase]: For 809/809 co-relation queries the response was YES. [2023-08-26 15:31:22,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 232 events. 75/232 cut-off events. For 809/809 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1148 event pairs, 43 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 914. Up to 218 conditions per place. [2023-08-26 15:31:22,297 INFO L140 encePairwiseOnDemand]: 232/234 looper letters, 38 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-26 15:31:22,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 42 transitions, 388 flow [2023-08-26 15:31:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:31:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:31:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2023-08-26 15:31:22,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2023-08-26 15:31:22,299 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2023-08-26 15:31:22,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2023-08-26 15:31:22,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:22,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2023-08-26 15:31:22,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,301 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,301 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 334 flow. Second operand 3 states and 260 transitions. [2023-08-26 15:31:22,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 42 transitions, 388 flow [2023-08-26 15:31:22,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 42 transitions, 381 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 15:31:22,305 INFO L231 Difference]: Finished difference. Result has 58 places, 38 transitions, 293 flow [2023-08-26 15:31:22,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=58, PETRI_TRANSITIONS=38} [2023-08-26 15:31:22,305 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2023-08-26 15:31:22,305 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 38 transitions, 293 flow [2023-08-26 15:31:22,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:22,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:31:22,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:31:22,306 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:22,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:22,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1454913908, now seen corresponding path program 1 times [2023-08-26 15:31:22,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:22,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951600496] [2023-08-26 15:31:22,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:22,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:22,392 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 15:31:22,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:22,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951600496] [2023-08-26 15:31:22,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951600496] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:22,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:22,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:31:22,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119102334] [2023-08-26 15:31:22,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:22,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:31:22,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:22,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:31:22,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:31:22,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 234 [2023-08-26 15:31:22,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 38 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:22,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 234 [2023-08-26 15:31:22,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:22,523 INFO L124 PetriNetUnfolderBase]: 75/229 cut-off events. [2023-08-26 15:31:22,523 INFO L125 PetriNetUnfolderBase]: For 803/803 co-relation queries the response was YES. [2023-08-26 15:31:22,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 930 conditions, 229 events. 75/229 cut-off events. For 803/803 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1126 event pairs, 32 based on Foata normal form. 1/210 useless extension candidates. Maximal degree in co-relation 912. Up to 149 conditions per place. [2023-08-26 15:31:22,525 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 36 selfloop transitions, 7 changer transitions 2/45 dead transitions. [2023-08-26 15:31:22,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 45 transitions, 399 flow [2023-08-26 15:31:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:31:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:31:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 391 transitions. [2023-08-26 15:31:22,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33418803418803417 [2023-08-26 15:31:22,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 391 transitions. [2023-08-26 15:31:22,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 391 transitions. [2023-08-26 15:31:22,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:22,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 391 transitions. [2023-08-26 15:31:22,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,530 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,530 INFO L175 Difference]: Start difference. First operand has 58 places, 38 transitions, 293 flow. Second operand 5 states and 391 transitions. [2023-08-26 15:31:22,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 45 transitions, 399 flow [2023-08-26 15:31:22,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 45 transitions, 397 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:31:22,534 INFO L231 Difference]: Finished difference. Result has 59 places, 36 transitions, 297 flow [2023-08-26 15:31:22,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=59, PETRI_TRANSITIONS=36} [2023-08-26 15:31:22,534 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2023-08-26 15:31:22,534 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 36 transitions, 297 flow [2023-08-26 15:31:22,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:22,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:31:22,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:31:22,535 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:22,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:22,536 INFO L85 PathProgramCache]: Analyzing trace with hash 366164618, now seen corresponding path program 1 times [2023-08-26 15:31:22,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:22,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542161020] [2023-08-26 15:31:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:22,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:22,610 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 15:31:22,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:22,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542161020] [2023-08-26 15:31:22,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542161020] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:22,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:22,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:31:22,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134263115] [2023-08-26 15:31:22,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:22,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:31:22,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:22,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:31:22,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:31:22,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 234 [2023-08-26 15:31:22,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 36 transitions, 297 flow. Second operand has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:22,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 234 [2023-08-26 15:31:22,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:22,716 INFO L124 PetriNetUnfolderBase]: 59/204 cut-off events. [2023-08-26 15:31:22,716 INFO L125 PetriNetUnfolderBase]: For 839/839 co-relation queries the response was YES. [2023-08-26 15:31:22,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 204 events. 59/204 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1005 event pairs, 25 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 848. Up to 159 conditions per place. [2023-08-26 15:31:22,718 INFO L140 encePairwiseOnDemand]: 228/234 looper letters, 33 selfloop transitions, 7 changer transitions 6/46 dead transitions. [2023-08-26 15:31:22,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 46 transitions, 429 flow [2023-08-26 15:31:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:31:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:31:22,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 322 transitions. [2023-08-26 15:31:22,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.344017094017094 [2023-08-26 15:31:22,720 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 322 transitions. [2023-08-26 15:31:22,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 322 transitions. [2023-08-26 15:31:22,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:22,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 322 transitions. [2023-08-26 15:31:22,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,722 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,722 INFO L175 Difference]: Start difference. First operand has 59 places, 36 transitions, 297 flow. Second operand 4 states and 322 transitions. [2023-08-26 15:31:22,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 46 transitions, 429 flow [2023-08-26 15:31:22,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 46 transitions, 417 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 15:31:22,726 INFO L231 Difference]: Finished difference. Result has 61 places, 34 transitions, 301 flow [2023-08-26 15:31:22,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=61, PETRI_TRANSITIONS=34} [2023-08-26 15:31:22,727 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2023-08-26 15:31:22,727 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 34 transitions, 301 flow [2023-08-26 15:31:22,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:22,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:31:22,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 15:31:22,728 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:22,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1150201333, now seen corresponding path program 1 times [2023-08-26 15:31:22,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:22,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251977591] [2023-08-26 15:31:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:22,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:22,800 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 15:31:22,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:22,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251977591] [2023-08-26 15:31:22,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251977591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:22,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:22,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:31:22,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275473889] [2023-08-26 15:31:22,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:22,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:31:22,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:22,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:31:22,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:31:22,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-26 15:31:22,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 34 transitions, 301 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:22,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-26 15:31:22,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:22,860 INFO L124 PetriNetUnfolderBase]: 20/117 cut-off events. [2023-08-26 15:31:22,860 INFO L125 PetriNetUnfolderBase]: For 829/829 co-relation queries the response was YES. [2023-08-26 15:31:22,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 117 events. 20/117 cut-off events. For 829/829 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 522 event pairs, 4 based on Foata normal form. 8/125 useless extension candidates. Maximal degree in co-relation 587. Up to 64 conditions per place. [2023-08-26 15:31:22,861 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 30 selfloop transitions, 4 changer transitions 2/39 dead transitions. [2023-08-26 15:31:22,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 39 transitions, 444 flow [2023-08-26 15:31:22,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:31:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:31:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-08-26 15:31:22,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4686609686609687 [2023-08-26 15:31:22,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-08-26 15:31:22,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-08-26 15:31:22,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:22,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-08-26 15:31:22,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,865 INFO L175 Difference]: Start difference. First operand has 61 places, 34 transitions, 301 flow. Second operand 3 states and 329 transitions. [2023-08-26 15:31:22,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 39 transitions, 444 flow [2023-08-26 15:31:22,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 39 transitions, 407 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-26 15:31:22,869 INFO L231 Difference]: Finished difference. Result has 58 places, 33 transitions, 270 flow [2023-08-26 15:31:22,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=58, PETRI_TRANSITIONS=33} [2023-08-26 15:31:22,869 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2023-08-26 15:31:22,869 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 33 transitions, 270 flow [2023-08-26 15:31:22,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:22,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:31:22,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 15:31:22,870 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:22,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:22,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1494050400, now seen corresponding path program 1 times [2023-08-26 15:31:22,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:22,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186464399] [2023-08-26 15:31:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:22,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:22,995 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 15:31:22,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:22,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186464399] [2023-08-26 15:31:22,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186464399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:22,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:22,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:31:22,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294562427] [2023-08-26 15:31:22,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:22,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:31:22,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:22,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:31:22,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:31:22,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 234 [2023-08-26 15:31:22,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 33 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:22,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:22,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 234 [2023-08-26 15:31:22,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:23,058 INFO L124 PetriNetUnfolderBase]: 20/107 cut-off events. [2023-08-26 15:31:23,059 INFO L125 PetriNetUnfolderBase]: For 548/548 co-relation queries the response was YES. [2023-08-26 15:31:23,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 107 events. 20/107 cut-off events. For 548/548 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 422 event pairs, 13 based on Foata normal form. 7/114 useless extension candidates. Maximal degree in co-relation 554. Up to 59 conditions per place. [2023-08-26 15:31:23,060 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 23 selfloop transitions, 3 changer transitions 9/35 dead transitions. [2023-08-26 15:31:23,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 35 transitions, 348 flow [2023-08-26 15:31:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:31:23,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:31:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 304 transitions. [2023-08-26 15:31:23,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3247863247863248 [2023-08-26 15:31:23,061 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 304 transitions. [2023-08-26 15:31:23,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 304 transitions. [2023-08-26 15:31:23,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:23,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 304 transitions. [2023-08-26 15:31:23,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,064 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,064 INFO L175 Difference]: Start difference. First operand has 58 places, 33 transitions, 270 flow. Second operand 4 states and 304 transitions. [2023-08-26 15:31:23,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 35 transitions, 348 flow [2023-08-26 15:31:23,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 35 transitions, 324 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 15:31:23,067 INFO L231 Difference]: Finished difference. Result has 55 places, 25 transitions, 186 flow [2023-08-26 15:31:23,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=55, PETRI_TRANSITIONS=25} [2023-08-26 15:31:23,067 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2023-08-26 15:31:23,067 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 25 transitions, 186 flow [2023-08-26 15:31:23,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:23,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:31:23,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 15:31:23,068 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:23,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:23,069 INFO L85 PathProgramCache]: Analyzing trace with hash 768090146, now seen corresponding path program 1 times [2023-08-26 15:31:23,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:23,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199358846] [2023-08-26 15:31:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:23,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:23,391 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 15:31:23,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:23,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199358846] [2023-08-26 15:31:23,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199358846] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:23,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:23,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 15:31:23,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86226] [2023-08-26 15:31:23,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:23,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:31:23,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:23,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:31:23,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:31:23,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 234 [2023-08-26 15:31:23,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 25 transitions, 186 flow. Second operand has 7 states, 7 states have (on average 58.857142857142854) internal successors, (412), 7 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:23,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 234 [2023-08-26 15:31:23,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:23,616 INFO L124 PetriNetUnfolderBase]: 19/86 cut-off events. [2023-08-26 15:31:23,616 INFO L125 PetriNetUnfolderBase]: For 575/575 co-relation queries the response was YES. [2023-08-26 15:31:23,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 86 events. 19/86 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 294 event pairs, 0 based on Foata normal form. 1/87 useless extension candidates. Maximal degree in co-relation 425. Up to 21 conditions per place. [2023-08-26 15:31:23,617 INFO L140 encePairwiseOnDemand]: 226/234 looper letters, 31 selfloop transitions, 16 changer transitions 4/51 dead transitions. [2023-08-26 15:31:23,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 51 transitions, 417 flow [2023-08-26 15:31:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 15:31:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 15:31:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 734 transitions. [2023-08-26 15:31:23,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2613960113960114 [2023-08-26 15:31:23,620 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 734 transitions. [2023-08-26 15:31:23,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 734 transitions. [2023-08-26 15:31:23,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:23,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 734 transitions. [2023-08-26 15:31:23,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.166666666666664) internal successors, (734), 12 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 234.0) internal successors, (3042), 13 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,626 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 234.0) internal successors, (3042), 13 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,626 INFO L175 Difference]: Start difference. First operand has 55 places, 25 transitions, 186 flow. Second operand 12 states and 734 transitions. [2023-08-26 15:31:23,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 51 transitions, 417 flow [2023-08-26 15:31:23,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 51 transitions, 390 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-26 15:31:23,628 INFO L231 Difference]: Finished difference. Result has 56 places, 30 transitions, 248 flow [2023-08-26 15:31:23,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=248, PETRI_PLACES=56, PETRI_TRANSITIONS=30} [2023-08-26 15:31:23,629 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2023-08-26 15:31:23,629 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 30 transitions, 248 flow [2023-08-26 15:31:23,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.857142857142854) internal successors, (412), 7 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:23,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:31:23,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 15:31:23,630 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:23,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:23,630 INFO L85 PathProgramCache]: Analyzing trace with hash 768090145, now seen corresponding path program 1 times [2023-08-26 15:31:23,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:23,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334413879] [2023-08-26 15:31:23,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:23,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:23,787 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 15:31:23,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:23,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334413879] [2023-08-26 15:31:23,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334413879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:23,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:23,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 15:31:23,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266589861] [2023-08-26 15:31:23,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:23,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:31:23,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:23,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:31:23,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:31:23,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 234 [2023-08-26 15:31:23,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 30 transitions, 248 flow. Second operand has 7 states, 7 states have (on average 65.85714285714286) internal successors, (461), 7 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:23,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 234 [2023-08-26 15:31:23,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:23,946 INFO L124 PetriNetUnfolderBase]: 19/85 cut-off events. [2023-08-26 15:31:23,946 INFO L125 PetriNetUnfolderBase]: For 542/542 co-relation queries the response was YES. [2023-08-26 15:31:23,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 85 events. 19/85 cut-off events. For 542/542 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 283 event pairs, 2 based on Foata normal form. 1/86 useless extension candidates. Maximal degree in co-relation 427. Up to 28 conditions per place. [2023-08-26 15:31:23,947 INFO L140 encePairwiseOnDemand]: 224/234 looper letters, 19 selfloop transitions, 17 changer transitions 7/43 dead transitions. [2023-08-26 15:31:23,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 43 transitions, 403 flow [2023-08-26 15:31:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 15:31:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 15:31:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 741 transitions. [2023-08-26 15:31:23,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2878787878787879 [2023-08-26 15:31:23,950 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 741 transitions. [2023-08-26 15:31:23,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 741 transitions. [2023-08-26 15:31:23,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:23,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 741 transitions. [2023-08-26 15:31:23,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 67.36363636363636) internal successors, (741), 11 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 234.0) internal successors, (2808), 12 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,957 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 234.0) internal successors, (2808), 12 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,957 INFO L175 Difference]: Start difference. First operand has 56 places, 30 transitions, 248 flow. Second operand 11 states and 741 transitions. [2023-08-26 15:31:23,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 43 transitions, 403 flow [2023-08-26 15:31:23,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 43 transitions, 372 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-26 15:31:23,960 INFO L231 Difference]: Finished difference. Result has 58 places, 26 transitions, 229 flow [2023-08-26 15:31:23,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=229, PETRI_PLACES=58, PETRI_TRANSITIONS=26} [2023-08-26 15:31:23,961 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2023-08-26 15:31:23,961 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 26 transitions, 229 flow [2023-08-26 15:31:23,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 65.85714285714286) internal successors, (461), 7 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:23,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:31:23,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:31:23,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 15:31:23,962 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 15:31:23,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:31:23,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1321464207, now seen corresponding path program 1 times [2023-08-26 15:31:23,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:31:23,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137687747] [2023-08-26 15:31:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:31:23,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:31:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:31:24,101 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 15:31:24,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:31:24,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137687747] [2023-08-26 15:31:24,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137687747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:31:24,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:31:24,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 15:31:24,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575701853] [2023-08-26 15:31:24,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:31:24,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:31:24,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:31:24,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:31:24,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:31:24,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 234 [2023-08-26 15:31:24,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 26 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:24,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:31:24,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 234 [2023-08-26 15:31:24,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:31:24,183 INFO L124 PetriNetUnfolderBase]: 17/67 cut-off events. [2023-08-26 15:31:24,183 INFO L125 PetriNetUnfolderBase]: For 385/385 co-relation queries the response was YES. [2023-08-26 15:31:24,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 67 events. 17/67 cut-off events. For 385/385 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 201 event pairs, 3 based on Foata normal form. 4/71 useless extension candidates. Maximal degree in co-relation 348. Up to 43 conditions per place. [2023-08-26 15:31:24,184 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-08-26 15:31:24,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 30 transitions, 302 flow [2023-08-26 15:31:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:31:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:31:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 361 transitions. [2023-08-26 15:31:24,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30854700854700856 [2023-08-26 15:31:24,186 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 361 transitions. [2023-08-26 15:31:24,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 361 transitions. [2023-08-26 15:31:24,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:31:24,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 361 transitions. [2023-08-26 15:31:24,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:24,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:24,189 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:24,189 INFO L175 Difference]: Start difference. First operand has 58 places, 26 transitions, 229 flow. Second operand 5 states and 361 transitions. [2023-08-26 15:31:24,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 30 transitions, 302 flow [2023-08-26 15:31:24,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 30 transitions, 246 flow, removed 3 selfloop flow, removed 12 redundant places. [2023-08-26 15:31:24,191 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2023-08-26 15:31:24,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2023-08-26 15:31:24,191 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2023-08-26 15:31:24,192 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2023-08-26 15:31:24,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:31:24,194 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 37 remaining) [2023-08-26 15:31:24,194 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 37 remaining) [2023-08-26 15:31:24,194 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 37 remaining) [2023-08-26 15:31:24,195 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 37 remaining) [2023-08-26 15:31:24,195 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 37 remaining) [2023-08-26 15:31:24,195 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 37 remaining) [2023-08-26 15:31:24,195 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 37 remaining) [2023-08-26 15:31:24,195 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 37 remaining) [2023-08-26 15:31:24,195 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 37 remaining) [2023-08-26 15:31:24,195 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 37 remaining) [2023-08-26 15:31:24,195 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 37 remaining) [2023-08-26 15:31:24,195 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 37 remaining) [2023-08-26 15:31:24,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 37 remaining) [2023-08-26 15:31:24,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 37 remaining) [2023-08-26 15:31:24,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 37 remaining) [2023-08-26 15:31:24,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 37 remaining) [2023-08-26 15:31:24,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (20 of 37 remaining) [2023-08-26 15:31:24,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 37 remaining) [2023-08-26 15:31:24,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 37 remaining) [2023-08-26 15:31:24,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 37 remaining) [2023-08-26 15:31:24,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 37 remaining) [2023-08-26 15:31:24,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 37 remaining) [2023-08-26 15:31:24,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 37 remaining) [2023-08-26 15:31:24,197 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 37 remaining) [2023-08-26 15:31:24,197 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 37 remaining) [2023-08-26 15:31:24,197 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 37 remaining) [2023-08-26 15:31:24,197 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 37 remaining) [2023-08-26 15:31:24,197 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 37 remaining) [2023-08-26 15:31:24,197 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 37 remaining) [2023-08-26 15:31:24,197 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 37 remaining) [2023-08-26 15:31:24,198 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 37 remaining) [2023-08-26 15:31:24,198 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 37 remaining) [2023-08-26 15:31:24,198 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 37 remaining) [2023-08-26 15:31:24,198 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 37 remaining) [2023-08-26 15:31:24,198 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 37 remaining) [2023-08-26 15:31:24,198 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 37 remaining) [2023-08-26 15:31:24,198 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 37 remaining) [2023-08-26 15:31:24,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 15:31:24,198 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:31:24,203 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:31:24,203 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:31:24,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:31:24 BasicIcfg [2023-08-26 15:31:24,206 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:31:24,207 INFO L158 Benchmark]: Toolchain (without parser) took 34916.34ms. Allocated memory was 341.8MB in the beginning and 434.1MB in the end (delta: 92.3MB). Free memory was 315.8MB in the beginning and 184.0MB in the end (delta: 131.7MB). Peak memory consumption was 226.2MB. Max. memory is 16.0GB. [2023-08-26 15:31:24,207 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 341.8MB. Free memory is still 318.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:31:24,207 INFO L158 Benchmark]: CACSL2BoogieTranslator took 716.77ms. Allocated memory is still 341.8MB. Free memory was 315.8MB in the beginning and 278.1MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. [2023-08-26 15:31:24,207 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.14ms. Allocated memory is still 341.8MB. Free memory was 278.1MB in the beginning and 275.5MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:31:24,207 INFO L158 Benchmark]: Boogie Preprocessor took 29.09ms. Allocated memory is still 341.8MB. Free memory was 275.5MB in the beginning and 273.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:31:24,208 INFO L158 Benchmark]: RCFGBuilder took 446.05ms. Allocated memory is still 341.8MB. Free memory was 273.4MB in the beginning and 308.0MB in the end (delta: -34.6MB). Peak memory consumption was 16.2MB. Max. memory is 16.0GB. [2023-08-26 15:31:24,208 INFO L158 Benchmark]: TraceAbstraction took 33670.25ms. Allocated memory was 341.8MB in the beginning and 434.1MB in the end (delta: 92.3MB). Free memory was 307.0MB in the beginning and 184.0MB in the end (delta: 123.0MB). Peak memory consumption was 216.3MB. Max. memory is 16.0GB. [2023-08-26 15:31:24,209 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 341.8MB. Free memory is still 318.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 716.77ms. Allocated memory is still 341.8MB. Free memory was 315.8MB in the beginning and 278.1MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 49.14ms. Allocated memory is still 341.8MB. Free memory was 278.1MB in the beginning and 275.5MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.09ms. Allocated memory is still 341.8MB. Free memory was 275.5MB in the beginning and 273.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 446.05ms. Allocated memory is still 341.8MB. Free memory was 273.4MB in the beginning and 308.0MB in the end (delta: -34.6MB). Peak memory consumption was 16.2MB. Max. memory is 16.0GB. * TraceAbstraction took 33670.25ms. Allocated memory was 341.8MB in the beginning and 434.1MB in the end (delta: 92.3MB). Free memory was 307.0MB in the beginning and 184.0MB in the end (delta: 123.0MB). Peak memory consumption was 216.3MB. 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: 28.0s, 116 PlacesBefore, 45 PlacesAfterwards, 112 TransitionsBefore, 41 TransitionsAfterwards, 1280 CoEnabledTransitionPairs, 7 FixpointIterations, 82 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 121 TotalNumberOfCompositions, 4946 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2196, independent: 1879, independent conditional: 0, independent unconditional: 1879, dependent: 317, dependent conditional: 0, dependent unconditional: 317, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 720, independent: 669, independent conditional: 0, independent unconditional: 669, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2196, independent: 1210, independent conditional: 0, independent unconditional: 1210, dependent: 266, dependent conditional: 0, dependent unconditional: 266, unknown: 720, unknown conditional: 0, unknown unconditional: 720] , Statistics on independence cache: Total cache size (in pairs): 112, Positive cache size: 87, Positive conditional cache size: 0, Positive unconditional cache size: 87, Negative cache size: 25, Negative conditional cache size: 0, Negative unconditional cache size: 25, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 148 locations, 37 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 33.5s, OverallIterations: 17, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 28.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 479 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 479 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 74 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 874 IncrementalHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 74 mSolverCounterUnsat, 9 mSDtfsCounter, 874 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=334occurred in iteration=9, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 130 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 113 ConstructedInterpolants, 0 QuantifiedInterpolants, 1073 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 26 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 15:31:24,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...