/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:03:20,564 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:03:20,605 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 20:03:20,608 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:03:20,608 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:03:20,642 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:03:20,643 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:03:20,643 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:03:20,643 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:03:20,644 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:03:20,644 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:03:20,644 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:03:20,644 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:03:20,645 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:03:20,645 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:03:20,645 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:03:20,645 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:03:20,645 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:03:20,646 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:03:20,646 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:03:20,646 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:03:20,651 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:03:20,652 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:03:20,652 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:03:20,652 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:03:20,652 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:03:20,652 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:03:20,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:03:20,653 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:03:20,653 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:03:20,653 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:03:20,654 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:03:20,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:03:20,654 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:03:20,654 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:03:20,654 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 20:03:20,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:03:20,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:03:20,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:03:20,922 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:03:20,924 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:03:20,925 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c [2023-08-26 20:03:21,998 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:03:22,186 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:03:22,186 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c [2023-08-26 20:03:22,193 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2980af0d/c8fa6cd4f1f7422bb982a943fbcf47b8/FLAG584bf9bb3 [2023-08-26 20:03:22,209 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2980af0d/c8fa6cd4f1f7422bb982a943fbcf47b8 [2023-08-26 20:03:22,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:03:22,214 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:03:22,216 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:03:22,216 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:03:22,218 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:03:22,219 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:03:22" (1/1) ... [2023-08-26 20:03:22,219 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ca1a277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:22, skipping insertion in model container [2023-08-26 20:03:22,219 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:03:22" (1/1) ... [2023-08-26 20:03:22,247 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:03:22,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:03:22,418 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:03:22,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:03:22,472 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:03:22,472 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:03:22,477 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:03:22,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:22 WrapperNode [2023-08-26 20:03:22,478 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:03:22,478 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:03:22,478 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:03:22,478 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:03:22,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:22" (1/1) ... [2023-08-26 20:03:22,504 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:22" (1/1) ... [2023-08-26 20:03:22,525 INFO L138 Inliner]: procedures = 26, calls = 116, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 331 [2023-08-26 20:03:22,525 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:03:22,525 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:03:22,526 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:03:22,526 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:03:22,532 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:22" (1/1) ... [2023-08-26 20:03:22,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:22" (1/1) ... [2023-08-26 20:03:22,540 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:22" (1/1) ... [2023-08-26 20:03:22,540 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:22" (1/1) ... [2023-08-26 20:03:22,551 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:22" (1/1) ... [2023-08-26 20:03:22,553 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:22" (1/1) ... [2023-08-26 20:03:22,554 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:22" (1/1) ... [2023-08-26 20:03:22,555 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:22" (1/1) ... [2023-08-26 20:03:22,557 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:03:22,558 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:03:22,558 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:03:22,558 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:03:22,559 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:22" (1/1) ... [2023-08-26 20:03:22,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:03:22,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:03:22,593 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 20:03:22,602 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 20:03:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:03:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:03:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:03:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 20:03:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 20:03:22,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 20:03:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 20:03:22,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 20:03:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 20:03:22,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 20:03:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-26 20:03:22,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-26 20:03:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:03:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-26 20:03:22,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-26 20:03:22,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-26 20:03:22,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-26 20:03:22,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread7 [2023-08-26 20:03:22,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread7 [2023-08-26 20:03:22,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 20:03:22,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 20:03:22,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:03:22,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:03:22,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:03:22,624 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 20:03:22,698 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:03:22,699 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:03:23,036 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:03:23,113 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:03:23,114 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 20:03:23,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:03:23 BoogieIcfgContainer [2023-08-26 20:03:23,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:03:23,118 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:03:23,119 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:03:23,121 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:03:23,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:03:22" (1/3) ... [2023-08-26 20:03:23,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3b37d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:03:23, skipping insertion in model container [2023-08-26 20:03:23,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:22" (2/3) ... [2023-08-26 20:03:23,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3b37d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:03:23, skipping insertion in model container [2023-08-26 20:03:23,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:03:23" (3/3) ... [2023-08-26 20:03:23,123 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-7.wvr.c [2023-08-26 20:03:23,135 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:03:23,135 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2023-08-26 20:03:23,135 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:03:23,223 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-26 20:03:23,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 244 transitions, 544 flow [2023-08-26 20:03:23,355 INFO L124 PetriNetUnfolderBase]: 2/237 cut-off events. [2023-08-26 20:03:23,355 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 20:03:23,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 237 events. 2/237 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 186 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 178. Up to 2 conditions per place. [2023-08-26 20:03:23,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 244 transitions, 544 flow [2023-08-26 20:03:23,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 218 transitions, 478 flow [2023-08-26 20:03:23,369 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:03:23,378 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 218 transitions, 478 flow [2023-08-26 20:03:23,381 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 218 transitions, 478 flow [2023-08-26 20:03:23,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 218 transitions, 478 flow [2023-08-26 20:03:23,458 INFO L124 PetriNetUnfolderBase]: 2/218 cut-off events. [2023-08-26 20:03:23,459 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 20:03:23,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 218 events. 2/218 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 186 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 178. Up to 2 conditions per place. [2023-08-26 20:03:23,462 INFO L119 LiptonReduction]: Number of co-enabled transitions 5386 [2023-08-26 20:03:32,309 INFO L134 LiptonReduction]: Checked pairs total: 30503 [2023-08-26 20:03:32,309 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-08-26 20:03:32,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:03:32,323 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;@323eb6c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:03:32,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-08-26 20:03:32,324 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:03:32,324 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 20:03:32,324 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:03:32,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:03:32,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 20:03:32,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:03:32,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:03:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash 944, now seen corresponding path program 1 times [2023-08-26 20:03:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:03:32,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476834138] [2023-08-26 20:03:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:03:32,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:03:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:03:32,409 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 20:03:32,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:03:32,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476834138] [2023-08-26 20:03:32,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476834138] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:03:32,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:03:32,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 20:03:32,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102037342] [2023-08-26 20:03:32,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:03:32,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 20:03:32,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:03:32,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 20:03:32,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 20:03:32,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 429 [2023-08-26 20:03:32,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 86 transitions, 214 flow. Second operand has 2 states, 2 states have (on average 206.5) internal successors, (413), 2 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:03:32,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:03:32,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 429 [2023-08-26 20:03:32,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:04:06,371 INFO L124 PetriNetUnfolderBase]: 513369/645736 cut-off events. [2023-08-26 20:04:06,371 INFO L125 PetriNetUnfolderBase]: For 13587/13587 co-relation queries the response was YES. [2023-08-26 20:04:08,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284716 conditions, 645736 events. 513369/645736 cut-off events. For 13587/13587 co-relation queries the response was YES. Maximal size of possible extension queue 20246. Compared 4210989 event pairs, 513369 based on Foata normal form. 0/585859 useless extension candidates. Maximal degree in co-relation 1049868. Up to 622589 conditions per place. [2023-08-26 20:04:10,500 INFO L140 encePairwiseOnDemand]: 427/429 looper letters, 76 selfloop transitions, 0 changer transitions 0/84 dead transitions. [2023-08-26 20:04:10,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 84 transitions, 362 flow [2023-08-26 20:04:10,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 20:04:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 20:04:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 490 transitions. [2023-08-26 20:04:10,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710955710955711 [2023-08-26 20:04:10,510 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 490 transitions. [2023-08-26 20:04:10,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 490 transitions. [2023-08-26 20:04:10,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:04:10,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 490 transitions. [2023-08-26 20:04:10,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 245.0) internal successors, (490), 2 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:04:10,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 429.0) internal successors, (1287), 3 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:04:10,520 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 429.0) internal successors, (1287), 3 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:04:10,521 INFO L175 Difference]: Start difference. First operand has 108 places, 86 transitions, 214 flow. Second operand 2 states and 490 transitions. [2023-08-26 20:04:10,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 84 transitions, 362 flow [2023-08-26 20:04:12,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 84 transitions, 334 flow, removed 0 selfloop flow, removed 14 redundant places. [2023-08-26 20:04:12,127 INFO L231 Difference]: Finished difference. Result has 93 places, 84 transitions, 182 flow [2023-08-26 20:04:12,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=93, PETRI_TRANSITIONS=84} [2023-08-26 20:04:12,131 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -15 predicate places. [2023-08-26 20:04:12,131 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 182 flow [2023-08-26 20:04:12,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 206.5) internal successors, (413), 2 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:04:12,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:04:12,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:04:12,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 20:04:12,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:04:12,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:04:12,138 INFO L85 PathProgramCache]: Analyzing trace with hash 932200, now seen corresponding path program 1 times [2023-08-26 20:04:12,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:04:12,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919491592] [2023-08-26 20:04:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:04:12,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:04:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:04:12,615 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 20:04:12,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:04:12,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919491592] [2023-08-26 20:04:12,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919491592] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:04:12,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:04:12,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:04:12,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278176465] [2023-08-26 20:04:12,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:04:12,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:04:12,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:04:12,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:04:12,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:04:12,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 429 [2023-08-26 20:04:12,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:04:12,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:04:12,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 429 [2023-08-26 20:04:12,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:04:42,484 INFO L124 PetriNetUnfolderBase]: 494934/623199 cut-off events. [2023-08-26 20:04:42,485 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-26 20:04:43,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1228716 conditions, 623199 events. 494934/623199 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 20000. Compared 4067599 event pairs, 494934 based on Foata normal form. 0/567422 useless extension candidates. Maximal degree in co-relation 1228713. Up to 600053 conditions per place. [2023-08-26 20:04:46,068 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 73 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-26 20:04:46,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 82 transitions, 326 flow [2023-08-26 20:04:46,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:04:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:04:46,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2023-08-26 20:04:46,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44133644133644134 [2023-08-26 20:04:46,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2023-08-26 20:04:46,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2023-08-26 20:04:46,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:04:46,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2023-08-26 20:04:46,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:04:46,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:04:46,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:04:46,081 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 182 flow. Second operand 3 states and 568 transitions. [2023-08-26 20:04:46,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 82 transitions, 326 flow [2023-08-26 20:04:46,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 82 transitions, 326 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:04:46,086 INFO L231 Difference]: Finished difference. Result has 93 places, 82 transitions, 180 flow [2023-08-26 20:04:46,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=93, PETRI_TRANSITIONS=82} [2023-08-26 20:04:46,087 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -15 predicate places. [2023-08-26 20:04:46,087 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 82 transitions, 180 flow [2023-08-26 20:04:46,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:04:46,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:04:46,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:04:46,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 20:04:46,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:04:46,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:04:46,088 INFO L85 PathProgramCache]: Analyzing trace with hash 932199, now seen corresponding path program 1 times [2023-08-26 20:04:46,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:04:46,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884145810] [2023-08-26 20:04:46,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:04:46,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:04:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:04:46,250 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 20:04:46,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:04:46,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884145810] [2023-08-26 20:04:46,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884145810] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:04:46,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:04:46,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:04:46,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091526570] [2023-08-26 20:04:46,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:04:46,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:04:46,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:04:46,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:04:46,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:04:46,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 429 [2023-08-26 20:04:46,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 82 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:04:46,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:04:46,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 429 [2023-08-26 20:04:46,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:12,765 INFO L124 PetriNetUnfolderBase]: 476499/600662 cut-off events. [2023-08-26 20:05:12,766 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-26 20:05:14,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183646 conditions, 600662 events. 476499/600662 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19754. Compared 3926885 event pairs, 476499 based on Foata normal form. 0/548985 useless extension candidates. Maximal degree in co-relation 1183642. Up to 577518 conditions per place. [2023-08-26 20:05:16,367 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 71 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-08-26 20:05:16,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 80 transitions, 320 flow [2023-08-26 20:05:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:05:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:05:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2023-08-26 20:05:16,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4234654234654235 [2023-08-26 20:05:16,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2023-08-26 20:05:16,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2023-08-26 20:05:16,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:16,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2023-08-26 20:05:16,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:16,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:16,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:16,390 INFO L175 Difference]: Start difference. First operand has 93 places, 82 transitions, 180 flow. Second operand 3 states and 545 transitions. [2023-08-26 20:05:16,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 80 transitions, 320 flow [2023-08-26 20:05:16,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 80 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:05:16,407 INFO L231 Difference]: Finished difference. Result has 92 places, 80 transitions, 177 flow [2023-08-26 20:05:16,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=92, PETRI_TRANSITIONS=80} [2023-08-26 20:05:16,408 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -16 predicate places. [2023-08-26 20:05:16,408 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 80 transitions, 177 flow [2023-08-26 20:05:16,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:16,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:16,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:05:16,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 20:05:16,412 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:05:16,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:16,412 INFO L85 PathProgramCache]: Analyzing trace with hash 895868090, now seen corresponding path program 1 times [2023-08-26 20:05:16,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:16,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104620982] [2023-08-26 20:05:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:16,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:16,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:16,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104620982] [2023-08-26 20:05:16,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104620982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:16,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:16,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:05:16,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977698936] [2023-08-26 20:05:16,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:16,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:05:16,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:05:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:05:16,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 429 [2023-08-26 20:05:16,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 80 transitions, 177 flow. Second operand has 3 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 20:05:16,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:16,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 429 [2023-08-26 20:05:16,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:45,020 INFO L124 PetriNetUnfolderBase]: 472635/595754 cut-off events. [2023-08-26 20:05:45,020 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-26 20:05:46,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173835 conditions, 595754 events. 472635/595754 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19754. Compared 3894914 event pairs, 472635 based on Foata normal form. 0/545118 useless extension candidates. Maximal degree in co-relation 1173831. Up to 572614 conditions per place. [2023-08-26 20:05:48,703 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 69 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-08-26 20:05:48,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 78 transitions, 313 flow [2023-08-26 20:05:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:05:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:05:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-08-26 20:05:48,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219114219114219 [2023-08-26 20:05:48,705 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-08-26 20:05:48,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-08-26 20:05:48,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:48,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-08-26 20:05:48,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:48,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:48,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:48,724 INFO L175 Difference]: Start difference. First operand has 92 places, 80 transitions, 177 flow. Second operand 3 states and 543 transitions. [2023-08-26 20:05:48,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 78 transitions, 313 flow [2023-08-26 20:05:48,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 78 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:05:48,739 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 174 flow [2023-08-26 20:05:48,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2023-08-26 20:05:48,741 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -17 predicate places. [2023-08-26 20:05:48,741 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 174 flow [2023-08-26 20:05:48,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 20:05:48,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:48,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:05:48,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 20:05:48,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:05:48,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:48,742 INFO L85 PathProgramCache]: Analyzing trace with hash 895868088, now seen corresponding path program 1 times [2023-08-26 20:05:48,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:48,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724058766] [2023-08-26 20:05:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:48,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:49,344 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 20:05:49,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:49,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724058766] [2023-08-26 20:05:49,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724058766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:49,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:49,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:05:49,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238952045] [2023-08-26 20:05:49,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:49,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:05:49,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:49,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:05:49,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:05:49,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 429 [2023-08-26 20:05:49,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:49,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:49,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 429 [2023-08-26 20:05:49,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:16,763 INFO L124 PetriNetUnfolderBase]: 468771/590846 cut-off events. [2023-08-26 20:06:16,763 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-26 20:06:18,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1164024 conditions, 590846 events. 468771/590846 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19754. Compared 3863723 event pairs, 468771 based on Foata normal form. 0/541251 useless extension candidates. Maximal degree in co-relation 1164020. Up to 567710 conditions per place. [2023-08-26 20:06:20,497 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 67 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-26 20:06:20,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 76 transitions, 306 flow [2023-08-26 20:06:20,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:06:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:06:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2023-08-26 20:06:20,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42735042735042733 [2023-08-26 20:06:20,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2023-08-26 20:06:20,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2023-08-26 20:06:20,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:20,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2023-08-26 20:06:20,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:20,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:20,519 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:20,519 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 174 flow. Second operand 3 states and 550 transitions. [2023-08-26 20:06:20,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 76 transitions, 306 flow [2023-08-26 20:06:20,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 76 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:06:20,522 INFO L231 Difference]: Finished difference. Result has 90 places, 76 transitions, 171 flow [2023-08-26 20:06:20,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=90, PETRI_TRANSITIONS=76} [2023-08-26 20:06:20,523 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -18 predicate places. [2023-08-26 20:06:20,523 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 76 transitions, 171 flow [2023-08-26 20:06:20,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:20,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:20,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:20,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 20:06:20,524 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:06:20,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:20,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1935797498, now seen corresponding path program 1 times [2023-08-26 20:06:20,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:20,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701392671] [2023-08-26 20:06:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:20,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:20,678 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 20:06:20,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:20,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701392671] [2023-08-26 20:06:20,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701392671] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:06:20,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:06:20,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:06:20,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964326228] [2023-08-26 20:06:20,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:06:20,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:06:20,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:20,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:06:20,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:06:20,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 429 [2023-08-26 20:06:20,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 76 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:20,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:20,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 429 [2023-08-26 20:06:20,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:48,510 INFO L124 PetriNetUnfolderBase]: 467859/589598 cut-off events. [2023-08-26 20:06:48,510 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-26 20:06:50,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161545 conditions, 589598 events. 467859/589598 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19754. Compared 3854687 event pairs, 467859 based on Foata normal form. 0/540327 useless extension candidates. Maximal degree in co-relation 1161541. Up to 566478 conditions per place. [2023-08-26 20:06:52,228 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 65 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-26 20:06:52,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 299 flow [2023-08-26 20:06:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:06:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:06:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-08-26 20:06:52,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2023-08-26 20:06:52,230 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-08-26 20:06:52,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-08-26 20:06:52,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:52,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-08-26 20:06:52,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:52,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:52,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:52,233 INFO L175 Difference]: Start difference. First operand has 90 places, 76 transitions, 171 flow. Second operand 3 states and 539 transitions. [2023-08-26 20:06:52,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 299 flow [2023-08-26 20:06:52,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 74 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:06:52,237 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 168 flow [2023-08-26 20:06:52,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2023-08-26 20:06:52,237 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -19 predicate places. [2023-08-26 20:06:52,237 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 168 flow [2023-08-26 20:06:52,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:52,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:52,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:52,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 20:06:52,238 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:06:52,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:52,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1935797497, now seen corresponding path program 1 times [2023-08-26 20:06:52,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:52,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024796915] [2023-08-26 20:06:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:52,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:52,389 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 20:06:52,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:52,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024796915] [2023-08-26 20:06:52,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024796915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:06:52,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:06:52,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:06:52,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714488212] [2023-08-26 20:06:52,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:06:52,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:06:52,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:52,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:06:52,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:06:52,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 429 [2023-08-26 20:06:52,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:52,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:52,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 429 [2023-08-26 20:06:52,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:07:20,788 INFO L124 PetriNetUnfolderBase]: 466947/588094 cut-off events. [2023-08-26 20:07:20,788 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-26 20:07:22,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1158810 conditions, 588094 events. 466947/588094 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19743. Compared 3840389 event pairs, 466947 based on Foata normal form. 0/539915 useless extension candidates. Maximal degree in co-relation 1158806. Up to 565246 conditions per place. [2023-08-26 20:07:25,053 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 63 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2023-08-26 20:07:25,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 72 transitions, 292 flow [2023-08-26 20:07:25,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:07:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:07:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 558 transitions. [2023-08-26 20:07:25,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43356643356643354 [2023-08-26 20:07:25,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 558 transitions. [2023-08-26 20:07:25,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 558 transitions. [2023-08-26 20:07:25,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:07:25,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 558 transitions. [2023-08-26 20:07:25,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:25,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:25,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:25,080 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 168 flow. Second operand 3 states and 558 transitions. [2023-08-26 20:07:25,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 72 transitions, 292 flow [2023-08-26 20:07:25,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 72 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:07:25,082 INFO L231 Difference]: Finished difference. Result has 88 places, 72 transitions, 165 flow [2023-08-26 20:07:25,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=88, PETRI_TRANSITIONS=72} [2023-08-26 20:07:25,082 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -20 predicate places. [2023-08-26 20:07:25,082 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 72 transitions, 165 flow [2023-08-26 20:07:25,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:25,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:07:25,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:07:25,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 20:07:25,083 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:07:25,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:07:25,083 INFO L85 PathProgramCache]: Analyzing trace with hash 580577464, now seen corresponding path program 1 times [2023-08-26 20:07:25,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:07:25,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144100139] [2023-08-26 20:07:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:07:25,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:07:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:07:25,366 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 20:07:25,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:07:25,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144100139] [2023-08-26 20:07:25,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144100139] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:07:25,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:07:25,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:07:25,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115055943] [2023-08-26 20:07:25,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:07:25,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:07:25,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:07:25,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:07:25,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:07:25,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 429 [2023-08-26 20:07:25,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 72 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:25,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:07:25,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 429 [2023-08-26 20:07:25,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:07:54,348 INFO L124 PetriNetUnfolderBase]: 466035/586798 cut-off events. [2023-08-26 20:07:54,348 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-26 20:07:56,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1156283 conditions, 586798 events. 466035/586798 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19743. Compared 3830904 event pairs, 466035 based on Foata normal form. 0/538955 useless extension candidates. Maximal degree in co-relation 1156279. Up to 564014 conditions per place. [2023-08-26 20:07:58,293 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 61 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-08-26 20:07:58,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 70 transitions, 285 flow [2023-08-26 20:07:58,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:07:58,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:07:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-26 20:07:58,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4156954156954157 [2023-08-26 20:07:58,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-26 20:07:58,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-26 20:07:58,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:07:58,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-26 20:07:58,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:58,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:58,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:58,317 INFO L175 Difference]: Start difference. First operand has 88 places, 72 transitions, 165 flow. Second operand 3 states and 535 transitions. [2023-08-26 20:07:58,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 70 transitions, 285 flow [2023-08-26 20:07:58,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 70 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:07:58,323 INFO L231 Difference]: Finished difference. Result has 87 places, 70 transitions, 162 flow [2023-08-26 20:07:58,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=87, PETRI_TRANSITIONS=70} [2023-08-26 20:07:58,325 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -21 predicate places. [2023-08-26 20:07:58,325 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 70 transitions, 162 flow [2023-08-26 20:07:58,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:58,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:07:58,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:07:58,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 20:07:58,326 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:07:58,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:07:58,326 INFO L85 PathProgramCache]: Analyzing trace with hash 580577463, now seen corresponding path program 1 times [2023-08-26 20:07:58,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:07:58,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401111844] [2023-08-26 20:07:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:07:58,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:07:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:07:58,433 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 20:07:58,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:07:58,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401111844] [2023-08-26 20:07:58,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401111844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:07:58,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:07:58,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:07:58,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869302686] [2023-08-26 20:07:58,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:07:58,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:07:58,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:07:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:07:58,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:07:58,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 429 [2023-08-26 20:07:58,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 70 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 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 20:07:58,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:07:58,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 429 [2023-08-26 20:07:58,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:08:27,215 INFO L124 PetriNetUnfolderBase]: 465123/585502 cut-off events. [2023-08-26 20:08:27,215 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-26 20:08:29,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153756 conditions, 585502 events. 465123/585502 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19743. Compared 3821146 event pairs, 465123 based on Foata normal form. 0/537995 useless extension candidates. Maximal degree in co-relation 1153752. Up to 562782 conditions per place. [2023-08-26 20:08:31,406 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 59 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-08-26 20:08:31,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 68 transitions, 278 flow [2023-08-26 20:08:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:08:31,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:08:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2023-08-26 20:08:31,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43045843045843046 [2023-08-26 20:08:31,408 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2023-08-26 20:08:31,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2023-08-26 20:08:31,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:08:31,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2023-08-26 20:08:31,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:31,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:31,411 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:31,411 INFO L175 Difference]: Start difference. First operand has 87 places, 70 transitions, 162 flow. Second operand 3 states and 554 transitions. [2023-08-26 20:08:31,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 68 transitions, 278 flow [2023-08-26 20:08:31,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 68 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:08:31,412 INFO L231 Difference]: Finished difference. Result has 86 places, 68 transitions, 159 flow [2023-08-26 20:08:31,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=86, PETRI_TRANSITIONS=68} [2023-08-26 20:08:31,413 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -22 predicate places. [2023-08-26 20:08:31,413 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 68 transitions, 159 flow [2023-08-26 20:08:31,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 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 20:08:31,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:31,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:31,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 20:08:31,413 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:08:31,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:31,413 INFO L85 PathProgramCache]: Analyzing trace with hash -410784264, now seen corresponding path program 1 times [2023-08-26 20:08:31,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:31,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780149530] [2023-08-26 20:08:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:31,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:31,471 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 20:08:31,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:31,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780149530] [2023-08-26 20:08:31,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780149530] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:08:31,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:08:31,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:08:31,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587987941] [2023-08-26 20:08:31,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:08:31,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:08:31,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:31,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:08:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:08:31,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 429 [2023-08-26 20:08:31,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 68 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:31,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:31,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 429 [2023-08-26 20:08:31,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:09:00,126 INFO L124 PetriNetUnfolderBase]: 461259/580342 cut-off events. [2023-08-26 20:09:00,126 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-26 20:09:02,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1143693 conditions, 580342 events. 461259/580342 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19703. Compared 3782319 event pairs, 461259 based on Foata normal form. 0/533875 useless extension candidates. Maximal degree in co-relation 1143689. Up to 557878 conditions per place. [2023-08-26 20:09:04,294 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 57 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-08-26 20:09:04,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 66 transitions, 271 flow [2023-08-26 20:09:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:09:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:09:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-08-26 20:09:04,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289044289044289 [2023-08-26 20:09:04,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-08-26 20:09:04,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-08-26 20:09:04,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:09:04,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-08-26 20:09:04,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:04,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:04,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:04,308 INFO L175 Difference]: Start difference. First operand has 86 places, 68 transitions, 159 flow. Second operand 3 states and 552 transitions. [2023-08-26 20:09:04,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 66 transitions, 271 flow [2023-08-26 20:09:04,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 66 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:09:04,310 INFO L231 Difference]: Finished difference. Result has 85 places, 66 transitions, 156 flow [2023-08-26 20:09:04,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=85, PETRI_TRANSITIONS=66} [2023-08-26 20:09:04,312 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -23 predicate places. [2023-08-26 20:09:04,312 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 66 transitions, 156 flow [2023-08-26 20:09:04,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:04,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:09:04,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:09:04,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 20:09:04,315 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:09:04,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:09:04,315 INFO L85 PathProgramCache]: Analyzing trace with hash -410784263, now seen corresponding path program 1 times [2023-08-26 20:09:04,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:09:04,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791294144] [2023-08-26 20:09:04,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:09:04,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:09:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:09:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:09:04,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:09:04,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791294144] [2023-08-26 20:09:04,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791294144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:09:04,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:09:04,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:09:04,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869184282] [2023-08-26 20:09:04,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:09:04,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:09:04,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:09:04,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:09:04,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:09:04,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 429 [2023-08-26 20:09:04,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 66 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:04,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:09:04,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 429 [2023-08-26 20:09:04,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:09:34,166 INFO L124 PetriNetUnfolderBase]: 457395/575182 cut-off events. [2023-08-26 20:09:34,166 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-26 20:09:36,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133630 conditions, 575182 events. 457395/575182 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19663. Compared 3742045 event pairs, 457395 based on Foata normal form. 0/529755 useless extension candidates. Maximal degree in co-relation 1133626. Up to 552974 conditions per place. [2023-08-26 20:09:38,203 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 55 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-08-26 20:09:38,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 64 transitions, 264 flow [2023-08-26 20:09:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:09:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:09:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2023-08-26 20:09:38,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411033411033411 [2023-08-26 20:09:38,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2023-08-26 20:09:38,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2023-08-26 20:09:38,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:09:38,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2023-08-26 20:09:38,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:38,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:38,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:38,208 INFO L175 Difference]: Start difference. First operand has 85 places, 66 transitions, 156 flow. Second operand 3 states and 529 transitions. [2023-08-26 20:09:38,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 64 transitions, 264 flow [2023-08-26 20:09:38,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 64 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:09:38,211 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 153 flow [2023-08-26 20:09:38,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2023-08-26 20:09:38,211 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -24 predicate places. [2023-08-26 20:09:38,211 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 153 flow [2023-08-26 20:09:38,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:38,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:09:38,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:09:38,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 20:09:38,212 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:09:38,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:09:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash 373335623, now seen corresponding path program 1 times [2023-08-26 20:09:38,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:09:38,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63747323] [2023-08-26 20:09:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:09:38,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:09:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:09:38,251 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 20:09:38,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:09:38,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63747323] [2023-08-26 20:09:38,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63747323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:09:38,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:09:38,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:09:38,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866212217] [2023-08-26 20:09:38,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:09:38,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:09:38,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:09:38,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:09:38,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:09:38,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 429 [2023-08-26 20:09:38,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:09:38,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:09:38,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 429 [2023-08-26 20:09:38,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:10:06,445 INFO L124 PetriNetUnfolderBase]: 438960/551623 cut-off events. [2023-08-26 20:10:06,445 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-26 20:10:08,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1087537 conditions, 551623 events. 438960/551623 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 18919. Compared 3566657 event pairs, 438960 based on Foata normal form. 0/510296 useless extension candidates. Maximal degree in co-relation 1087533. Up to 530439 conditions per place. [2023-08-26 20:10:10,611 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 53 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-08-26 20:10:10,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 62 transitions, 257 flow [2023-08-26 20:10:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:10:10,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:10:10,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-08-26 20:10:10,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4094794094794095 [2023-08-26 20:10:10,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-08-26 20:10:10,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-08-26 20:10:10,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:10:10,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-08-26 20:10:10,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:10,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:10,615 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:10,615 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 153 flow. Second operand 3 states and 527 transitions. [2023-08-26 20:10:10,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 62 transitions, 257 flow [2023-08-26 20:10:10,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 62 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:10:10,619 INFO L231 Difference]: Finished difference. Result has 83 places, 62 transitions, 150 flow [2023-08-26 20:10:10,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=83, PETRI_TRANSITIONS=62} [2023-08-26 20:10:10,620 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -25 predicate places. [2023-08-26 20:10:10,620 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 62 transitions, 150 flow [2023-08-26 20:10:10,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:10,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:10:10,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:10:10,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 20:10:10,621 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:10:10,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:10:10,621 INFO L85 PathProgramCache]: Analyzing trace with hash 373335621, now seen corresponding path program 1 times [2023-08-26 20:10:10,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:10:10,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269799063] [2023-08-26 20:10:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:10:10,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:10:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:10:10,825 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 20:10:10,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:10:10,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269799063] [2023-08-26 20:10:10,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269799063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:10:10,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:10:10,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:10:10,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283501746] [2023-08-26 20:10:10,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:10:10,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:10:10,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:10:10,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:10:10,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:10:10,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 429 [2023-08-26 20:10:10,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 62 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:10,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:10:10,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 429 [2023-08-26 20:10:10,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:10:37,866 INFO L124 PetriNetUnfolderBase]: 420525/528064 cut-off events. [2023-08-26 20:10:37,866 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-26 20:10:40,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041444 conditions, 528064 events. 420525/528064 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 18175. Compared 3391680 event pairs, 420525 based on Foata normal form. 0/490837 useless extension candidates. Maximal degree in co-relation 1041440. Up to 507904 conditions per place. [2023-08-26 20:10:42,125 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 51 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-08-26 20:10:42,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 60 transitions, 250 flow [2023-08-26 20:10:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:10:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:10:42,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2023-08-26 20:10:42,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2023-08-26 20:10:42,130 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2023-08-26 20:10:42,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2023-08-26 20:10:42,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:10:42,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2023-08-26 20:10:42,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:42,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:42,132 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:42,132 INFO L175 Difference]: Start difference. First operand has 83 places, 62 transitions, 150 flow. Second operand 3 states and 546 transitions. [2023-08-26 20:10:42,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 60 transitions, 250 flow [2023-08-26 20:10:42,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 60 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:10:42,134 INFO L231 Difference]: Finished difference. Result has 82 places, 60 transitions, 147 flow [2023-08-26 20:10:42,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=82, PETRI_TRANSITIONS=60} [2023-08-26 20:10:42,134 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -26 predicate places. [2023-08-26 20:10:42,135 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 60 transitions, 147 flow [2023-08-26 20:10:42,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:42,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:10:42,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:10:42,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 20:10:42,135 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:10:42,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:10:42,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2001696850, now seen corresponding path program 1 times [2023-08-26 20:10:42,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:10:42,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923135108] [2023-08-26 20:10:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:10:42,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:10:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:10:42,858 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 20:10:42,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:10:42,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923135108] [2023-08-26 20:10:42,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923135108] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:10:42,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:10:42,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:10:42,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904163328] [2023-08-26 20:10:42,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:10:42,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 20:10:42,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:10:42,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 20:10:42,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:10:42,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 429 [2023-08-26 20:10:42,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 60 transitions, 147 flow. Second operand has 7 states, 7 states have (on average 142.14285714285714) internal successors, (995), 7 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:10:42,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:10:42,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 429 [2023-08-26 20:10:42,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:11:03,165 INFO L124 PetriNetUnfolderBase]: 334509/421568 cut-off events. [2023-08-26 20:11:03,165 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-26 20:11:04,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832549 conditions, 421568 events. 334509/421568 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 14173. Compared 2679053 event pairs, 334509 based on Foata normal form. 0/401749 useless extension candidates. Maximal degree in co-relation 832545. Up to 405504 conditions per place. [2023-08-26 20:11:06,486 INFO L140 encePairwiseOnDemand]: 427/429 looper letters, 50 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-26 20:11:06,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 59 transitions, 247 flow [2023-08-26 20:11:06,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:11:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:11:06,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-08-26 20:11:06,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667443667443667 [2023-08-26 20:11:06,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-08-26 20:11:06,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-08-26 20:11:06,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:11:06,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-08-26 20:11:06,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:06,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:06,491 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:06,491 INFO L175 Difference]: Start difference. First operand has 82 places, 60 transitions, 147 flow. Second operand 3 states and 472 transitions. [2023-08-26 20:11:06,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 59 transitions, 247 flow [2023-08-26 20:11:06,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 59 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:11:06,493 INFO L231 Difference]: Finished difference. Result has 82 places, 59 transitions, 146 flow [2023-08-26 20:11:06,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=82, PETRI_TRANSITIONS=59} [2023-08-26 20:11:06,494 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -26 predicate places. [2023-08-26 20:11:06,494 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 59 transitions, 146 flow [2023-08-26 20:11:06,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 142.14285714285714) internal successors, (995), 7 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:06,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:11:06,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:11:06,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 20:11:06,494 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:11:06,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:11:06,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2001696851, now seen corresponding path program 1 times [2023-08-26 20:11:06,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:11:06,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770642112] [2023-08-26 20:11:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:11:06,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:11:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:11:06,818 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 20:11:06,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:11:06,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770642112] [2023-08-26 20:11:06,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770642112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:11:06,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:11:06,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 20:11:06,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424994686] [2023-08-26 20:11:06,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:11:06,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 20:11:06,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:11:06,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 20:11:06,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-26 20:11:06,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 429 [2023-08-26 20:11:06,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 59 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:06,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:11:06,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 429 [2023-08-26 20:11:06,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:11:24,206 INFO L124 PetriNetUnfolderBase]: 248493/315072 cut-off events. [2023-08-26 20:11:24,206 INFO L125 PetriNetUnfolderBase]: For 2048/2048 co-relation queries the response was YES. [2023-08-26 20:11:25,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623654 conditions, 315072 events. 248493/315072 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 10171. Compared 1975901 event pairs, 248493 based on Foata normal form. 0/312661 useless extension candidates. Maximal degree in co-relation 623650. Up to 303104 conditions per place. [2023-08-26 20:11:26,370 INFO L140 encePairwiseOnDemand]: 427/429 looper letters, 49 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-26 20:11:26,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 58 transitions, 244 flow [2023-08-26 20:11:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:11:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:11:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-26 20:11:26,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2023-08-26 20:11:26,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-26 20:11:26,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-26 20:11:26,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:11:26,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-26 20:11:26,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:26,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:26,374 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:26,374 INFO L175 Difference]: Start difference. First operand has 82 places, 59 transitions, 146 flow. Second operand 3 states and 468 transitions. [2023-08-26 20:11:26,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 58 transitions, 244 flow [2023-08-26 20:11:26,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 58 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:11:26,376 INFO L231 Difference]: Finished difference. Result has 82 places, 58 transitions, 145 flow [2023-08-26 20:11:26,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=82, PETRI_TRANSITIONS=58} [2023-08-26 20:11:26,376 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -26 predicate places. [2023-08-26 20:11:26,376 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 58 transitions, 145 flow [2023-08-26 20:11:26,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:26,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:11:26,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:26,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 20:11:26,377 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2023-08-26 20:11:26,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:11:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1925423541, now seen corresponding path program 1 times [2023-08-26 20:11:26,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:11:26,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521837236] [2023-08-26 20:11:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:11:26,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:11:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:11:27,531 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 20:11:27,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:11:27,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521837236] [2023-08-26 20:11:27,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521837236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:11:27,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:11:27,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:11:27,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836864179] [2023-08-26 20:11:27,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:11:27,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 20:11:27,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:11:27,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 20:11:27,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-26 20:11:27,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 429 [2023-08-26 20:11:27,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 58 transitions, 145 flow. Second operand has 6 states, 6 states have (on average 201.66666666666666) internal successors, (1210), 6 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:11:27,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:11:27,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 429 [2023-08-26 20:11:27,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-26 20:12:55,394 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 20:12:56,424 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 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown