/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/09-regions_04-list2_nr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:23:58,255 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:23:58,329 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 12:23:58,334 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:23:58,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:23:58,368 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:23:58,369 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:23:58,370 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:23:58,370 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:23:58,372 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:23:58,372 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:23:58,373 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:23:58,373 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:23:58,373 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:23:58,373 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:23:58,374 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:23:58,374 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:23:58,374 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:23:58,374 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:23:58,375 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:23:58,375 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:23:58,375 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:23:58,376 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:23:58,376 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:23:58,376 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:23:58,376 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:23:58,377 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:23:58,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:23:58,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:23:58,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:23:58,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:23:58,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:23:58,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:23:58,378 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:23:58,379 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:23:58,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:23:58,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:23:58,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:23:58,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:23:58,712 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:23:58,712 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:23:58,713 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_04-list2_nr.i [2023-08-26 12:24:00,289 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:24:00,573 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:24:00,573 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_04-list2_nr.i [2023-08-26 12:24:00,598 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f05b7a2/13e8485a071543f0be78ab501ad7b3d1/FLAG5a2a96c74 [2023-08-26 12:24:00,621 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f05b7a2/13e8485a071543f0be78ab501ad7b3d1 [2023-08-26 12:24:00,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:24:00,628 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:24:00,630 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:24:00,630 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:24:00,633 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:24:00,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:24:00" (1/1) ... [2023-08-26 12:24:00,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a4a75ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:00, skipping insertion in model container [2023-08-26 12:24:00,635 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:24:00" (1/1) ... [2023-08-26 12:24:00,698 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:24:01,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:24:01,141 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:24:01,153 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:24:01,155 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:24:01,175 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [1044] [2023-08-26 12:24:01,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:24:01,293 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:24:01,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:01 WrapperNode [2023-08-26 12:24:01,294 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:24:01,295 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:24:01,295 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:24:01,295 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:24:01,301 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:01" (1/1) ... [2023-08-26 12:24:01,333 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:01" (1/1) ... [2023-08-26 12:24:01,357 INFO L138 Inliner]: procedures = 368, calls = 45, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 86 [2023-08-26 12:24:01,357 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:24:01,358 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:24:01,358 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:24:01,358 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:24:01,365 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:01" (1/1) ... [2023-08-26 12:24:01,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:01" (1/1) ... [2023-08-26 12:24:01,378 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:01" (1/1) ... [2023-08-26 12:24:01,378 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:01" (1/1) ... [2023-08-26 12:24:01,386 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:01" (1/1) ... [2023-08-26 12:24:01,387 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:01" (1/1) ... [2023-08-26 12:24:01,405 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:01" (1/1) ... [2023-08-26 12:24:01,407 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:01" (1/1) ... [2023-08-26 12:24:01,409 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:24:01,410 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:24:01,410 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:24:01,410 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:24:01,411 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:01" (1/1) ... [2023-08-26 12:24:01,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:24:01,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:24:01,453 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 12:24:01,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 12:24:01,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:24:01,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-26 12:24:01,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:24:01,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:24:01,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:24:01,488 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:24:01,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-26 12:24:01,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:24:01,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-26 12:24:01,488 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 12:24:01,488 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 12:24:01,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:24:01,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:24:01,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:24:01,490 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 12:24:01,631 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:24:01,634 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:24:02,039 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:24:02,051 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:24:02,051 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 12:24:02,054 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:24:02 BoogieIcfgContainer [2023-08-26 12:24:02,054 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:24:02,057 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:24:02,057 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:24:02,060 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:24:02,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:24:00" (1/3) ... [2023-08-26 12:24:02,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26214c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:24:02, skipping insertion in model container [2023-08-26 12:24:02,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:01" (2/3) ... [2023-08-26 12:24:02,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26214c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:24:02, skipping insertion in model container [2023-08-26 12:24:02,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:24:02" (3/3) ... [2023-08-26 12:24:02,063 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_04-list2_nr.i [2023-08-26 12:24:02,078 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:24:02,078 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-08-26 12:24:02,079 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:24:02,167 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:24:02,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 159 transitions, 323 flow [2023-08-26 12:24:02,285 INFO L124 PetriNetUnfolderBase]: 0/158 cut-off events. [2023-08-26 12:24:02,286 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:24:02,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 158 events. 0/158 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 218 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-08-26 12:24:02,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 159 transitions, 323 flow [2023-08-26 12:24:02,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 158 transitions, 319 flow [2023-08-26 12:24:02,302 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:24:02,314 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 158 transitions, 319 flow [2023-08-26 12:24:02,318 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 158 transitions, 319 flow [2023-08-26 12:24:02,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 158 transitions, 319 flow [2023-08-26 12:24:02,350 INFO L124 PetriNetUnfolderBase]: 0/158 cut-off events. [2023-08-26 12:24:02,351 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:24:02,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 158 events. 0/158 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 219 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-08-26 12:24:02,353 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2023-08-26 12:24:28,398 WARN L234 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 186 DAG size of output: 180 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-26 12:25:28,085 WARN L234 SmtUtils]: Spent 36.77s on a formula simplification. DAG size of input: 334 DAG size of output: 322 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-26 12:25:47,015 WARN L234 SmtUtils]: Spent 18.92s on a formula simplification that was a NOOP. DAG size: 287 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-26 12:26:22,309 WARN L234 SmtUtils]: Spent 35.29s on a formula simplification. DAG size of input: 337 DAG size of output: 325 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-26 12:26:33,904 WARN L234 SmtUtils]: Spent 11.59s on a formula simplification that was a NOOP. DAG size: 291 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-26 12:26:34,050 INFO L134 LiptonReduction]: Checked pairs total: 12363 [2023-08-26 12:26:34,050 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-08-26 12:26:34,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:26:34,065 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;@b5a1abe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:26:34,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-08-26 12:26:34,067 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:26:34,067 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 12:26:34,067 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:26:34,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:34,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:26:34,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:34,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:34,072 INFO L85 PathProgramCache]: Analyzing trace with hash 574, now seen corresponding path program 1 times [2023-08-26 12:26:34,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:34,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661754925] [2023-08-26 12:26:34,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:34,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:34,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:34,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661754925] [2023-08-26 12:26:34,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661754925] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:34,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:34,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:26:34,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429834519] [2023-08-26 12:26:34,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:34,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:26:34,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:34,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:26:34,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:26:34,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 375 [2023-08-26 12:26:34,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 127 flow. Second operand has 2 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:34,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:34,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 375 [2023-08-26 12:26:34,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:34,456 INFO L124 PetriNetUnfolderBase]: 180/455 cut-off events. [2023-08-26 12:26:34,456 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:26:34,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 849 conditions, 455 events. 180/455 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2413 event pairs, 180 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 840. Up to 390 conditions per place. [2023-08-26 12:26:34,466 INFO L140 encePairwiseOnDemand]: 351/375 looper letters, 29 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2023-08-26 12:26:34,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 137 flow [2023-08-26 12:26:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:26:34,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:26:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 369 transitions. [2023-08-26 12:26:34,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.492 [2023-08-26 12:26:34,489 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 369 transitions. [2023-08-26 12:26:34,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 369 transitions. [2023-08-26 12:26:34,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:34,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 369 transitions. [2023-08-26 12:26:34,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 184.5) internal successors, (369), 2 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:34,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:34,507 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:34,508 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 127 flow. Second operand 2 states and 369 transitions. [2023-08-26 12:26:34,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 137 flow [2023-08-26 12:26:34,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:26:34,515 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 78 flow [2023-08-26 12:26:34,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-08-26 12:26:34,520 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -24 predicate places. [2023-08-26 12:26:34,520 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 78 flow [2023-08-26 12:26:34,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:34,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:34,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:26:34,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:26:34,521 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:34,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:34,529 INFO L85 PathProgramCache]: Analyzing trace with hash 590119, now seen corresponding path program 1 times [2023-08-26 12:26:34,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:34,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39557553] [2023-08-26 12:26:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:34,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:35,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:35,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39557553] [2023-08-26 12:26:35,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39557553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:35,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:35,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:26:35,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98914905] [2023-08-26 12:26:35,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:35,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:26:35,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:35,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:26:35,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:26:35,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 375 [2023-08-26 12:26:35,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:35,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:35,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 375 [2023-08-26 12:26:35,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:35,299 INFO L124 PetriNetUnfolderBase]: 210/493 cut-off events. [2023-08-26 12:26:35,300 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:26:35,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 493 events. 210/493 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2484 event pairs, 210 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 946. Up to 451 conditions per place. [2023-08-26 12:26:35,304 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 30 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-26 12:26:35,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 36 transitions, 136 flow [2023-08-26 12:26:35,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:26:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:26:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-26 12:26:35,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.304 [2023-08-26 12:26:35,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-26 12:26:35,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-26 12:26:35,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:35,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-26 12:26:35,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:35,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:35,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:35,314 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 78 flow. Second operand 3 states and 342 transitions. [2023-08-26 12:26:35,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 36 transitions, 136 flow [2023-08-26 12:26:35,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:26:35,318 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 76 flow [2023-08-26 12:26:35,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2023-08-26 12:26:35,319 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -24 predicate places. [2023-08-26 12:26:35,319 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 76 flow [2023-08-26 12:26:35,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:35,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:35,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:26:35,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:26:35,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:35,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:35,321 INFO L85 PathProgramCache]: Analyzing trace with hash 590121, now seen corresponding path program 1 times [2023-08-26 12:26:35,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:35,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476968533] [2023-08-26 12:26:35,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:35,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:35,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:35,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476968533] [2023-08-26 12:26:35,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476968533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:35,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:35,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:26:35,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199989237] [2023-08-26 12:26:35,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:35,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:26:35,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:35,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:26:35,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:26:35,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 375 [2023-08-26 12:26:35,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:35,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:35,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 375 [2023-08-26 12:26:35,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:35,907 INFO L124 PetriNetUnfolderBase]: 232/525 cut-off events. [2023-08-26 12:26:35,908 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:26:35,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 525 events. 232/525 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2633 event pairs, 216 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 1045. Up to 481 conditions per place. [2023-08-26 12:26:35,913 INFO L140 encePairwiseOnDemand]: 369/375 looper letters, 46 selfloop transitions, 4 changer transitions 2/53 dead transitions. [2023-08-26 12:26:35,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 214 flow [2023-08-26 12:26:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:26:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:26:35,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-08-26 12:26:35,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31733333333333336 [2023-08-26 12:26:35,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-08-26 12:26:35,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-08-26 12:26:35,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:35,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-08-26 12:26:35,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:35,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:35,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:35,920 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 76 flow. Second operand 3 states and 357 transitions. [2023-08-26 12:26:35,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 214 flow [2023-08-26 12:26:35,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 53 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:26:35,922 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 99 flow [2023-08-26 12:26:35,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-08-26 12:26:35,923 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -22 predicate places. [2023-08-26 12:26:35,923 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 99 flow [2023-08-26 12:26:35,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:35,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:35,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:26:35,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:26:35,924 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:35,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:35,925 INFO L85 PathProgramCache]: Analyzing trace with hash 18291946, now seen corresponding path program 1 times [2023-08-26 12:26:35,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:35,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690459615] [2023-08-26 12:26:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:35,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:36,954 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 12:26:36,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:36,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690459615] [2023-08-26 12:26:36,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690459615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:36,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:36,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:26:36,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900971880] [2023-08-26 12:26:36,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:36,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:26:36,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:36,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:26:36,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:26:36,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 375 [2023-08-26 12:26:36,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:36,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:36,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 375 [2023-08-26 12:26:36,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:37,156 INFO L124 PetriNetUnfolderBase]: 164/412 cut-off events. [2023-08-26 12:26:37,156 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-26 12:26:37,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 835 conditions, 412 events. 164/412 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2116 event pairs, 44 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 830. Up to 280 conditions per place. [2023-08-26 12:26:37,158 INFO L140 encePairwiseOnDemand]: 371/375 looper letters, 40 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-26 12:26:37,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 201 flow [2023-08-26 12:26:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:26:37,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:26:37,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2023-08-26 12:26:37,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3128888888888889 [2023-08-26 12:26:37,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2023-08-26 12:26:37,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2023-08-26 12:26:37,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:37,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2023-08-26 12:26:37,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:37,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:37,165 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:37,165 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 99 flow. Second operand 3 states and 352 transitions. [2023-08-26 12:26:37,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 201 flow [2023-08-26 12:26:37,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 193 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:26:37,167 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 91 flow [2023-08-26 12:26:37,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-08-26 12:26:37,167 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -22 predicate places. [2023-08-26 12:26:37,168 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 91 flow [2023-08-26 12:26:37,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:37,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:37,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:26:37,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:26:37,168 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:37,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash 18292333, now seen corresponding path program 1 times [2023-08-26 12:26:37,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:37,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646165142] [2023-08-26 12:26:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:37,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:37,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:37,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646165142] [2023-08-26 12:26:37,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646165142] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:37,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:37,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:26:37,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26283651] [2023-08-26 12:26:37,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:37,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:26:37,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:37,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:26:37,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:26:37,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 375 [2023-08-26 12:26:37,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:37,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:37,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 375 [2023-08-26 12:26:37,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:38,167 INFO L124 PetriNetUnfolderBase]: 208/472 cut-off events. [2023-08-26 12:26:38,167 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-26 12:26:38,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1018 conditions, 472 events. 208/472 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2363 event pairs, 83 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 1012. Up to 349 conditions per place. [2023-08-26 12:26:38,170 INFO L140 encePairwiseOnDemand]: 370/375 looper letters, 46 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-26 12:26:38,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 228 flow [2023-08-26 12:26:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:26:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:26:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-08-26 12:26:38,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31466666666666665 [2023-08-26 12:26:38,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-08-26 12:26:38,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-08-26 12:26:38,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:38,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-08-26 12:26:38,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:38,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:38,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:38,176 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 91 flow. Second operand 3 states and 354 transitions. [2023-08-26 12:26:38,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 228 flow [2023-08-26 12:26:38,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:26:38,178 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 112 flow [2023-08-26 12:26:38,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-26 12:26:38,179 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -21 predicate places. [2023-08-26 12:26:38,179 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 112 flow [2023-08-26 12:26:38,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:38,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:38,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:26:38,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:26:38,180 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:38,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:38,180 INFO L85 PathProgramCache]: Analyzing trace with hash 567047493, now seen corresponding path program 1 times [2023-08-26 12:26:38,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:38,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483673941] [2023-08-26 12:26:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:38,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:38,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:38,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483673941] [2023-08-26 12:26:38,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483673941] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:38,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:38,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:26:38,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114784755] [2023-08-26 12:26:38,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:38,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:26:38,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:38,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:26:38,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:26:38,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 375 [2023-08-26 12:26:38,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:38,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:38,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 375 [2023-08-26 12:26:38,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:38,942 INFO L124 PetriNetUnfolderBase]: 186/424 cut-off events. [2023-08-26 12:26:38,943 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-26 12:26:38,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 424 events. 186/424 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2122 event pairs, 43 based on Foata normal form. 13/312 useless extension candidates. Maximal degree in co-relation 964. Up to 346 conditions per place. [2023-08-26 12:26:38,945 INFO L140 encePairwiseOnDemand]: 368/375 looper letters, 53 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2023-08-26 12:26:38,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 61 transitions, 288 flow [2023-08-26 12:26:38,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:26:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:26:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 553 transitions. [2023-08-26 12:26:38,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2949333333333333 [2023-08-26 12:26:38,948 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 553 transitions. [2023-08-26 12:26:38,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 553 transitions. [2023-08-26 12:26:38,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:38,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 553 transitions. [2023-08-26 12:26:38,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:38,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:38,953 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:38,953 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 112 flow. Second operand 5 states and 553 transitions. [2023-08-26 12:26:38,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 61 transitions, 288 flow [2023-08-26 12:26:38,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:26:38,955 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 156 flow [2023-08-26 12:26:38,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-26 12:26:38,956 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -15 predicate places. [2023-08-26 12:26:38,956 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 156 flow [2023-08-26 12:26:38,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:38,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:38,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:38,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:26:38,957 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:38,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:38,958 INFO L85 PathProgramCache]: Analyzing trace with hash -514909174, now seen corresponding path program 1 times [2023-08-26 12:26:38,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:38,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547699199] [2023-08-26 12:26:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:38,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:39,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:39,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547699199] [2023-08-26 12:26:39,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547699199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:39,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:39,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:26:39,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181018301] [2023-08-26 12:26:39,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:39,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:26:39,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:39,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:26:39,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:26:39,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 375 [2023-08-26 12:26:39,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:39,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 375 [2023-08-26 12:26:39,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:39,228 INFO L124 PetriNetUnfolderBase]: 147/356 cut-off events. [2023-08-26 12:26:39,228 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-08-26 12:26:39,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 356 events. 147/356 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1686 event pairs, 145 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 844. Up to 335 conditions per place. [2023-08-26 12:26:39,230 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 32 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-26 12:26:39,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 218 flow [2023-08-26 12:26:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:26:39,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:26:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-26 12:26:39,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30044444444444446 [2023-08-26 12:26:39,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-26 12:26:39,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-26 12:26:39,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:39,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-26 12:26:39,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,237 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 156 flow. Second operand 3 states and 338 transitions. [2023-08-26 12:26:39,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 218 flow [2023-08-26 12:26:39,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 38 transitions, 209 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 12:26:39,242 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 145 flow [2023-08-26 12:26:39,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2023-08-26 12:26:39,244 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -16 predicate places. [2023-08-26 12:26:39,244 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 145 flow [2023-08-26 12:26:39,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:39,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:39,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:26:39,245 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:39,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:39,246 INFO L85 PathProgramCache]: Analyzing trace with hash -514909173, now seen corresponding path program 1 times [2023-08-26 12:26:39,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:39,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637727314] [2023-08-26 12:26:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:39,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:39,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:39,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637727314] [2023-08-26 12:26:39,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637727314] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:39,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:39,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:26:39,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9792000] [2023-08-26 12:26:39,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:39,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:26:39,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:39,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:26:39,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:26:39,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 375 [2023-08-26 12:26:39,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:39,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 375 [2023-08-26 12:26:39,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:39,530 INFO L124 PetriNetUnfolderBase]: 132/324 cut-off events. [2023-08-26 12:26:39,530 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-08-26 12:26:39,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 324 events. 132/324 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1465 event pairs, 122 based on Foata normal form. 14/266 useless extension candidates. Maximal degree in co-relation 777. Up to 283 conditions per place. [2023-08-26 12:26:39,532 INFO L140 encePairwiseOnDemand]: 369/375 looper letters, 38 selfloop transitions, 6 changer transitions 2/47 dead transitions. [2023-08-26 12:26:39,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 255 flow [2023-08-26 12:26:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:26:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:26:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-08-26 12:26:39,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30933333333333335 [2023-08-26 12:26:39,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-08-26 12:26:39,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-08-26 12:26:39,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:39,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-08-26 12:26:39,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,538 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 145 flow. Second operand 3 states and 348 transitions. [2023-08-26 12:26:39,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 255 flow [2023-08-26 12:26:39,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:26:39,541 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 171 flow [2023-08-26 12:26:39,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-08-26 12:26:39,543 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -15 predicate places. [2023-08-26 12:26:39,543 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 171 flow [2023-08-26 12:26:39,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:39,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:39,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:26:39,545 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:39,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:39,546 INFO L85 PathProgramCache]: Analyzing trace with hash 911040734, now seen corresponding path program 1 times [2023-08-26 12:26:39,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:39,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613277507] [2023-08-26 12:26:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:39,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:39,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:39,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613277507] [2023-08-26 12:26:39,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613277507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:39,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:39,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:26:39,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575154790] [2023-08-26 12:26:39,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:39,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:26:39,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:39,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:26:39,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:26:39,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 375 [2023-08-26 12:26:39,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:39,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 375 [2023-08-26 12:26:39,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:39,878 INFO L124 PetriNetUnfolderBase]: 88/266 cut-off events. [2023-08-26 12:26:39,878 INFO L125 PetriNetUnfolderBase]: For 129/134 co-relation queries the response was YES. [2023-08-26 12:26:39,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 714 conditions, 266 events. 88/266 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1405 event pairs, 32 based on Foata normal form. 6/224 useless extension candidates. Maximal degree in co-relation 703. Up to 137 conditions per place. [2023-08-26 12:26:39,880 INFO L140 encePairwiseOnDemand]: 369/375 looper letters, 47 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2023-08-26 12:26:39,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 379 flow [2023-08-26 12:26:39,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:26:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:26:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-26 12:26:39,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231111111111111 [2023-08-26 12:26:39,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-26 12:26:39,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-26 12:26:39,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:39,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-26 12:26:39,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,886 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 171 flow. Second operand 3 states and 476 transitions. [2023-08-26 12:26:39,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 379 flow [2023-08-26 12:26:39,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 361 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:26:39,889 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 193 flow [2023-08-26 12:26:39,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-26 12:26:39,890 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -14 predicate places. [2023-08-26 12:26:39,891 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 193 flow [2023-08-26 12:26:39,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:39,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:39,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:39,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:26:39,891 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:39,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:39,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1217680047, now seen corresponding path program 1 times [2023-08-26 12:26:39,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:39,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438338310] [2023-08-26 12:26:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:39,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:40,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:40,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438338310] [2023-08-26 12:26:40,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438338310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:40,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:40,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:26:40,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732823263] [2023-08-26 12:26:40,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:40,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:26:40,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:40,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:26:40,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:26:40,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 375 [2023-08-26 12:26:40,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:40,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:40,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 375 [2023-08-26 12:26:40,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:40,473 INFO L124 PetriNetUnfolderBase]: 100/285 cut-off events. [2023-08-26 12:26:40,474 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-08-26 12:26:40,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 285 events. 100/285 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1465 event pairs, 57 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 829. Up to 220 conditions per place. [2023-08-26 12:26:40,476 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 42 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-26 12:26:40,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 51 transitions, 312 flow [2023-08-26 12:26:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:26:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:26:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-26 12:26:40,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30577777777777776 [2023-08-26 12:26:40,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-26 12:26:40,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-26 12:26:40,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:40,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-26 12:26:40,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:40,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:40,481 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:40,481 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 193 flow. Second operand 3 states and 344 transitions. [2023-08-26 12:26:40,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 51 transitions, 312 flow [2023-08-26 12:26:40,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:26:40,485 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 201 flow [2023-08-26 12:26:40,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2023-08-26 12:26:40,486 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -12 predicate places. [2023-08-26 12:26:40,486 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 201 flow [2023-08-26 12:26:40,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:40,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:40,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:40,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:26:40,487 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:40,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:40,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1217680048, now seen corresponding path program 1 times [2023-08-26 12:26:40,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:40,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258151418] [2023-08-26 12:26:40,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:40,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:40,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:40,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258151418] [2023-08-26 12:26:40,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258151418] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:40,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:40,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:26:40,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858371550] [2023-08-26 12:26:40,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:40,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:26:40,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:40,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:26:40,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:26:40,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 375 [2023-08-26 12:26:40,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:40,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:40,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 375 [2023-08-26 12:26:40,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:40,937 INFO L124 PetriNetUnfolderBase]: 107/294 cut-off events. [2023-08-26 12:26:40,937 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-08-26 12:26:40,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 294 events. 107/294 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1506 event pairs, 69 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 871. Up to 266 conditions per place. [2023-08-26 12:26:40,939 INFO L140 encePairwiseOnDemand]: 371/375 looper letters, 46 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-26 12:26:40,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 51 transitions, 327 flow [2023-08-26 12:26:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:26:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:26:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-08-26 12:26:40,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30666666666666664 [2023-08-26 12:26:40,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-08-26 12:26:40,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-08-26 12:26:40,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:40,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-08-26 12:26:40,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:40,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:40,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:40,945 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 201 flow. Second operand 3 states and 345 transitions. [2023-08-26 12:26:40,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 51 transitions, 327 flow [2023-08-26 12:26:40,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 51 transitions, 319 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:26:40,949 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 207 flow [2023-08-26 12:26:40,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=207, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-26 12:26:40,949 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -11 predicate places. [2023-08-26 12:26:40,949 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 207 flow [2023-08-26 12:26:40,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:40,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:40,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:40,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 12:26:40,950 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:40,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:40,950 INFO L85 PathProgramCache]: Analyzing trace with hash -729040182, now seen corresponding path program 1 times [2023-08-26 12:26:40,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:40,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800885929] [2023-08-26 12:26:40,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:40,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:42,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800885929] [2023-08-26 12:26:42,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800885929] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:42,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:42,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:26:42,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571316634] [2023-08-26 12:26:42,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:42,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:26:42,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:42,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:26:42,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:26:42,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 375 [2023-08-26 12:26:42,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 95.8) internal successors, (479), 5 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:42,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:42,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 375 [2023-08-26 12:26:42,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:42,484 INFO L124 PetriNetUnfolderBase]: 80/240 cut-off events. [2023-08-26 12:26:42,484 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-26 12:26:42,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 240 events. 80/240 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1159 event pairs, 32 based on Foata normal form. 6/230 useless extension candidates. Maximal degree in co-relation 738. Up to 128 conditions per place. [2023-08-26 12:26:42,486 INFO L140 encePairwiseOnDemand]: 369/375 looper letters, 48 selfloop transitions, 7 changer transitions 3/60 dead transitions. [2023-08-26 12:26:42,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 380 flow [2023-08-26 12:26:42,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:26:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:26:42,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 520 transitions. [2023-08-26 12:26:42,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2773333333333333 [2023-08-26 12:26:42,488 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 520 transitions. [2023-08-26 12:26:42,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 520 transitions. [2023-08-26 12:26:42,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:42,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 520 transitions. [2023-08-26 12:26:42,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:42,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:42,493 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:42,493 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 207 flow. Second operand 5 states and 520 transitions. [2023-08-26 12:26:42,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 380 flow [2023-08-26 12:26:42,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:26:42,496 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 211 flow [2023-08-26 12:26:42,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2023-08-26 12:26:42,496 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -9 predicate places. [2023-08-26 12:26:42,496 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 211 flow [2023-08-26 12:26:42,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.8) internal successors, (479), 5 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:42,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:42,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:42,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:26:42,497 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:42,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:42,497 INFO L85 PathProgramCache]: Analyzing trace with hash -729038114, now seen corresponding path program 1 times [2023-08-26 12:26:42,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:42,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151028818] [2023-08-26 12:26:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:42,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:43,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:43,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151028818] [2023-08-26 12:26:43,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151028818] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:43,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:43,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:26:43,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84979314] [2023-08-26 12:26:43,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:43,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:26:43,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:43,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:26:43,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:26:43,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 375 [2023-08-26 12:26:43,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 211 flow. Second operand has 6 states, 6 states have (on average 99.5) internal successors, (597), 6 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:43,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:43,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 375 [2023-08-26 12:26:43,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:43,324 INFO L124 PetriNetUnfolderBase]: 84/254 cut-off events. [2023-08-26 12:26:43,324 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-08-26 12:26:43,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 254 events. 84/254 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1246 event pairs, 50 based on Foata normal form. 6/243 useless extension candidates. Maximal degree in co-relation 812. Up to 143 conditions per place. [2023-08-26 12:26:43,326 INFO L140 encePairwiseOnDemand]: 368/375 looper letters, 46 selfloop transitions, 11 changer transitions 4/62 dead transitions. [2023-08-26 12:26:43,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 405 flow [2023-08-26 12:26:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:26:43,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:26:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 642 transitions. [2023-08-26 12:26:43,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2853333333333333 [2023-08-26 12:26:43,328 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 642 transitions. [2023-08-26 12:26:43,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 642 transitions. [2023-08-26 12:26:43,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:43,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 642 transitions. [2023-08-26 12:26:43,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:43,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:43,333 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:43,333 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 211 flow. Second operand 6 states and 642 transitions. [2023-08-26 12:26:43,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 405 flow [2023-08-26 12:26:43,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 389 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 12:26:43,336 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 229 flow [2023-08-26 12:26:43,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=229, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2023-08-26 12:26:43,336 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -7 predicate places. [2023-08-26 12:26:43,337 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 229 flow [2023-08-26 12:26:43,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.5) internal successors, (597), 6 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:43,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:43,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:43,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:26:43,337 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:43,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:43,338 INFO L85 PathProgramCache]: Analyzing trace with hash -729038115, now seen corresponding path program 1 times [2023-08-26 12:26:43,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:43,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585818973] [2023-08-26 12:26:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:43,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:43,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:43,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585818973] [2023-08-26 12:26:43,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585818973] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:43,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:43,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:26:43,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642453993] [2023-08-26 12:26:43,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:43,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:26:43,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:26:43,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:26:43,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 375 [2023-08-26 12:26:43,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 101.5) internal successors, (609), 6 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:43,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:43,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 375 [2023-08-26 12:26:43,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:44,312 INFO L124 PetriNetUnfolderBase]: 67/227 cut-off events. [2023-08-26 12:26:44,312 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2023-08-26 12:26:44,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 227 events. 67/227 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1130 event pairs, 43 based on Foata normal form. 5/231 useless extension candidates. Maximal degree in co-relation 764. Up to 134 conditions per place. [2023-08-26 12:26:44,314 INFO L140 encePairwiseOnDemand]: 370/375 looper letters, 38 selfloop transitions, 7 changer transitions 2/50 dead transitions. [2023-08-26 12:26:44,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 50 transitions, 351 flow [2023-08-26 12:26:44,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:26:44,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:26:44,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 438 transitions. [2023-08-26 12:26:44,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.292 [2023-08-26 12:26:44,316 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 438 transitions. [2023-08-26 12:26:44,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 438 transitions. [2023-08-26 12:26:44,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:44,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 438 transitions. [2023-08-26 12:26:44,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:44,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:44,320 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:44,320 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 229 flow. Second operand 4 states and 438 transitions. [2023-08-26 12:26:44,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 50 transitions, 351 flow [2023-08-26 12:26:44,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 336 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 12:26:44,322 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 237 flow [2023-08-26 12:26:44,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=60, PETRI_TRANSITIONS=41} [2023-08-26 12:26:44,322 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2023-08-26 12:26:44,323 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 237 flow [2023-08-26 12:26:44,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.5) internal successors, (609), 6 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:44,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:44,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:44,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 12:26:44,323 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:44,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:44,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1125411266, now seen corresponding path program 1 times [2023-08-26 12:26:44,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:44,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189348292] [2023-08-26 12:26:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:44,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:44,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:44,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189348292] [2023-08-26 12:26:44,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189348292] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:44,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:44,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:26:44,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012764948] [2023-08-26 12:26:44,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:44,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:26:44,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:44,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:26:44,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:26:44,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 375 [2023-08-26 12:26:44,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 90.66666666666667) internal successors, (544), 6 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:44,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:44,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 375 [2023-08-26 12:26:44,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:45,225 INFO L124 PetriNetUnfolderBase]: 53/191 cut-off events. [2023-08-26 12:26:45,225 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2023-08-26 12:26:45,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 714 conditions, 191 events. 53/191 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 885 event pairs, 8 based on Foata normal form. 16/199 useless extension candidates. Maximal degree in co-relation 698. Up to 102 conditions per place. [2023-08-26 12:26:45,226 INFO L140 encePairwiseOnDemand]: 365/375 looper letters, 55 selfloop transitions, 9 changer transitions 4/69 dead transitions. [2023-08-26 12:26:45,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 69 transitions, 471 flow [2023-08-26 12:26:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:26:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:26:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 689 transitions. [2023-08-26 12:26:45,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2624761904761905 [2023-08-26 12:26:45,229 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 689 transitions. [2023-08-26 12:26:45,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 689 transitions. [2023-08-26 12:26:45,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:45,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 689 transitions. [2023-08-26 12:26:45,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.42857142857143) internal successors, (689), 7 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:45,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 375.0) internal successors, (3000), 8 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:45,234 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 375.0) internal successors, (3000), 8 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:45,235 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 237 flow. Second operand 7 states and 689 transitions. [2023-08-26 12:26:45,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 69 transitions, 471 flow [2023-08-26 12:26:45,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 69 transitions, 455 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 12:26:45,237 INFO L231 Difference]: Finished difference. Result has 67 places, 42 transitions, 275 flow [2023-08-26 12:26:45,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=275, PETRI_PLACES=67, PETRI_TRANSITIONS=42} [2023-08-26 12:26:45,238 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2023-08-26 12:26:45,238 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 42 transitions, 275 flow [2023-08-26 12:26:45,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.66666666666667) internal successors, (544), 6 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:45,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:45,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:45,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 12:26:45,239 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:45,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:45,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1764327273, now seen corresponding path program 1 times [2023-08-26 12:26:45,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:45,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019819968] [2023-08-26 12:26:45,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:45,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:45,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019819968] [2023-08-26 12:26:45,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019819968] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:45,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:45,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:26:45,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647439329] [2023-08-26 12:26:45,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:45,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:26:45,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:45,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:26:45,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:26:45,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 375 [2023-08-26 12:26:45,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 42 transitions, 275 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:45,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:45,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 375 [2023-08-26 12:26:45,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:45,483 INFO L124 PetriNetUnfolderBase]: 53/182 cut-off events. [2023-08-26 12:26:45,483 INFO L125 PetriNetUnfolderBase]: For 378/378 co-relation queries the response was YES. [2023-08-26 12:26:45,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 182 events. 53/182 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 827 event pairs, 43 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 717. Up to 128 conditions per place. [2023-08-26 12:26:45,484 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 39 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2023-08-26 12:26:45,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 45 transitions, 372 flow [2023-08-26 12:26:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:26:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:26:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 428 transitions. [2023-08-26 12:26:45,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2853333333333333 [2023-08-26 12:26:45,487 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 428 transitions. [2023-08-26 12:26:45,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 428 transitions. [2023-08-26 12:26:45,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:45,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 428 transitions. [2023-08-26 12:26:45,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:45,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:45,491 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:45,491 INFO L175 Difference]: Start difference. First operand has 67 places, 42 transitions, 275 flow. Second operand 4 states and 428 transitions. [2023-08-26 12:26:45,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 45 transitions, 372 flow [2023-08-26 12:26:45,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 45 transitions, 331 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-26 12:26:45,494 INFO L231 Difference]: Finished difference. Result has 61 places, 41 transitions, 239 flow [2023-08-26 12:26:45,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=61, PETRI_TRANSITIONS=41} [2023-08-26 12:26:45,495 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -5 predicate places. [2023-08-26 12:26:45,495 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 41 transitions, 239 flow [2023-08-26 12:26:45,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:45,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:45,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:45,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 12:26:45,496 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:45,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:45,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1140561147, now seen corresponding path program 1 times [2023-08-26 12:26:45,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:45,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933944433] [2023-08-26 12:26:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:45,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:45,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:45,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933944433] [2023-08-26 12:26:45,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933944433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:45,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:45,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:26:45,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067071436] [2023-08-26 12:26:45,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:45,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:26:45,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:26:45,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:26:45,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 375 [2023-08-26 12:26:45,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 41 transitions, 239 flow. Second operand has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:45,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:45,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 375 [2023-08-26 12:26:45,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:46,635 INFO L124 PetriNetUnfolderBase]: 54/174 cut-off events. [2023-08-26 12:26:46,636 INFO L125 PetriNetUnfolderBase]: For 229/229 co-relation queries the response was YES. [2023-08-26 12:26:46,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 174 events. 54/174 cut-off events. For 229/229 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 725 event pairs, 25 based on Foata normal form. 4/175 useless extension candidates. Maximal degree in co-relation 626. Up to 133 conditions per place. [2023-08-26 12:26:46,637 INFO L140 encePairwiseOnDemand]: 366/375 looper letters, 41 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2023-08-26 12:26:46,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 408 flow [2023-08-26 12:26:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:26:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:26:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2023-08-26 12:26:46,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2342857142857143 [2023-08-26 12:26:46,640 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2023-08-26 12:26:46,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2023-08-26 12:26:46,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:46,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2023-08-26 12:26:46,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:46,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 375.0) internal successors, (3000), 8 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:46,645 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 375.0) internal successors, (3000), 8 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:46,645 INFO L175 Difference]: Start difference. First operand has 61 places, 41 transitions, 239 flow. Second operand 7 states and 615 transitions. [2023-08-26 12:26:46,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 408 flow [2023-08-26 12:26:46,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 55 transitions, 397 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 12:26:46,648 INFO L231 Difference]: Finished difference. Result has 66 places, 46 transitions, 305 flow [2023-08-26 12:26:46,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=305, PETRI_PLACES=66, PETRI_TRANSITIONS=46} [2023-08-26 12:26:46,649 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2023-08-26 12:26:46,649 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 46 transitions, 305 flow [2023-08-26 12:26:46,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:46,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:46,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:46,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 12:26:46,649 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:46,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:46,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1140429087, now seen corresponding path program 2 times [2023-08-26 12:26:46,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:46,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135806889] [2023-08-26 12:26:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:46,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:47,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:47,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135806889] [2023-08-26 12:26:47,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135806889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:47,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:47,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:26:47,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901978957] [2023-08-26 12:26:47,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:47,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:26:47,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:47,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:26:47,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:26:47,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 375 [2023-08-26 12:26:47,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 46 transitions, 305 flow. Second operand has 8 states, 8 states have (on average 82.5) internal successors, (660), 8 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:47,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:47,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 375 [2023-08-26 12:26:47,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:47,794 INFO L124 PetriNetUnfolderBase]: 54/172 cut-off events. [2023-08-26 12:26:47,795 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2023-08-26 12:26:47,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 693 conditions, 172 events. 54/172 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 708 event pairs, 25 based on Foata normal form. 2/171 useless extension candidates. Maximal degree in co-relation 675. Up to 125 conditions per place. [2023-08-26 12:26:47,796 INFO L140 encePairwiseOnDemand]: 367/375 looper letters, 39 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2023-08-26 12:26:47,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 54 transitions, 439 flow [2023-08-26 12:26:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 12:26:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 12:26:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 695 transitions. [2023-08-26 12:26:47,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23166666666666666 [2023-08-26 12:26:47,799 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 695 transitions. [2023-08-26 12:26:47,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 695 transitions. [2023-08-26 12:26:47,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:47,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 695 transitions. [2023-08-26 12:26:47,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 86.875) internal successors, (695), 8 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:47,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 375.0) internal successors, (3375), 9 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:47,804 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 375.0) internal successors, (3375), 9 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:47,804 INFO L175 Difference]: Start difference. First operand has 66 places, 46 transitions, 305 flow. Second operand 8 states and 695 transitions. [2023-08-26 12:26:47,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 54 transitions, 439 flow [2023-08-26 12:26:47,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 54 transitions, 421 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 12:26:47,808 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 309 flow [2023-08-26 12:26:47,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=309, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2023-08-26 12:26:47,809 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2023-08-26 12:26:47,809 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 309 flow [2023-08-26 12:26:47,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 82.5) internal successors, (660), 8 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:47,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:47,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:47,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 12:26:47,810 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:47,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:47,810 INFO L85 PathProgramCache]: Analyzing trace with hash -521580782, now seen corresponding path program 1 times [2023-08-26 12:26:47,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:47,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678498034] [2023-08-26 12:26:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:47,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:48,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:48,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678498034] [2023-08-26 12:26:48,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678498034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:48,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:48,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:26:48,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560540949] [2023-08-26 12:26:48,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:48,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:26:48,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:48,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:26:48,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:26:48,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 375 [2023-08-26 12:26:48,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 309 flow. Second operand has 8 states, 8 states have (on average 90.625) internal successors, (725), 8 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:48,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:48,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 375 [2023-08-26 12:26:48,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:49,141 INFO L124 PetriNetUnfolderBase]: 53/165 cut-off events. [2023-08-26 12:26:49,141 INFO L125 PetriNetUnfolderBase]: For 291/291 co-relation queries the response was YES. [2023-08-26 12:26:49,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 165 events. 53/165 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 669 event pairs, 11 based on Foata normal form. 3/165 useless extension candidates. Maximal degree in co-relation 669. Up to 53 conditions per place. [2023-08-26 12:26:49,142 INFO L140 encePairwiseOnDemand]: 367/375 looper letters, 44 selfloop transitions, 17 changer transitions 2/64 dead transitions. [2023-08-26 12:26:49,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 64 transitions, 502 flow [2023-08-26 12:26:49,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 12:26:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 12:26:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 763 transitions. [2023-08-26 12:26:49,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25433333333333336 [2023-08-26 12:26:49,145 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 763 transitions. [2023-08-26 12:26:49,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 763 transitions. [2023-08-26 12:26:49,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:49,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 763 transitions. [2023-08-26 12:26:49,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.375) internal successors, (763), 8 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:49,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 375.0) internal successors, (3375), 9 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:49,152 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 375.0) internal successors, (3375), 9 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:49,152 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 309 flow. Second operand 8 states and 763 transitions. [2023-08-26 12:26:49,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 64 transitions, 502 flow [2023-08-26 12:26:49,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 463 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-26 12:26:49,155 INFO L231 Difference]: Finished difference. Result has 67 places, 45 transitions, 314 flow [2023-08-26 12:26:49,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=67, PETRI_TRANSITIONS=45} [2023-08-26 12:26:49,156 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2023-08-26 12:26:49,156 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 45 transitions, 314 flow [2023-08-26 12:26:49,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 90.625) internal successors, (725), 8 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:49,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:49,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:49,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 12:26:49,157 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:49,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:49,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1251579537, now seen corresponding path program 1 times [2023-08-26 12:26:49,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:49,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012938496] [2023-08-26 12:26:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:49,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:50,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:50,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012938496] [2023-08-26 12:26:50,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012938496] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:50,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:50,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:26:50,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170473982] [2023-08-26 12:26:50,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:50,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:26:50,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:50,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:26:50,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:26:50,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 375 [2023-08-26 12:26:50,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 45 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 92.85714285714286) internal successors, (650), 7 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:50,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:50,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 375 [2023-08-26 12:26:50,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:50,521 INFO L124 PetriNetUnfolderBase]: 52/161 cut-off events. [2023-08-26 12:26:50,522 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2023-08-26 12:26:50,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 161 events. 52/161 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 647 event pairs, 13 based on Foata normal form. 3/163 useless extension candidates. Maximal degree in co-relation 667. Up to 65 conditions per place. [2023-08-26 12:26:50,523 INFO L140 encePairwiseOnDemand]: 369/375 looper letters, 42 selfloop transitions, 12 changer transitions 2/57 dead transitions. [2023-08-26 12:26:50,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 468 flow [2023-08-26 12:26:50,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:26:50,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:26:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 587 transitions. [2023-08-26 12:26:50,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2608888888888889 [2023-08-26 12:26:50,525 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 587 transitions. [2023-08-26 12:26:50,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 587 transitions. [2023-08-26 12:26:50,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:50,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 587 transitions. [2023-08-26 12:26:50,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.83333333333333) internal successors, (587), 6 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:50,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:50,530 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:50,530 INFO L175 Difference]: Start difference. First operand has 67 places, 45 transitions, 314 flow. Second operand 6 states and 587 transitions. [2023-08-26 12:26:50,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 468 flow [2023-08-26 12:26:50,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 432 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-26 12:26:50,533 INFO L231 Difference]: Finished difference. Result has 64 places, 44 transitions, 296 flow [2023-08-26 12:26:50,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=64, PETRI_TRANSITIONS=44} [2023-08-26 12:26:50,533 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-08-26 12:26:50,534 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 44 transitions, 296 flow [2023-08-26 12:26:50,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 92.85714285714286) internal successors, (650), 7 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:50,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:50,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:50,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 12:26:50,534 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:50,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:50,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1538111988, now seen corresponding path program 1 times [2023-08-26 12:26:50,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:50,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192515617] [2023-08-26 12:26:50,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:50,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:50,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:50,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192515617] [2023-08-26 12:26:50,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192515617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:50,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:50,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:26:50,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62869084] [2023-08-26 12:26:50,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:50,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:26:50,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:50,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:26:50,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:26:50,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 375 [2023-08-26 12:26:50,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 44 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:50,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:50,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 375 [2023-08-26 12:26:50,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:50,767 INFO L124 PetriNetUnfolderBase]: 52/159 cut-off events. [2023-08-26 12:26:50,768 INFO L125 PetriNetUnfolderBase]: For 323/323 co-relation queries the response was YES. [2023-08-26 12:26:50,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 159 events. 52/159 cut-off events. For 323/323 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 623 event pairs, 31 based on Foata normal form. 2/160 useless extension candidates. Maximal degree in co-relation 639. Up to 120 conditions per place. [2023-08-26 12:26:50,769 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 41 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2023-08-26 12:26:50,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 47 transitions, 398 flow [2023-08-26 12:26:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:26:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:26:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 423 transitions. [2023-08-26 12:26:50,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.282 [2023-08-26 12:26:50,771 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 423 transitions. [2023-08-26 12:26:50,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 423 transitions. [2023-08-26 12:26:50,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:50,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 423 transitions. [2023-08-26 12:26:50,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:50,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:50,774 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:50,774 INFO L175 Difference]: Start difference. First operand has 64 places, 44 transitions, 296 flow. Second operand 4 states and 423 transitions. [2023-08-26 12:26:50,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 47 transitions, 398 flow [2023-08-26 12:26:50,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 47 transitions, 375 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 12:26:50,777 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 279 flow [2023-08-26 12:26:50,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=279, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2023-08-26 12:26:50,777 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -4 predicate places. [2023-08-26 12:26:50,777 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 279 flow [2023-08-26 12:26:50,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:50,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:50,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:50,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 12:26:50,778 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:50,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:50,778 INFO L85 PathProgramCache]: Analyzing trace with hash -116377773, now seen corresponding path program 1 times [2023-08-26 12:26:50,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:50,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559026361] [2023-08-26 12:26:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:50,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:50,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:50,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559026361] [2023-08-26 12:26:50,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559026361] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:50,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:50,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:26:50,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673274066] [2023-08-26 12:26:50,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:50,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:26:50,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:50,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:26:50,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:26:50,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 375 [2023-08-26 12:26:50,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 279 flow. Second operand has 5 states, 5 states have (on average 140.8) internal successors, (704), 5 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:50,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:50,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 375 [2023-08-26 12:26:50,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:51,080 INFO L124 PetriNetUnfolderBase]: 36/139 cut-off events. [2023-08-26 12:26:51,080 INFO L125 PetriNetUnfolderBase]: For 268/269 co-relation queries the response was YES. [2023-08-26 12:26:51,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 139 events. 36/139 cut-off events. For 268/269 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 554 event pairs, 5 based on Foata normal form. 5/144 useless extension candidates. Maximal degree in co-relation 541. Up to 67 conditions per place. [2023-08-26 12:26:51,081 INFO L140 encePairwiseOnDemand]: 370/375 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2023-08-26 12:26:51,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 433 flow [2023-08-26 12:26:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:26:51,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:26:51,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 583 transitions. [2023-08-26 12:26:51,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38866666666666666 [2023-08-26 12:26:51,083 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 583 transitions. [2023-08-26 12:26:51,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 583 transitions. [2023-08-26 12:26:51,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:51,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 583 transitions. [2023-08-26 12:26:51,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:51,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:51,087 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:51,087 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 279 flow. Second operand 4 states and 583 transitions. [2023-08-26 12:26:51,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 433 flow [2023-08-26 12:26:51,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 53 transitions, 424 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 12:26:51,090 INFO L231 Difference]: Finished difference. Result has 63 places, 43 transitions, 285 flow [2023-08-26 12:26:51,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=63, PETRI_TRANSITIONS=43} [2023-08-26 12:26:51,091 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2023-08-26 12:26:51,091 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 43 transitions, 285 flow [2023-08-26 12:26:51,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.8) internal successors, (704), 5 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:51,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:51,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:51,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 12:26:51,091 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:51,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash -593432874, now seen corresponding path program 1 times [2023-08-26 12:26:51,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:51,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930899518] [2023-08-26 12:26:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:51,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:51,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:51,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930899518] [2023-08-26 12:26:51,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930899518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:51,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:51,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 12:26:51,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073198415] [2023-08-26 12:26:51,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:51,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 12:26:51,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:51,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 12:26:51,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-26 12:26:51,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 375 [2023-08-26 12:26:51,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 43 transitions, 285 flow. Second operand has 9 states, 9 states have (on average 79.88888888888889) internal successors, (719), 9 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:51,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:51,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 375 [2023-08-26 12:26:51,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:52,224 INFO L124 PetriNetUnfolderBase]: 41/139 cut-off events. [2023-08-26 12:26:52,224 INFO L125 PetriNetUnfolderBase]: For 232/232 co-relation queries the response was YES. [2023-08-26 12:26:52,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 139 events. 41/139 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 511 event pairs, 3 based on Foata normal form. 2/140 useless extension candidates. Maximal degree in co-relation 584. Up to 60 conditions per place. [2023-08-26 12:26:52,225 INFO L140 encePairwiseOnDemand]: 366/375 looper letters, 48 selfloop transitions, 14 changer transitions 3/66 dead transitions. [2023-08-26 12:26:52,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 521 flow [2023-08-26 12:26:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 12:26:52,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 12:26:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 758 transitions. [2023-08-26 12:26:52,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2245925925925926 [2023-08-26 12:26:52,228 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 758 transitions. [2023-08-26 12:26:52,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 758 transitions. [2023-08-26 12:26:52,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:52,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 758 transitions. [2023-08-26 12:26:52,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 84.22222222222223) internal successors, (758), 9 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:52,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:52,234 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:52,234 INFO L175 Difference]: Start difference. First operand has 63 places, 43 transitions, 285 flow. Second operand 9 states and 758 transitions. [2023-08-26 12:26:52,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 521 flow [2023-08-26 12:26:52,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 509 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:26:52,237 INFO L231 Difference]: Finished difference. Result has 69 places, 43 transitions, 315 flow [2023-08-26 12:26:52,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=315, PETRI_PLACES=69, PETRI_TRANSITIONS=43} [2023-08-26 12:26:52,238 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-08-26 12:26:52,238 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 43 transitions, 315 flow [2023-08-26 12:26:52,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 79.88888888888889) internal successors, (719), 9 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:52,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:52,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:52,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 12:26:52,238 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:52,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:52,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1647068576, now seen corresponding path program 2 times [2023-08-26 12:26:52,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:52,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257223267] [2023-08-26 12:26:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:52,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:52,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:52,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257223267] [2023-08-26 12:26:52,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257223267] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:52,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:52,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 12:26:52,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924652435] [2023-08-26 12:26:52,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:52,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 12:26:52,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:52,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 12:26:52,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 12:26:52,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 375 [2023-08-26 12:26:52,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 43 transitions, 315 flow. Second operand has 9 states, 9 states have (on average 79.88888888888889) internal successors, (719), 9 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:52,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:52,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 375 [2023-08-26 12:26:52,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:53,304 INFO L124 PetriNetUnfolderBase]: 41/136 cut-off events. [2023-08-26 12:26:53,304 INFO L125 PetriNetUnfolderBase]: For 316/316 co-relation queries the response was YES. [2023-08-26 12:26:53,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 136 events. 41/136 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 493 event pairs, 3 based on Foata normal form. 1/136 useless extension candidates. Maximal degree in co-relation 596. Up to 37 conditions per place. [2023-08-26 12:26:53,305 INFO L140 encePairwiseOnDemand]: 367/375 looper letters, 41 selfloop transitions, 14 changer transitions 12/68 dead transitions. [2023-08-26 12:26:53,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 68 transitions, 545 flow [2023-08-26 12:26:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 12:26:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 12:26:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 837 transitions. [2023-08-26 12:26:53,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2232 [2023-08-26 12:26:53,308 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 837 transitions. [2023-08-26 12:26:53,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 837 transitions. [2023-08-26 12:26:53,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:53,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 837 transitions. [2023-08-26 12:26:53,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 83.7) internal successors, (837), 10 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:53,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 375.0) internal successors, (4125), 11 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:53,313 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 375.0) internal successors, (4125), 11 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:53,313 INFO L175 Difference]: Start difference. First operand has 69 places, 43 transitions, 315 flow. Second operand 10 states and 837 transitions. [2023-08-26 12:26:53,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 68 transitions, 545 flow [2023-08-26 12:26:53,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 68 transitions, 529 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-26 12:26:53,317 INFO L231 Difference]: Finished difference. Result has 73 places, 39 transitions, 295 flow [2023-08-26 12:26:53,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=295, PETRI_PLACES=73, PETRI_TRANSITIONS=39} [2023-08-26 12:26:53,317 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2023-08-26 12:26:53,317 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 39 transitions, 295 flow [2023-08-26 12:26:53,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 79.88888888888889) internal successors, (719), 9 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:53,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:53,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:53,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 12:26:53,318 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:53,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:53,318 INFO L85 PathProgramCache]: Analyzing trace with hash 371511957, now seen corresponding path program 1 times [2023-08-26 12:26:53,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:53,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73297429] [2023-08-26 12:26:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:53,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:53,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:53,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73297429] [2023-08-26 12:26:53,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73297429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:53,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:53,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:26:53,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214218188] [2023-08-26 12:26:53,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:53,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:26:53,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:53,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:26:53,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:26:53,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 375 [2023-08-26 12:26:53,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 39 transitions, 295 flow. Second operand has 8 states, 8 states have (on average 91.125) internal successors, (729), 8 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:53,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:53,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 375 [2023-08-26 12:26:53,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:54,158 INFO L124 PetriNetUnfolderBase]: 32/110 cut-off events. [2023-08-26 12:26:54,158 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2023-08-26 12:26:54,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 110 events. 32/110 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 372 event pairs, 11 based on Foata normal form. 1/110 useless extension candidates. Maximal degree in co-relation 478. Up to 39 conditions per place. [2023-08-26 12:26:54,159 INFO L140 encePairwiseOnDemand]: 368/375 looper letters, 34 selfloop transitions, 14 changer transitions 0/49 dead transitions. [2023-08-26 12:26:54,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 49 transitions, 425 flow [2023-08-26 12:26:54,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 12:26:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 12:26:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 930 transitions. [2023-08-26 12:26:54,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.248 [2023-08-26 12:26:54,161 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 930 transitions. [2023-08-26 12:26:54,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 930 transitions. [2023-08-26 12:26:54,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:54,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 930 transitions. [2023-08-26 12:26:54,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 93.0) internal successors, (930), 10 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:54,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 375.0) internal successors, (4125), 11 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:54,166 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 375.0) internal successors, (4125), 11 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:54,166 INFO L175 Difference]: Start difference. First operand has 73 places, 39 transitions, 295 flow. Second operand 10 states and 930 transitions. [2023-08-26 12:26:54,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 49 transitions, 425 flow [2023-08-26 12:26:54,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 49 transitions, 365 flow, removed 1 selfloop flow, removed 13 redundant places. [2023-08-26 12:26:54,169 INFO L231 Difference]: Finished difference. Result has 67 places, 38 transitions, 257 flow [2023-08-26 12:26:54,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=257, PETRI_PLACES=67, PETRI_TRANSITIONS=38} [2023-08-26 12:26:54,169 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2023-08-26 12:26:54,170 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 38 transitions, 257 flow [2023-08-26 12:26:54,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 91.125) internal successors, (729), 8 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:54,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:54,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:54,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 12:26:54,170 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:54,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:54,171 INFO L85 PathProgramCache]: Analyzing trace with hash 371511956, now seen corresponding path program 1 times [2023-08-26 12:26:54,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:54,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967555531] [2023-08-26 12:26:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:54,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:54,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:54,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967555531] [2023-08-26 12:26:54,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967555531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:54,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:54,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:26:54,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349843827] [2023-08-26 12:26:54,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:54,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:26:54,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:54,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:26:54,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:26:54,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 375 [2023-08-26 12:26:54,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 38 transitions, 257 flow. Second operand has 8 states, 8 states have (on average 93.125) internal successors, (745), 8 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:54,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:54,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 375 [2023-08-26 12:26:54,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:55,498 INFO L124 PetriNetUnfolderBase]: 32/109 cut-off events. [2023-08-26 12:26:55,498 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2023-08-26 12:26:55,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 109 events. 32/109 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 375 event pairs, 12 based on Foata normal form. 1/109 useless extension candidates. Maximal degree in co-relation 437. Up to 45 conditions per place. [2023-08-26 12:26:55,499 INFO L140 encePairwiseOnDemand]: 369/375 looper letters, 20 selfloop transitions, 7 changer transitions 17/45 dead transitions. [2023-08-26 12:26:55,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 45 transitions, 368 flow [2023-08-26 12:26:55,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:26:55,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:26:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 578 transitions. [2023-08-26 12:26:55,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2568888888888889 [2023-08-26 12:26:55,501 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 578 transitions. [2023-08-26 12:26:55,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 578 transitions. [2023-08-26 12:26:55,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:55,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 578 transitions. [2023-08-26 12:26:55,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.33333333333333) internal successors, (578), 6 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:55,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:55,504 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:55,504 INFO L175 Difference]: Start difference. First operand has 67 places, 38 transitions, 257 flow. Second operand 6 states and 578 transitions. [2023-08-26 12:26:55,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 45 transitions, 368 flow [2023-08-26 12:26:55,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 45 transitions, 330 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-26 12:26:55,506 INFO L231 Difference]: Finished difference. Result has 61 places, 27 transitions, 172 flow [2023-08-26 12:26:55,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=61, PETRI_TRANSITIONS=27} [2023-08-26 12:26:55,507 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -5 predicate places. [2023-08-26 12:26:55,507 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 27 transitions, 172 flow [2023-08-26 12:26:55,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 93.125) internal successors, (745), 8 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:55,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:55,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:55,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-26 12:26:55,508 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:55,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash 358477926, now seen corresponding path program 3 times [2023-08-26 12:26:55,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:55,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410686120] [2023-08-26 12:26:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:55,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:56,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:56,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410686120] [2023-08-26 12:26:56,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410686120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:56,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:56,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 12:26:56,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930561281] [2023-08-26 12:26:56,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:56,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 12:26:56,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:56,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 12:26:56,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-26 12:26:56,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 375 [2023-08-26 12:26:56,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 27 transitions, 172 flow. Second operand has 9 states, 9 states have (on average 79.88888888888889) internal successors, (719), 9 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:56,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:56,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 375 [2023-08-26 12:26:56,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:56,517 INFO L124 PetriNetUnfolderBase]: 10/56 cut-off events. [2023-08-26 12:26:56,517 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-08-26 12:26:56,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 56 events. 10/56 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 1/56 useless extension candidates. Maximal degree in co-relation 249. Up to 15 conditions per place. [2023-08-26 12:26:56,517 INFO L140 encePairwiseOnDemand]: 367/375 looper letters, 16 selfloop transitions, 5 changer transitions 14/36 dead transitions. [2023-08-26 12:26:56,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 36 transitions, 286 flow [2023-08-26 12:26:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 12:26:56,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 12:26:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 734 transitions. [2023-08-26 12:26:56,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21748148148148147 [2023-08-26 12:26:56,519 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 734 transitions. [2023-08-26 12:26:56,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 734 transitions. [2023-08-26 12:26:56,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:56,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 734 transitions. [2023-08-26 12:26:56,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.55555555555556) internal successors, (734), 9 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:56,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:56,524 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:56,524 INFO L175 Difference]: Start difference. First operand has 61 places, 27 transitions, 172 flow. Second operand 9 states and 734 transitions. [2023-08-26 12:26:56,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 36 transitions, 286 flow [2023-08-26 12:26:56,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 36 transitions, 235 flow, removed 1 selfloop flow, removed 13 redundant places. [2023-08-26 12:26:56,526 INFO L231 Difference]: Finished difference. Result has 52 places, 20 transitions, 104 flow [2023-08-26 12:26:56,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=104, PETRI_PLACES=52, PETRI_TRANSITIONS=20} [2023-08-26 12:26:56,526 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -14 predicate places. [2023-08-26 12:26:56,526 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 20 transitions, 104 flow [2023-08-26 12:26:56,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 79.88888888888889) internal successors, (719), 9 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:56,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:56,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:56,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 12:26:56,527 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-08-26 12:26:56,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:56,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1892073950, now seen corresponding path program 4 times [2023-08-26 12:26:56,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:56,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540880890] [2023-08-26 12:26:56,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:56,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:57,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:57,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540880890] [2023-08-26 12:26:57,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540880890] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:26:57,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:26:57,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 12:26:57,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651340772] [2023-08-26 12:26:57,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:26:57,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 12:26:57,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:57,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 12:26:57,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-26 12:26:57,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 375 [2023-08-26 12:26:57,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 20 transitions, 104 flow. Second operand has 11 states, 11 states have (on average 79.54545454545455) internal successors, (875), 11 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:57,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:57,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 375 [2023-08-26 12:26:57,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:57,610 INFO L124 PetriNetUnfolderBase]: 3/29 cut-off events. [2023-08-26 12:26:57,611 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-08-26 12:26:57,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 29 events. 3/29 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 118. Up to 7 conditions per place. [2023-08-26 12:26:57,611 INFO L140 encePairwiseOnDemand]: 366/375 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2023-08-26 12:26:57,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 21 transitions, 148 flow [2023-08-26 12:26:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 12:26:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 12:26:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 721 transitions. [2023-08-26 12:26:57,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21362962962962964 [2023-08-26 12:26:57,612 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 721 transitions. [2023-08-26 12:26:57,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 721 transitions. [2023-08-26 12:26:57,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:57,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 721 transitions. [2023-08-26 12:26:57,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.11111111111111) internal successors, (721), 9 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:57,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:57,616 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:57,616 INFO L175 Difference]: Start difference. First operand has 52 places, 20 transitions, 104 flow. Second operand 9 states and 721 transitions. [2023-08-26 12:26:57,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 21 transitions, 148 flow [2023-08-26 12:26:57,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 21 transitions, 110 flow, removed 1 selfloop flow, removed 14 redundant places. [2023-08-26 12:26:57,617 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-26 12:26:57,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-26 12:26:57,617 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -27 predicate places. [2023-08-26 12:26:57,617 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-26 12:26:57,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 79.54545454545455) internal successors, (875), 11 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:57,620 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 55 remaining) [2023-08-26 12:26:57,620 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 55 remaining) [2023-08-26 12:26:57,621 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 55 remaining) [2023-08-26 12:26:57,621 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 55 remaining) [2023-08-26 12:26:57,621 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 55 remaining) [2023-08-26 12:26:57,621 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 55 remaining) [2023-08-26 12:26:57,621 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 55 remaining) [2023-08-26 12:26:57,621 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 55 remaining) [2023-08-26 12:26:57,621 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 55 remaining) [2023-08-26 12:26:57,621 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 55 remaining) [2023-08-26 12:26:57,621 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 55 remaining) [2023-08-26 12:26:57,622 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 55 remaining) [2023-08-26 12:26:57,622 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 55 remaining) [2023-08-26 12:26:57,622 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 55 remaining) [2023-08-26 12:26:57,622 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 55 remaining) [2023-08-26 12:26:57,622 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 55 remaining) [2023-08-26 12:26:57,622 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 55 remaining) [2023-08-26 12:26:57,622 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 55 remaining) [2023-08-26 12:26:57,622 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 55 remaining) [2023-08-26 12:26:57,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 55 remaining) [2023-08-26 12:26:57,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 55 remaining) [2023-08-26 12:26:57,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 55 remaining) [2023-08-26 12:26:57,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 55 remaining) [2023-08-26 12:26:57,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 55 remaining) [2023-08-26 12:26:57,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 55 remaining) [2023-08-26 12:26:57,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 55 remaining) [2023-08-26 12:26:57,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 55 remaining) [2023-08-26 12:26:57,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 55 remaining) [2023-08-26 12:26:57,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 55 remaining) [2023-08-26 12:26:57,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 55 remaining) [2023-08-26 12:26:57,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 55 remaining) [2023-08-26 12:26:57,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 55 remaining) [2023-08-26 12:26:57,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 55 remaining) [2023-08-26 12:26:57,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 55 remaining) [2023-08-26 12:26:57,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 55 remaining) [2023-08-26 12:26:57,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 55 remaining) [2023-08-26 12:26:57,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 55 remaining) [2023-08-26 12:26:57,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 55 remaining) [2023-08-26 12:26:57,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 55 remaining) [2023-08-26 12:26:57,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 55 remaining) [2023-08-26 12:26:57,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 55 remaining) [2023-08-26 12:26:57,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 55 remaining) [2023-08-26 12:26:57,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 55 remaining) [2023-08-26 12:26:57,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 55 remaining) [2023-08-26 12:26:57,626 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 55 remaining) [2023-08-26 12:26:57,626 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 55 remaining) [2023-08-26 12:26:57,626 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 55 remaining) [2023-08-26 12:26:57,626 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 55 remaining) [2023-08-26 12:26:57,626 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 55 remaining) [2023-08-26 12:26:57,626 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 55 remaining) [2023-08-26 12:26:57,626 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 55 remaining) [2023-08-26 12:26:57,626 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 55 remaining) [2023-08-26 12:26:57,626 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 55 remaining) [2023-08-26 12:26:57,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 55 remaining) [2023-08-26 12:26:57,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 55 remaining) [2023-08-26 12:26:57,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 12:26:57,627 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:57,631 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 12:26:57,632 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:26:57,634 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:26:57 BasicIcfg [2023-08-26 12:26:57,634 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:26:57,635 INFO L158 Benchmark]: Toolchain (without parser) took 177007.16ms. Allocated memory was 364.9MB in the beginning and 545.3MB in the end (delta: 180.4MB). Free memory was 337.9MB in the beginning and 244.8MB in the end (delta: 93.1MB). Peak memory consumption was 276.6MB. Max. memory is 16.0GB. [2023-08-26 12:26:57,635 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 364.9MB. Free memory was 342.1MB in the beginning and 342.1MB in the end (delta: 17.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:26:57,635 INFO L158 Benchmark]: CACSL2BoogieTranslator took 664.23ms. Allocated memory is still 364.9MB. Free memory was 337.9MB in the beginning and 299.2MB in the end (delta: 38.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.0GB. [2023-08-26 12:26:57,635 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.13ms. Allocated memory is still 364.9MB. Free memory was 299.2MB in the beginning and 297.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:26:57,636 INFO L158 Benchmark]: Boogie Preprocessor took 51.49ms. Allocated memory is still 364.9MB. Free memory was 297.1MB in the beginning and 295.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:26:57,636 INFO L158 Benchmark]: RCFGBuilder took 644.58ms. Allocated memory is still 364.9MB. Free memory was 295.0MB in the beginning and 269.9MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-26 12:26:57,636 INFO L158 Benchmark]: TraceAbstraction took 175577.43ms. Allocated memory was 364.9MB in the beginning and 545.3MB in the end (delta: 180.4MB). Free memory was 269.9MB in the beginning and 244.8MB in the end (delta: 25.1MB). Peak memory consumption was 207.4MB. Max. memory is 16.0GB. [2023-08-26 12:26:57,637 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 364.9MB. Free memory was 342.1MB in the beginning and 342.1MB in the end (delta: 17.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 664.23ms. Allocated memory is still 364.9MB. Free memory was 337.9MB in the beginning and 299.2MB in the end (delta: 38.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 62.13ms. Allocated memory is still 364.9MB. Free memory was 299.2MB in the beginning and 297.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 51.49ms. Allocated memory is still 364.9MB. Free memory was 297.1MB in the beginning and 295.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 644.58ms. Allocated memory is still 364.9MB. Free memory was 295.0MB in the beginning and 269.9MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 175577.43ms. Allocated memory was 364.9MB in the beginning and 545.3MB in the end (delta: 180.4MB). Free memory was 269.9MB in the beginning and 244.8MB in the end (delta: 25.1MB). Peak memory consumption was 207.4MB. 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: 151.7s, 162 PlacesBefore, 66 PlacesAfterwards, 158 TransitionsBefore, 62 TransitionsAfterwards, 2310 CoEnabledTransitionPairs, 9 FixpointIterations, 158 TrivialSequentialCompositions, 58 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 216 TotalNumberOfCompositions, 12363 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5854, independent: 5299, independent conditional: 0, independent unconditional: 5299, dependent: 555, dependent conditional: 0, dependent unconditional: 555, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1370, independent: 1308, independent conditional: 0, independent unconditional: 1308, dependent: 62, dependent conditional: 0, dependent unconditional: 62, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5854, independent: 3991, independent conditional: 0, independent unconditional: 3991, dependent: 493, dependent conditional: 0, dependent unconditional: 493, unknown: 1370, unknown conditional: 0, unknown unconditional: 1370] , Statistics on independence cache: Total cache size (in pairs): 214, Positive cache size: 183, Positive conditional cache size: 0, Positive unconditional cache size: 183, Negative cache size: 31, Negative conditional cache size: 0, Negative unconditional cache size: 31, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 197 locations, 55 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 175.4s, OverallIterations: 28, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 9.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 151.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 829 SdHoareTripleChecker+Valid, 6.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 829 mSDsluCounter, 62 SdHoareTripleChecker+Invalid, 6.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 13 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2407 IncrementalHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 49 mSDtfsCounter, 2407 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=315occurred in iteration=23, InterpolantAutomatonStates: 150, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 13.1s InterpolantComputationTime, 301 NumberOfCodeBlocks, 301 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 273 ConstructedInterpolants, 0 QuantifiedInterpolants, 6212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 42 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 12:26:57,658 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...