/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:55:20,404 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:55:20,482 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 11:55:20,486 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:55:20,486 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:55:20,514 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:55:20,515 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:55:20,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:55:20,517 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:55:20,520 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:55:20,520 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:55:20,521 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:55:20,521 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:55:20,522 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:55:20,522 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:55:20,522 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:55:20,523 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:55:20,523 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:55:20,523 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:55:20,523 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:55:20,524 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:55:20,524 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:55:20,525 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:55:20,525 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:55:20,525 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:55:20,526 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:55:20,526 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:55:20,526 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:55:20,526 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:55:20,527 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:55:20,528 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:55:20,528 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:55:20,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:55:20,528 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:55:20,528 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:55:20,529 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:55:20,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:55:20,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:55:20,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:55:20,895 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:55:20,897 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:55:20,899 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-08-26 11:55:22,061 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:55:22,335 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:55:22,336 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-08-26 11:55:22,357 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/274484e1b/3acabfccb3714952ae2195129038639b/FLAGdd904634d [2023-08-26 11:55:22,377 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/274484e1b/3acabfccb3714952ae2195129038639b [2023-08-26 11:55:22,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:55:22,382 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:55:22,385 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:55:22,385 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:55:22,388 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:55:22,388 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:55:22" (1/1) ... [2023-08-26 11:55:22,389 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@326bec4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:55:22, skipping insertion in model container [2023-08-26 11:55:22,389 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:55:22" (1/1) ... [2023-08-26 11:55:22,438 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:55:22,612 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 11:55:22,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:55:22,762 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:55:22,787 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 11:55:22,793 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [270] [2023-08-26 11:55:22,795 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [270] [2023-08-26 11:55:22,816 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [705] [2023-08-26 11:55:22,817 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [706] [2023-08-26 11:55:22,817 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned [707] [2023-08-26 11:55:22,818 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned [713] [2023-08-26 11:55:22,818 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned [716] [2023-08-26 11:55:22,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:55:22,855 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:55:22,855 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:55:22,855 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:55:22,861 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:55:22,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:55:22 WrapperNode [2023-08-26 11:55:22,862 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:55:22,863 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:55:22,863 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:55:22,863 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:55:22,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:55:22" (1/1) ... [2023-08-26 11:55:22,896 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:55:22" (1/1) ... [2023-08-26 11:55:22,922 INFO L138 Inliner]: procedures = 173, calls = 25, calls flagged for inlining = 6, calls inlined = 9, statements flattened = 115 [2023-08-26 11:55:22,923 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:55:22,924 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:55:22,924 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:55:22,924 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:55:22,931 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:55:22" (1/1) ... [2023-08-26 11:55:22,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:55:22" (1/1) ... [2023-08-26 11:55:22,942 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:55:22" (1/1) ... [2023-08-26 11:55:22,942 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:55:22" (1/1) ... [2023-08-26 11:55:22,950 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:55:22" (1/1) ... [2023-08-26 11:55:22,952 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:55:22" (1/1) ... [2023-08-26 11:55:22,954 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:55:22" (1/1) ... [2023-08-26 11:55:22,955 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:55:22" (1/1) ... [2023-08-26 11:55:22,967 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:55:22,968 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:55:22,968 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:55:22,968 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:55:22,969 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:55:22" (1/1) ... [2023-08-26 11:55:22,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:55:22,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:55:23,000 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 11:55:23,016 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 11:55:23,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 11:55:23,033 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 11:55:23,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 11:55:23,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:55:23,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 11:55:23,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:55:23,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:55:23,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:55:23,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:55:23,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 11:55:23,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:55:23,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:55:23,037 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 11:55:23,182 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:55:23,184 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:55:23,454 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:55:23,577 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:55:23,577 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 11:55:23,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:55:23 BoogieIcfgContainer [2023-08-26 11:55:23,580 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:55:23,582 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:55:23,582 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:55:23,585 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:55:23,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:55:22" (1/3) ... [2023-08-26 11:55:23,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee6f1d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:55:23, skipping insertion in model container [2023-08-26 11:55:23,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:55:22" (2/3) ... [2023-08-26 11:55:23,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee6f1d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:55:23, skipping insertion in model container [2023-08-26 11:55:23,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:55:23" (3/3) ... [2023-08-26 11:55:23,589 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2023-08-26 11:55:23,604 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:55:23,604 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-08-26 11:55:23,604 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:55:23,658 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:55:23,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 88 transitions, 181 flow [2023-08-26 11:55:23,760 INFO L124 PetriNetUnfolderBase]: 11/134 cut-off events. [2023-08-26 11:55:23,760 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:55:23,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 134 events. 11/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 360 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-26 11:55:23,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 88 transitions, 181 flow [2023-08-26 11:55:23,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 88 transitions, 181 flow [2023-08-26 11:55:23,773 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:55:23,784 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 88 transitions, 181 flow [2023-08-26 11:55:23,787 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 88 transitions, 181 flow [2023-08-26 11:55:23,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 88 transitions, 181 flow [2023-08-26 11:55:23,813 INFO L124 PetriNetUnfolderBase]: 11/134 cut-off events. [2023-08-26 11:55:23,813 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:55:23,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 134 events. 11/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 360 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-26 11:55:23,816 INFO L119 LiptonReduction]: Number of co-enabled transitions 2450 [2023-08-26 11:55:25,300 INFO L134 LiptonReduction]: Checked pairs total: 7035 [2023-08-26 11:55:25,301 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-26 11:55:25,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:55:25,323 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;@54afbafe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:55:25,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-08-26 11:55:25,325 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:55:25,325 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:55:25,325 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:55:25,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:25,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:55:25,326 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-26 11:55:25,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:25,331 INFO L85 PathProgramCache]: Analyzing trace with hash 13820, now seen corresponding path program 1 times [2023-08-26 11:55:25,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:25,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550377272] [2023-08-26 11:55:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:25,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:25,535 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 11:55:25,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:25,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550377272] [2023-08-26 11:55:25,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550377272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:25,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:25,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:55:25,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054379472] [2023-08-26 11:55:25,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:25,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:25,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:25,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 154 [2023-08-26 11:55:25,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:25,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:25,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 154 [2023-08-26 11:55:25,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:25,715 INFO L124 PetriNetUnfolderBase]: 141/359 cut-off events. [2023-08-26 11:55:25,716 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:55:25,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 663 conditions, 359 events. 141/359 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1765 event pairs, 89 based on Foata normal form. 25/252 useless extension candidates. Maximal degree in co-relation 618. Up to 230 conditions per place. [2023-08-26 11:55:25,719 INFO L140 encePairwiseOnDemand]: 147/154 looper letters, 42 selfloop transitions, 4 changer transitions 4/59 dead transitions. [2023-08-26 11:55:25,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 59 transitions, 223 flow [2023-08-26 11:55:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 211 transitions. [2023-08-26 11:55:25,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45670995670995673 [2023-08-26 11:55:25,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 211 transitions. [2023-08-26 11:55:25,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 211 transitions. [2023-08-26 11:55:25,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:25,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 211 transitions. [2023-08-26 11:55:25,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:25,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:25,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:25,741 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 85 flow. Second operand 3 states and 211 transitions. [2023-08-26 11:55:25,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 59 transitions, 223 flow [2023-08-26 11:55:25,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 59 transitions, 223 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:55:25,745 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 99 flow [2023-08-26 11:55:25,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-26 11:55:25,749 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-26 11:55:25,749 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 99 flow [2023-08-26 11:55:25,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:25,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:25,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:55:25,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:55:25,750 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-26 11:55:25,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:25,750 INFO L85 PathProgramCache]: Analyzing trace with hash 13821, now seen corresponding path program 1 times [2023-08-26 11:55:25,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:25,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914900504] [2023-08-26 11:55:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:25,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:25,820 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 11:55:25,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:25,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914900504] [2023-08-26 11:55:25,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914900504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:25,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:25,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:55:25,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655965724] [2023-08-26 11:55:25,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:25,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:25,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:25,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:25,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:25,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 154 [2023-08-26 11:55:25,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:25,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:25,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 154 [2023-08-26 11:55:25,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:25,897 INFO L124 PetriNetUnfolderBase]: 129/330 cut-off events. [2023-08-26 11:55:25,897 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-26 11:55:25,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 330 events. 129/330 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1622 event pairs, 97 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 618. Up to 252 conditions per place. [2023-08-26 11:55:25,900 INFO L140 encePairwiseOnDemand]: 151/154 looper letters, 33 selfloop transitions, 2 changer transitions 1/45 dead transitions. [2023-08-26 11:55:25,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 45 transitions, 187 flow [2023-08-26 11:55:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:25,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:25,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-08-26 11:55:25,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2023-08-26 11:55:25,902 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-08-26 11:55:25,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-08-26 11:55:25,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:25,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-08-26 11:55:25,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:25,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:25,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:25,906 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 99 flow. Second operand 3 states and 201 transitions. [2023-08-26 11:55:25,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 45 transitions, 187 flow [2023-08-26 11:55:25,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 179 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:25,909 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 93 flow [2023-08-26 11:55:25,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-08-26 11:55:25,910 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-08-26 11:55:25,910 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 93 flow [2023-08-26 11:55:25,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:25,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:25,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:55:25,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:55:25,911 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-26 11:55:25,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:25,911 INFO L85 PathProgramCache]: Analyzing trace with hash 428799, now seen corresponding path program 1 times [2023-08-26 11:55:25,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:25,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070825912] [2023-08-26 11:55:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:25,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:55:25,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:25,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070825912] [2023-08-26 11:55:25,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070825912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:25,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:25,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:25,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946472160] [2023-08-26 11:55:25,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:25,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:25,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:25,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:25,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 154 [2023-08-26 11:55:25,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:25,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:25,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 154 [2023-08-26 11:55:25,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:26,054 INFO L124 PetriNetUnfolderBase]: 119/311 cut-off events. [2023-08-26 11:55:26,054 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-08-26 11:55:26,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 311 events. 119/311 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1532 event pairs, 33 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 577. Up to 154 conditions per place. [2023-08-26 11:55:26,058 INFO L140 encePairwiseOnDemand]: 146/154 looper letters, 38 selfloop transitions, 6 changer transitions 1/53 dead transitions. [2023-08-26 11:55:26,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 219 flow [2023-08-26 11:55:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:26,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-08-26 11:55:26,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43722943722943725 [2023-08-26 11:55:26,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-08-26 11:55:26,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-08-26 11:55:26,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:26,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-08-26 11:55:26,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,065 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,065 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 93 flow. Second operand 3 states and 202 transitions. [2023-08-26 11:55:26,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 219 flow [2023-08-26 11:55:26,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 215 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:26,068 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 135 flow [2023-08-26 11:55:26,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2023-08-26 11:55:26,069 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-26 11:55:26,069 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 135 flow [2023-08-26 11:55:26,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:26,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:55:26,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:55:26,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-26 11:55:26,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:26,070 INFO L85 PathProgramCache]: Analyzing trace with hash 428800, now seen corresponding path program 1 times [2023-08-26 11:55:26,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:26,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853522813] [2023-08-26 11:55:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:26,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:26,135 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 11:55:26,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:26,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853522813] [2023-08-26 11:55:26,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853522813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:26,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:26,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:26,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724224751] [2023-08-26 11:55:26,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:26,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:26,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:26,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:26,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:26,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 154 [2023-08-26 11:55:26,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:26,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 154 [2023-08-26 11:55:26,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:26,202 INFO L124 PetriNetUnfolderBase]: 99/267 cut-off events. [2023-08-26 11:55:26,202 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-08-26 11:55:26,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 267 events. 99/267 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1238 event pairs, 35 based on Foata normal form. 24/234 useless extension candidates. Maximal degree in co-relation 571. Up to 123 conditions per place. [2023-08-26 11:55:26,204 INFO L140 encePairwiseOnDemand]: 150/154 looper letters, 37 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-26 11:55:26,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 227 flow [2023-08-26 11:55:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:26,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:26,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-08-26 11:55:26,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43722943722943725 [2023-08-26 11:55:26,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-08-26 11:55:26,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-08-26 11:55:26,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:26,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-08-26 11:55:26,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,208 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 135 flow. Second operand 3 states and 202 transitions. [2023-08-26 11:55:26,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 227 flow [2023-08-26 11:55:26,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 47 transitions, 215 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:26,210 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 123 flow [2023-08-26 11:55:26,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2023-08-26 11:55:26,211 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-08-26 11:55:26,211 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 123 flow [2023-08-26 11:55:26,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:26,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:55:26,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:55:26,212 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-26 11:55:26,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:26,212 INFO L85 PathProgramCache]: Analyzing trace with hash 412015733, now seen corresponding path program 1 times [2023-08-26 11:55:26,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:26,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066586775] [2023-08-26 11:55:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:26,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:26,289 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 11:55:26,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:26,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066586775] [2023-08-26 11:55:26,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066586775] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:26,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:26,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:26,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855646085] [2023-08-26 11:55:26,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:26,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:26,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:26,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:26,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:26,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 154 [2023-08-26 11:55:26,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:26,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 154 [2023-08-26 11:55:26,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:26,372 INFO L124 PetriNetUnfolderBase]: 89/236 cut-off events. [2023-08-26 11:55:26,372 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-08-26 11:55:26,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 236 events. 89/236 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1030 event pairs, 3 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 503. Up to 150 conditions per place. [2023-08-26 11:55:26,374 INFO L140 encePairwiseOnDemand]: 150/154 looper letters, 35 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-08-26 11:55:26,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 233 flow [2023-08-26 11:55:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2023-08-26 11:55:26,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2023-08-26 11:55:26,375 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 203 transitions. [2023-08-26 11:55:26,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 203 transitions. [2023-08-26 11:55:26,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:26,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 203 transitions. [2023-08-26 11:55:26,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,379 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 123 flow. Second operand 3 states and 203 transitions. [2023-08-26 11:55:26,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 233 flow [2023-08-26 11:55:26,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 46 transitions, 225 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:26,382 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 121 flow [2023-08-26 11:55:26,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-08-26 11:55:26,384 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2023-08-26 11:55:26,384 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 121 flow [2023-08-26 11:55:26,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:26,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:55:26,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:55:26,384 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-26 11:55:26,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:26,385 INFO L85 PathProgramCache]: Analyzing trace with hash 412015732, now seen corresponding path program 1 times [2023-08-26 11:55:26,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:26,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812253945] [2023-08-26 11:55:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:26,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:26,463 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 11:55:26,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:26,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812253945] [2023-08-26 11:55:26,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812253945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:26,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:26,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:26,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596038075] [2023-08-26 11:55:26,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:26,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:26,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:26,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:26,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:26,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 154 [2023-08-26 11:55:26,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:26,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 154 [2023-08-26 11:55:26,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:26,531 INFO L124 PetriNetUnfolderBase]: 76/217 cut-off events. [2023-08-26 11:55:26,532 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-08-26 11:55:26,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 217 events. 76/217 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 911 event pairs, 3 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 453. Up to 106 conditions per place. [2023-08-26 11:55:26,533 INFO L140 encePairwiseOnDemand]: 145/154 looper letters, 35 selfloop transitions, 8 changer transitions 1/51 dead transitions. [2023-08-26 11:55:26,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 253 flow [2023-08-26 11:55:26,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:26,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2023-08-26 11:55:26,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2023-08-26 11:55:26,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2023-08-26 11:55:26,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2023-08-26 11:55:26,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:26,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2023-08-26 11:55:26,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,538 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 121 flow. Second operand 3 states and 200 transitions. [2023-08-26 11:55:26,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 253 flow [2023-08-26 11:55:26,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:26,540 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 175 flow [2023-08-26 11:55:26,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2023-08-26 11:55:26,543 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-08-26 11:55:26,545 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 175 flow [2023-08-26 11:55:26,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:26,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:55:26,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:55:26,548 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-26 11:55:26,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:26,549 INFO L85 PathProgramCache]: Analyzing trace with hash -110214342, now seen corresponding path program 1 times [2023-08-26 11:55:26,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:26,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681602547] [2023-08-26 11:55:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:26,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:26,628 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 11:55:26,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:26,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681602547] [2023-08-26 11:55:26,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681602547] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:26,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:26,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:26,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311323383] [2023-08-26 11:55:26,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:26,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:26,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:26,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:26,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:26,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 154 [2023-08-26 11:55:26,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:26,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 154 [2023-08-26 11:55:26,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:26,726 INFO L124 PetriNetUnfolderBase]: 131/301 cut-off events. [2023-08-26 11:55:26,726 INFO L125 PetriNetUnfolderBase]: For 256/256 co-relation queries the response was YES. [2023-08-26 11:55:26,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 301 events. 131/301 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1201 event pairs, 49 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 816. Up to 214 conditions per place. [2023-08-26 11:55:26,728 INFO L140 encePairwiseOnDemand]: 148/154 looper letters, 42 selfloop transitions, 4 changer transitions 14/63 dead transitions. [2023-08-26 11:55:26,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 63 transitions, 381 flow [2023-08-26 11:55:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-08-26 11:55:26,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2023-08-26 11:55:26,730 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-08-26 11:55:26,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-08-26 11:55:26,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:26,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-08-26 11:55:26,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,732 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 175 flow. Second operand 3 states and 228 transitions. [2023-08-26 11:55:26,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 63 transitions, 381 flow [2023-08-26 11:55:26,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 63 transitions, 357 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:26,735 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 171 flow [2023-08-26 11:55:26,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-08-26 11:55:26,735 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-26 11:55:26,736 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 171 flow [2023-08-26 11:55:26,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:26,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:26,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 11:55:26,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:55:26,736 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-08-26 11:55:26,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:26,737 INFO L85 PathProgramCache]: Analyzing trace with hash -112409335, now seen corresponding path program 1 times [2023-08-26 11:55:26,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:26,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873856833] [2023-08-26 11:55:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:26,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:55:26,745 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:55:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:55:26,765 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:55:26,765 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:55:26,766 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 18 remaining) [2023-08-26 11:55:26,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2023-08-26 11:55:26,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2023-08-26 11:55:26,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2023-08-26 11:55:26,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2023-08-26 11:55:26,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (12 of 18 remaining) [2023-08-26 11:55:26,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2023-08-26 11:55:26,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2023-08-26 11:55:26,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2023-08-26 11:55:26,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 18 remaining) [2023-08-26 11:55:26,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 18 remaining) [2023-08-26 11:55:26,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 18 remaining) [2023-08-26 11:55:26,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (5 of 18 remaining) [2023-08-26 11:55:26,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2023-08-26 11:55:26,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2023-08-26 11:55:26,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2023-08-26 11:55:26,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2023-08-26 11:55:26,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (0 of 18 remaining) [2023-08-26 11:55:26,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:55:26,770 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:26,772 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:55:26,773 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 11:55:26,796 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:55:26,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 114 transitions, 240 flow [2023-08-26 11:55:26,817 INFO L124 PetriNetUnfolderBase]: 18/208 cut-off events. [2023-08-26 11:55:26,817 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:55:26,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 208 events. 18/208 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 668 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 135. Up to 6 conditions per place. [2023-08-26 11:55:26,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 114 transitions, 240 flow [2023-08-26 11:55:26,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 114 transitions, 240 flow [2023-08-26 11:55:26,820 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:55:26,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 114 transitions, 240 flow [2023-08-26 11:55:26,821 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 114 transitions, 240 flow [2023-08-26 11:55:26,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 114 transitions, 240 flow [2023-08-26 11:55:26,839 INFO L124 PetriNetUnfolderBase]: 18/208 cut-off events. [2023-08-26 11:55:26,839 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:55:26,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 208 events. 18/208 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 668 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 135. Up to 6 conditions per place. [2023-08-26 11:55:26,844 INFO L119 LiptonReduction]: Number of co-enabled transitions 6200 [2023-08-26 11:55:28,210 INFO L134 LiptonReduction]: Checked pairs total: 23118 [2023-08-26 11:55:28,210 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-26 11:55:28,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:55:28,212 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;@54afbafe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:55:28,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-26 11:55:28,213 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:55:28,213 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:55:28,213 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:55:28,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:28,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:55:28,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:55:28,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:28,214 INFO L85 PathProgramCache]: Analyzing trace with hash 20830, now seen corresponding path program 1 times [2023-08-26 11:55:28,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:28,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660623410] [2023-08-26 11:55:28,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:28,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:28,248 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 11:55:28,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:28,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660623410] [2023-08-26 11:55:28,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660623410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:28,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:28,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:55:28,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379858401] [2023-08-26 11:55:28,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:28,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:28,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:28,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:28,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:28,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 193 [2023-08-26 11:55:28,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:28,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:28,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 193 [2023-08-26 11:55:28,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:28,724 INFO L124 PetriNetUnfolderBase]: 3232/5509 cut-off events. [2023-08-26 11:55:28,724 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-08-26 11:55:28,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10489 conditions, 5509 events. 3232/5509 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 38481 event pairs, 2595 based on Foata normal form. 690/3899 useless extension candidates. Maximal degree in co-relation 1598. Up to 4575 conditions per place. [2023-08-26 11:55:28,755 INFO L140 encePairwiseOnDemand]: 184/193 looper letters, 57 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-26 11:55:28,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 278 flow [2023-08-26 11:55:28,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2023-08-26 11:55:28,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4784110535405872 [2023-08-26 11:55:28,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2023-08-26 11:55:28,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2023-08-26 11:55:28,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:28,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2023-08-26 11:55:28,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:28,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:28,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:28,760 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 140 flow. Second operand 3 states and 277 transitions. [2023-08-26 11:55:28,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 278 flow [2023-08-26 11:55:28,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 276 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 11:55:28,761 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 120 flow [2023-08-26 11:55:28,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-08-26 11:55:28,762 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2023-08-26 11:55:28,762 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 120 flow [2023-08-26 11:55:28,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:28,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:28,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:55:28,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:55:28,763 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:55:28,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:28,763 INFO L85 PathProgramCache]: Analyzing trace with hash 20829, now seen corresponding path program 1 times [2023-08-26 11:55:28,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:28,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550541813] [2023-08-26 11:55:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:28,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:28,781 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 11:55:28,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:28,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550541813] [2023-08-26 11:55:28,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550541813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:28,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:28,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:55:28,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032408768] [2023-08-26 11:55:28,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:28,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:28,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:28,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:28,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:28,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 193 [2023-08-26 11:55:28,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:28,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:28,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 193 [2023-08-26 11:55:28,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:29,253 INFO L124 PetriNetUnfolderBase]: 3154/5451 cut-off events. [2023-08-26 11:55:29,253 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-26 11:55:29,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10511 conditions, 5451 events. 3154/5451 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 38383 event pairs, 1902 based on Foata normal form. 0/3220 useless extension candidates. Maximal degree in co-relation 9680. Up to 3441 conditions per place. [2023-08-26 11:55:29,285 INFO L140 encePairwiseOnDemand]: 187/193 looper letters, 67 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2023-08-26 11:55:29,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 87 transitions, 337 flow [2023-08-26 11:55:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2023-08-26 11:55:29,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46286701208981 [2023-08-26 11:55:29,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2023-08-26 11:55:29,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2023-08-26 11:55:29,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:29,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2023-08-26 11:55:29,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:29,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:29,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:29,293 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 120 flow. Second operand 3 states and 268 transitions. [2023-08-26 11:55:29,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 87 transitions, 337 flow [2023-08-26 11:55:29,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 87 transitions, 333 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:29,300 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 154 flow [2023-08-26 11:55:29,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-08-26 11:55:29,302 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2023-08-26 11:55:29,302 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 154 flow [2023-08-26 11:55:29,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:29,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:29,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:55:29,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 11:55:29,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:55:29,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:29,303 INFO L85 PathProgramCache]: Analyzing trace with hash 646258, now seen corresponding path program 1 times [2023-08-26 11:55:29,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:29,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507386737] [2023-08-26 11:55:29,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:29,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:29,328 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 11:55:29,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:29,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507386737] [2023-08-26 11:55:29,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507386737] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:29,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:29,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:29,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599468899] [2023-08-26 11:55:29,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:29,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:29,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:29,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:29,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 193 [2023-08-26 11:55:29,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:29,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:29,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 193 [2023-08-26 11:55:29,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:29,762 INFO L124 PetriNetUnfolderBase]: 3144/5532 cut-off events. [2023-08-26 11:55:29,762 INFO L125 PetriNetUnfolderBase]: For 724/729 co-relation queries the response was YES. [2023-08-26 11:55:29,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11485 conditions, 5532 events. 3144/5532 cut-off events. For 724/729 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 40542 event pairs, 994 based on Foata normal form. 0/3511 useless extension candidates. Maximal degree in co-relation 6317. Up to 2986 conditions per place. [2023-08-26 11:55:29,793 INFO L140 encePairwiseOnDemand]: 184/193 looper letters, 65 selfloop transitions, 10 changer transitions 0/89 dead transitions. [2023-08-26 11:55:29,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 89 transitions, 382 flow [2023-08-26 11:55:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-08-26 11:55:29,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459412780656304 [2023-08-26 11:55:29,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-08-26 11:55:29,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-08-26 11:55:29,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:29,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-08-26 11:55:29,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:29,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:29,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:29,798 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 154 flow. Second operand 3 states and 266 transitions. [2023-08-26 11:55:29,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 89 transitions, 382 flow [2023-08-26 11:55:29,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 89 transitions, 368 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:29,802 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 230 flow [2023-08-26 11:55:29,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2023-08-26 11:55:29,803 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2023-08-26 11:55:29,803 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 230 flow [2023-08-26 11:55:29,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:29,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:29,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:55:29,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 11:55:29,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:55:29,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:29,804 INFO L85 PathProgramCache]: Analyzing trace with hash 646259, now seen corresponding path program 1 times [2023-08-26 11:55:29,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:29,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755823137] [2023-08-26 11:55:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:29,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:29,863 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 11:55:29,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:29,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755823137] [2023-08-26 11:55:29,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755823137] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:29,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:29,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:29,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125479559] [2023-08-26 11:55:29,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:29,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:29,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:29,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:29,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:29,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 193 [2023-08-26 11:55:29,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:29,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:29,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 193 [2023-08-26 11:55:29,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:30,242 INFO L124 PetriNetUnfolderBase]: 2620/4645 cut-off events. [2023-08-26 11:55:30,243 INFO L125 PetriNetUnfolderBase]: For 1653/1659 co-relation queries the response was YES. [2023-08-26 11:55:30,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10869 conditions, 4645 events. 2620/4645 cut-off events. For 1653/1659 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32734 event pairs, 877 based on Foata normal form. 304/3452 useless extension candidates. Maximal degree in co-relation 4591. Up to 2699 conditions per place. [2023-08-26 11:55:30,267 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 66 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2023-08-26 11:55:30,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 84 transitions, 416 flow [2023-08-26 11:55:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-08-26 11:55:30,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46113989637305697 [2023-08-26 11:55:30,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-08-26 11:55:30,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-08-26 11:55:30,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:30,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-08-26 11:55:30,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:30,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:30,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:30,272 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 230 flow. Second operand 3 states and 267 transitions. [2023-08-26 11:55:30,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 84 transitions, 416 flow [2023-08-26 11:55:30,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 84 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:30,278 INFO L231 Difference]: Finished difference. Result has 59 places, 63 transitions, 214 flow [2023-08-26 11:55:30,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=59, PETRI_TRANSITIONS=63} [2023-08-26 11:55:30,279 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2023-08-26 11:55:30,279 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 63 transitions, 214 flow [2023-08-26 11:55:30,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:30,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:30,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:55:30,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:55:30,280 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:55:30,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:30,280 INFO L85 PathProgramCache]: Analyzing trace with hash 621024664, now seen corresponding path program 1 times [2023-08-26 11:55:30,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:30,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5708230] [2023-08-26 11:55:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:30,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:30,307 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 11:55:30,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:30,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5708230] [2023-08-26 11:55:30,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5708230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:30,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:30,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:30,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405552607] [2023-08-26 11:55:30,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:30,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:30,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:30,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:30,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:30,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 193 [2023-08-26 11:55:30,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 63 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:30,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:30,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 193 [2023-08-26 11:55:30,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:30,736 INFO L124 PetriNetUnfolderBase]: 2898/5284 cut-off events. [2023-08-26 11:55:30,737 INFO L125 PetriNetUnfolderBase]: For 2088/2088 co-relation queries the response was YES. [2023-08-26 11:55:30,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11978 conditions, 5284 events. 2898/5284 cut-off events. For 2088/2088 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 40760 event pairs, 599 based on Foata normal form. 0/3558 useless extension candidates. Maximal degree in co-relation 10201. Up to 2608 conditions per place. [2023-08-26 11:55:30,762 INFO L140 encePairwiseOnDemand]: 183/193 looper letters, 78 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2023-08-26 11:55:30,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 106 transitions, 559 flow [2023-08-26 11:55:30,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:30,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2023-08-26 11:55:30,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680483592400691 [2023-08-26 11:55:30,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2023-08-26 11:55:30,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2023-08-26 11:55:30,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:30,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2023-08-26 11:55:30,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:30,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:30,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:30,766 INFO L175 Difference]: Start difference. First operand has 59 places, 63 transitions, 214 flow. Second operand 3 states and 271 transitions. [2023-08-26 11:55:30,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 106 transitions, 559 flow [2023-08-26 11:55:30,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 106 transitions, 543 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:30,769 INFO L231 Difference]: Finished difference. Result has 61 places, 76 transitions, 358 flow [2023-08-26 11:55:30,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=61, PETRI_TRANSITIONS=76} [2023-08-26 11:55:30,770 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2023-08-26 11:55:30,770 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 76 transitions, 358 flow [2023-08-26 11:55:30,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:30,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:30,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:55:30,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 11:55:30,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:55:30,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:30,771 INFO L85 PathProgramCache]: Analyzing trace with hash 621024665, now seen corresponding path program 1 times [2023-08-26 11:55:30,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:30,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123605540] [2023-08-26 11:55:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:30,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:55:30,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:30,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123605540] [2023-08-26 11:55:30,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123605540] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:30,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:30,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:30,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601083705] [2023-08-26 11:55:30,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:30,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:30,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:30,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:30,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:30,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 193 [2023-08-26 11:55:30,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 76 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:30,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:30,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 193 [2023-08-26 11:55:30,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:31,217 INFO L124 PetriNetUnfolderBase]: 2287/4209 cut-off events. [2023-08-26 11:55:31,217 INFO L125 PetriNetUnfolderBase]: For 3144/3153 co-relation queries the response was YES. [2023-08-26 11:55:31,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11202 conditions, 4209 events. 2287/4209 cut-off events. For 3144/3153 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 30828 event pairs, 572 based on Foata normal form. 340/3460 useless extension candidates. Maximal degree in co-relation 9637. Up to 2625 conditions per place. [2023-08-26 11:55:31,241 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 81 selfloop transitions, 8 changer transitions 0/103 dead transitions. [2023-08-26 11:55:31,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 103 transitions, 637 flow [2023-08-26 11:55:31,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:31,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:31,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2023-08-26 11:55:31,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680483592400691 [2023-08-26 11:55:31,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2023-08-26 11:55:31,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2023-08-26 11:55:31,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:31,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2023-08-26 11:55:31,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:31,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:31,245 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:31,245 INFO L175 Difference]: Start difference. First operand has 61 places, 76 transitions, 358 flow. Second operand 3 states and 271 transitions. [2023-08-26 11:55:31,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 103 transitions, 637 flow [2023-08-26 11:55:31,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 103 transitions, 607 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:31,255 INFO L231 Difference]: Finished difference. Result has 59 places, 74 transitions, 340 flow [2023-08-26 11:55:31,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=340, PETRI_PLACES=59, PETRI_TRANSITIONS=74} [2023-08-26 11:55:31,256 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2023-08-26 11:55:31,256 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 74 transitions, 340 flow [2023-08-26 11:55:31,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:31,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:31,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:55:31,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 11:55:31,257 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:55:31,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:31,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2073318215, now seen corresponding path program 1 times [2023-08-26 11:55:31,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:31,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551817476] [2023-08-26 11:55:31,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:31,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:31,312 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 11:55:31,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:31,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551817476] [2023-08-26 11:55:31,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551817476] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:31,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:31,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:31,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137664490] [2023-08-26 11:55:31,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:31,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:31,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:31,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:31,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:31,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 193 [2023-08-26 11:55:31,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 74 transitions, 340 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:31,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:31,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 193 [2023-08-26 11:55:31,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:31,903 INFO L124 PetriNetUnfolderBase]: 4471/7409 cut-off events. [2023-08-26 11:55:31,903 INFO L125 PetriNetUnfolderBase]: For 5919/5947 co-relation queries the response was YES. [2023-08-26 11:55:31,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19695 conditions, 7409 events. 4471/7409 cut-off events. For 5919/5947 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 48021 event pairs, 1841 based on Foata normal form. 0/5902 useless extension candidates. Maximal degree in co-relation 10360. Up to 5003 conditions per place. [2023-08-26 11:55:31,933 INFO L140 encePairwiseOnDemand]: 182/193 looper letters, 108 selfloop transitions, 6 changer transitions 11/132 dead transitions. [2023-08-26 11:55:31,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 132 transitions, 873 flow [2023-08-26 11:55:31,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:31,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 295 transitions. [2023-08-26 11:55:31,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094991364421416 [2023-08-26 11:55:31,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 295 transitions. [2023-08-26 11:55:31,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 295 transitions. [2023-08-26 11:55:31,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:31,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 295 transitions. [2023-08-26 11:55:31,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:31,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:31,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:31,938 INFO L175 Difference]: Start difference. First operand has 59 places, 74 transitions, 340 flow. Second operand 3 states and 295 transitions. [2023-08-26 11:55:31,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 132 transitions, 873 flow [2023-08-26 11:55:31,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 132 transitions, 843 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:31,948 INFO L231 Difference]: Finished difference. Result has 61 places, 80 transitions, 382 flow [2023-08-26 11:55:31,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=382, PETRI_PLACES=61, PETRI_TRANSITIONS=80} [2023-08-26 11:55:31,948 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2023-08-26 11:55:31,948 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 80 transitions, 382 flow [2023-08-26 11:55:31,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:31,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:31,949 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:31,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 11:55:31,949 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:55:31,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1254360927, now seen corresponding path program 1 times [2023-08-26 11:55:31,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:31,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515115117] [2023-08-26 11:55:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:55:32,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:32,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515115117] [2023-08-26 11:55:32,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515115117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:32,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:32,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:32,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660738546] [2023-08-26 11:55:32,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:32,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:32,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:32,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:32,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:32,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 193 [2023-08-26 11:55:32,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 80 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:32,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:32,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 193 [2023-08-26 11:55:32,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:32,354 INFO L124 PetriNetUnfolderBase]: 2093/4040 cut-off events. [2023-08-26 11:55:32,354 INFO L125 PetriNetUnfolderBase]: For 3446/3771 co-relation queries the response was YES. [2023-08-26 11:55:32,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11414 conditions, 4040 events. 2093/4040 cut-off events. For 3446/3771 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 29486 event pairs, 420 based on Foata normal form. 170/3333 useless extension candidates. Maximal degree in co-relation 3917. Up to 2212 conditions per place. [2023-08-26 11:55:32,379 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 84 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2023-08-26 11:55:32,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 112 transitions, 726 flow [2023-08-26 11:55:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:32,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-08-26 11:55:32,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45768566493955093 [2023-08-26 11:55:32,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-08-26 11:55:32,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-08-26 11:55:32,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:32,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-08-26 11:55:32,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:32,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:32,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:32,384 INFO L175 Difference]: Start difference. First operand has 61 places, 80 transitions, 382 flow. Second operand 3 states and 265 transitions. [2023-08-26 11:55:32,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 112 transitions, 726 flow [2023-08-26 11:55:32,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 112 transitions, 714 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:32,390 INFO L231 Difference]: Finished difference. Result has 59 places, 78 transitions, 382 flow [2023-08-26 11:55:32,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=382, PETRI_PLACES=59, PETRI_TRANSITIONS=78} [2023-08-26 11:55:32,391 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2023-08-26 11:55:32,391 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 78 transitions, 382 flow [2023-08-26 11:55:32,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:32,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:32,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:32,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 11:55:32,391 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:55:32,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:32,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1254360926, now seen corresponding path program 1 times [2023-08-26 11:55:32,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:32,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371603319] [2023-08-26 11:55:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:32,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:55:32,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:32,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371603319] [2023-08-26 11:55:32,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371603319] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:32,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:32,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:32,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963460346] [2023-08-26 11:55:32,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:32,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:32,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:32,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:32,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:32,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 193 [2023-08-26 11:55:32,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 78 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:32,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:32,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 193 [2023-08-26 11:55:32,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:32,824 INFO L124 PetriNetUnfolderBase]: 2315/4522 cut-off events. [2023-08-26 11:55:32,825 INFO L125 PetriNetUnfolderBase]: For 3646/3920 co-relation queries the response was YES. [2023-08-26 11:55:32,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12548 conditions, 4522 events. 2315/4522 cut-off events. For 3646/3920 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 34060 event pairs, 454 based on Foata normal form. 197/3760 useless extension candidates. Maximal degree in co-relation 3883. Up to 2130 conditions per place. [2023-08-26 11:55:32,849 INFO L140 encePairwiseOnDemand]: 183/193 looper letters, 85 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2023-08-26 11:55:32,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 124 transitions, 820 flow [2023-08-26 11:55:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2023-08-26 11:55:32,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45595854922279794 [2023-08-26 11:55:32,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2023-08-26 11:55:32,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2023-08-26 11:55:32,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:32,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2023-08-26 11:55:32,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:32,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:32,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:32,854 INFO L175 Difference]: Start difference. First operand has 59 places, 78 transitions, 382 flow. Second operand 3 states and 264 transitions. [2023-08-26 11:55:32,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 124 transitions, 820 flow [2023-08-26 11:55:32,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 124 transitions, 796 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:32,859 INFO L231 Difference]: Finished difference. Result has 61 places, 95 transitions, 596 flow [2023-08-26 11:55:32,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=596, PETRI_PLACES=61, PETRI_TRANSITIONS=95} [2023-08-26 11:55:32,859 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2023-08-26 11:55:32,859 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 95 transitions, 596 flow [2023-08-26 11:55:32,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:32,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:32,860 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 11:55:32,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 11:55:32,861 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:55:32,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1448787537, now seen corresponding path program 1 times [2023-08-26 11:55:32,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:32,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625682173] [2023-08-26 11:55:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:32,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:55:32,877 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:55:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:55:32,886 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:55:32,886 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:55:32,886 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (22 of 23 remaining) [2023-08-26 11:55:32,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-26 11:55:32,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-26 11:55:32,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-26 11:55:32,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-26 11:55:32,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (17 of 23 remaining) [2023-08-26 11:55:32,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-26 11:55:32,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-26 11:55:32,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-26 11:55:32,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2023-08-26 11:55:32,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2023-08-26 11:55:32,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 23 remaining) [2023-08-26 11:55:32,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (10 of 23 remaining) [2023-08-26 11:55:32,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-26 11:55:32,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 23 remaining) [2023-08-26 11:55:32,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2023-08-26 11:55:32,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-26 11:55:32,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (5 of 23 remaining) [2023-08-26 11:55:32,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-26 11:55:32,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-26 11:55:32,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 23 remaining) [2023-08-26 11:55:32,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-26 11:55:32,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (0 of 23 remaining) [2023-08-26 11:55:32,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 11:55:32,890 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:32,890 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:55:32,890 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 11:55:32,924 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:55:32,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 140 transitions, 301 flow [2023-08-26 11:55:32,958 INFO L124 PetriNetUnfolderBase]: 25/282 cut-off events. [2023-08-26 11:55:32,958 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:55:32,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 282 events. 25/282 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1000 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 212. Up to 8 conditions per place. [2023-08-26 11:55:32,960 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 140 transitions, 301 flow [2023-08-26 11:55:32,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 140 transitions, 301 flow [2023-08-26 11:55:32,963 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:55:32,963 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 140 transitions, 301 flow [2023-08-26 11:55:32,963 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 140 transitions, 301 flow [2023-08-26 11:55:32,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 140 transitions, 301 flow [2023-08-26 11:55:32,987 INFO L124 PetriNetUnfolderBase]: 25/282 cut-off events. [2023-08-26 11:55:32,988 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:55:32,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 282 events. 25/282 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1000 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 212. Up to 8 conditions per place. [2023-08-26 11:55:32,997 INFO L119 LiptonReduction]: Number of co-enabled transitions 11250 [2023-08-26 11:55:34,375 INFO L134 LiptonReduction]: Checked pairs total: 44444 [2023-08-26 11:55:34,375 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-26 11:55:34,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:55:34,377 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;@54afbafe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:55:34,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2023-08-26 11:55:34,378 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:55:34,378 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:55:34,378 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:55:34,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:34,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:55:34,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-08-26 11:55:34,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:34,379 INFO L85 PathProgramCache]: Analyzing trace with hash 29149, now seen corresponding path program 1 times [2023-08-26 11:55:34,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:34,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120914636] [2023-08-26 11:55:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:34,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:34,395 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 11:55:34,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:34,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120914636] [2023-08-26 11:55:34,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120914636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:34,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:34,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:55:34,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283619663] [2023-08-26 11:55:34,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:34,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:34,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:34,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:34,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 234 [2023-08-26 11:55:34,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:34,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:34,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 234 [2023-08-26 11:55:34,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:40,145 INFO L124 PetriNetUnfolderBase]: 60467/88934 cut-off events. [2023-08-26 11:55:40,145 INFO L125 PetriNetUnfolderBase]: For 1652/1652 co-relation queries the response was YES. [2023-08-26 11:55:40,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172503 conditions, 88934 events. 60467/88934 cut-off events. For 1652/1652 co-relation queries the response was YES. Maximal size of possible extension queue 4067. Compared 726402 event pairs, 35124 based on Foata normal form. 12387/63023 useless extension candidates. Maximal degree in co-relation 11239. Up to 54651 conditions per place. [2023-08-26 11:55:40,718 INFO L140 encePairwiseOnDemand]: 219/234 looper letters, 92 selfloop transitions, 6 changer transitions 0/117 dead transitions. [2023-08-26 11:55:40,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 117 transitions, 463 flow [2023-08-26 11:55:40,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2023-08-26 11:55:40,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49715099715099714 [2023-08-26 11:55:40,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2023-08-26 11:55:40,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2023-08-26 11:55:40,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:40,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2023-08-26 11:55:40,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:40,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:40,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:40,722 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 187 flow. Second operand 3 states and 349 transitions. [2023-08-26 11:55:40,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 117 transitions, 463 flow [2023-08-26 11:55:40,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 117 transitions, 455 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-26 11:55:40,727 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 201 flow [2023-08-26 11:55:40,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2023-08-26 11:55:40,727 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2023-08-26 11:55:40,728 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 201 flow [2023-08-26 11:55:40,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:40,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:40,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:55:40,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 11:55:40,728 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-08-26 11:55:40,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:40,729 INFO L85 PathProgramCache]: Analyzing trace with hash 29147, now seen corresponding path program 1 times [2023-08-26 11:55:40,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:40,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228042285] [2023-08-26 11:55:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:40,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:40,764 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 11:55:40,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:40,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228042285] [2023-08-26 11:55:40,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228042285] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:40,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:40,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:55:40,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500171126] [2023-08-26 11:55:40,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:40,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:40,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:40,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:40,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:40,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 234 [2023-08-26 11:55:40,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:40,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:40,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 234 [2023-08-26 11:55:40,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:46,189 INFO L124 PetriNetUnfolderBase]: 56166/83434 cut-off events. [2023-08-26 11:55:46,189 INFO L125 PetriNetUnfolderBase]: For 14599/14705 co-relation queries the response was YES. [2023-08-26 11:55:46,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174406 conditions, 83434 events. 56166/83434 cut-off events. For 14599/14705 co-relation queries the response was YES. Maximal size of possible extension queue 3755. Compared 682099 event pairs, 44487 based on Foata normal form. 0/50281 useless extension candidates. Maximal degree in co-relation 92344. Up to 71041 conditions per place. [2023-08-26 11:55:46,627 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 85 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-26 11:55:46,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 443 flow [2023-08-26 11:55:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:46,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:46,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2023-08-26 11:55:46,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47293447293447294 [2023-08-26 11:55:46,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2023-08-26 11:55:46,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2023-08-26 11:55:46,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:46,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2023-08-26 11:55:46,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:46,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:46,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:46,632 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 201 flow. Second operand 3 states and 332 transitions. [2023-08-26 11:55:46,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 443 flow [2023-08-26 11:55:46,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 106 transitions, 431 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:46,754 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 191 flow [2023-08-26 11:55:46,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2023-08-26 11:55:46,755 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2023-08-26 11:55:46,755 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 191 flow [2023-08-26 11:55:46,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:46,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:46,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:55:46,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 11:55:46,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-08-26 11:55:46,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash 904397, now seen corresponding path program 1 times [2023-08-26 11:55:46,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:46,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226534716] [2023-08-26 11:55:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:46,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:55:46,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:46,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226534716] [2023-08-26 11:55:46,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226534716] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:46,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:46,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:46,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123779384] [2023-08-26 11:55:46,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:46,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:46,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:46,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 234 [2023-08-26 11:55:46,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:46,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:46,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 234 [2023-08-26 11:55:46,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:52,375 INFO L124 PetriNetUnfolderBase]: 58906/88401 cut-off events. [2023-08-26 11:55:52,376 INFO L125 PetriNetUnfolderBase]: For 7415/7477 co-relation queries the response was YES. [2023-08-26 11:55:52,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180457 conditions, 88401 events. 58906/88401 cut-off events. For 7415/7477 co-relation queries the response was YES. Maximal size of possible extension queue 3981. Compared 752475 event pairs, 19020 based on Foata normal form. 0/53976 useless extension candidates. Maximal degree in co-relation 168005. Up to 46038 conditions per place. [2023-08-26 11:55:52,997 INFO L140 encePairwiseOnDemand]: 224/234 looper letters, 88 selfloop transitions, 12 changer transitions 0/118 dead transitions. [2023-08-26 11:55:52,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 118 transitions, 493 flow [2023-08-26 11:55:52,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:52,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:52,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-08-26 11:55:53,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672364672364672 [2023-08-26 11:55:53,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-08-26 11:55:53,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-08-26 11:55:53,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:53,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-08-26 11:55:53,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:53,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:53,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:53,014 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 191 flow. Second operand 3 states and 328 transitions. [2023-08-26 11:55:53,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 118 transitions, 493 flow [2023-08-26 11:55:53,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 118 transitions, 489 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:53,049 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 293 flow [2023-08-26 11:55:53,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2023-08-26 11:55:53,049 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-26 11:55:53,049 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 293 flow [2023-08-26 11:55:53,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:53,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:53,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:55:53,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 11:55:53,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-08-26 11:55:53,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:53,050 INFO L85 PathProgramCache]: Analyzing trace with hash 904398, now seen corresponding path program 1 times [2023-08-26 11:55:53,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:53,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241597318] [2023-08-26 11:55:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:53,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:53,085 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 11:55:53,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:53,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241597318] [2023-08-26 11:55:53,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241597318] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:53,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:53,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:53,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625506341] [2023-08-26 11:55:53,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:53,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:53,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:53,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:53,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:53,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 234 [2023-08-26 11:55:53,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:53,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:53,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 234 [2023-08-26 11:55:53,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:57,607 INFO L124 PetriNetUnfolderBase]: 48962/74071 cut-off events. [2023-08-26 11:55:57,607 INFO L125 PetriNetUnfolderBase]: For 23688/23812 co-relation queries the response was YES. [2023-08-26 11:55:57,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170910 conditions, 74071 events. 48962/74071 cut-off events. For 23688/23812 co-relation queries the response was YES. Maximal size of possible extension queue 3399. Compared 618624 event pairs, 14553 based on Foata normal form. 3744/51890 useless extension candidates. Maximal degree in co-relation 42069. Up to 44609 conditions per place. [2023-08-26 11:55:57,979 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 92 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2023-08-26 11:55:57,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 114 transitions, 557 flow [2023-08-26 11:55:57,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:57,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:57,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2023-08-26 11:55:57,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47293447293447294 [2023-08-26 11:55:57,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2023-08-26 11:55:57,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2023-08-26 11:55:57,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:57,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2023-08-26 11:55:57,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:57,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:57,983 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:57,983 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 293 flow. Second operand 3 states and 332 transitions. [2023-08-26 11:55:57,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 114 transitions, 557 flow [2023-08-26 11:55:58,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 114 transitions, 533 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:55:58,196 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 273 flow [2023-08-26 11:55:58,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2023-08-26 11:55:58,197 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2023-08-26 11:55:58,197 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 273 flow [2023-08-26 11:55:58,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:58,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:58,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:55:58,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 11:55:58,198 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-08-26 11:55:58,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:58,198 INFO L85 PathProgramCache]: Analyzing trace with hash 869128547, now seen corresponding path program 1 times [2023-08-26 11:55:58,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:58,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048247292] [2023-08-26 11:55:58,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:58,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:58,231 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 11:55:58,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:58,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048247292] [2023-08-26 11:55:58,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048247292] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:58,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:58,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:58,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477741829] [2023-08-26 11:55:58,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:58,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:58,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:58,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:58,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:58,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 234 [2023-08-26 11:55:58,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:58,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:58,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 234 [2023-08-26 11:55:58,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:04,083 INFO L124 PetriNetUnfolderBase]: 60813/92446 cut-off events. [2023-08-26 11:56:04,084 INFO L125 PetriNetUnfolderBase]: For 34717/34731 co-relation queries the response was YES. [2023-08-26 11:56:04,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209240 conditions, 92446 events. 60813/92446 cut-off events. For 34717/34731 co-relation queries the response was YES. Maximal size of possible extension queue 4842. Compared 823739 event pairs, 16499 based on Foata normal form. 1/58566 useless extension candidates. Maximal degree in co-relation 200675. Up to 44192 conditions per place. [2023-08-26 11:56:04,711 INFO L140 encePairwiseOnDemand]: 223/234 looper letters, 105 selfloop transitions, 20 changer transitions 0/142 dead transitions. [2023-08-26 11:56:04,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 142 transitions, 745 flow [2023-08-26 11:56:04,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-08-26 11:56:04,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4757834757834758 [2023-08-26 11:56:04,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-08-26 11:56:04,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-08-26 11:56:04,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:04,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-08-26 11:56:04,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:04,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:04,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:04,715 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 273 flow. Second operand 3 states and 334 transitions. [2023-08-26 11:56:04,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 142 transitions, 745 flow [2023-08-26 11:56:04,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 142 transitions, 729 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:56:04,740 INFO L231 Difference]: Finished difference. Result has 78 places, 101 transitions, 485 flow [2023-08-26 11:56:04,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=485, PETRI_PLACES=78, PETRI_TRANSITIONS=101} [2023-08-26 11:56:04,740 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-26 11:56:04,740 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 101 transitions, 485 flow [2023-08-26 11:56:04,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:04,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:04,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:56:04,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 11:56:04,741 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-08-26 11:56:04,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:04,741 INFO L85 PathProgramCache]: Analyzing trace with hash 869128548, now seen corresponding path program 1 times [2023-08-26 11:56:04,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:04,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2256734] [2023-08-26 11:56:04,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:04,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:04,823 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 11:56:04,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:04,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2256734] [2023-08-26 11:56:04,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2256734] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:04,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:04,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:56:04,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348273680] [2023-08-26 11:56:04,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:04,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:56:04,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:04,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:56:04,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:56:04,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 234 [2023-08-26 11:56:04,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 101 transitions, 485 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:04,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:04,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 234 [2023-08-26 11:56:04,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:09,539 INFO L124 PetriNetUnfolderBase]: 48742/73573 cut-off events. [2023-08-26 11:56:09,539 INFO L125 PetriNetUnfolderBase]: For 53690/53872 co-relation queries the response was YES. [2023-08-26 11:56:09,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191350 conditions, 73573 events. 48742/73573 cut-off events. For 53690/53872 co-relation queries the response was YES. Maximal size of possible extension queue 3852. Compared 618918 event pairs, 13819 based on Foata normal form. 4280/54489 useless extension candidates. Maximal degree in co-relation 184902. Up to 51958 conditions per place. [2023-08-26 11:56:09,940 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 118 selfloop transitions, 9 changer transitions 0/145 dead transitions. [2023-08-26 11:56:09,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 145 transitions, 921 flow [2023-08-26 11:56:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:09,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:09,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-08-26 11:56:09,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47863247863247865 [2023-08-26 11:56:09,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-08-26 11:56:09,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-08-26 11:56:09,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:09,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-08-26 11:56:09,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:09,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:09,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:09,944 INFO L175 Difference]: Start difference. First operand has 78 places, 101 transitions, 485 flow. Second operand 3 states and 336 transitions. [2023-08-26 11:56:09,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 145 transitions, 921 flow [2023-08-26 11:56:10,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 145 transitions, 881 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:56:10,024 INFO L231 Difference]: Finished difference. Result has 76 places, 99 transitions, 459 flow [2023-08-26 11:56:10,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=459, PETRI_PLACES=76, PETRI_TRANSITIONS=99} [2023-08-26 11:56:10,024 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2023-08-26 11:56:10,024 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 99 transitions, 459 flow [2023-08-26 11:56:10,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:10,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:10,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:56:10,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 11:56:10,025 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-08-26 11:56:10,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:10,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1173820071, now seen corresponding path program 1 times [2023-08-26 11:56:10,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:10,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225216997] [2023-08-26 11:56:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:10,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:10,057 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 11:56:10,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:10,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225216997] [2023-08-26 11:56:10,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225216997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:10,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:10,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:56:10,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62698991] [2023-08-26 11:56:10,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:10,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:56:10,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:10,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:56:10,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:56:10,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 234 [2023-08-26 11:56:10,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 99 transitions, 459 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:10,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:10,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 234 [2023-08-26 11:56:10,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:20,407 INFO L124 PetriNetUnfolderBase]: 117355/167420 cut-off events. [2023-08-26 11:56:20,408 INFO L125 PetriNetUnfolderBase]: For 124604/125605 co-relation queries the response was YES. [2023-08-26 11:56:20,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430098 conditions, 167420 events. 117355/167420 cut-off events. For 124604/125605 co-relation queries the response was YES. Maximal size of possible extension queue 4921. Compared 1265656 event pairs, 49837 based on Foata normal form. 1/127355 useless extension candidates. Maximal degree in co-relation 232376. Up to 110020 conditions per place. [2023-08-26 11:56:21,190 INFO L140 encePairwiseOnDemand]: 219/234 looper letters, 163 selfloop transitions, 8 changer transitions 0/180 dead transitions. [2023-08-26 11:56:21,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 180 transitions, 1213 flow [2023-08-26 11:56:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:21,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-26 11:56:21,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113960113960114 [2023-08-26 11:56:21,192 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-26 11:56:21,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-26 11:56:21,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:21,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-26 11:56:21,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:21,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:21,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:21,195 INFO L175 Difference]: Start difference. First operand has 76 places, 99 transitions, 459 flow. Second operand 3 states and 359 transitions. [2023-08-26 11:56:21,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 180 transitions, 1213 flow [2023-08-26 11:56:21,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 180 transitions, 1177 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:56:21,367 INFO L231 Difference]: Finished difference. Result has 78 places, 107 transitions, 519 flow [2023-08-26 11:56:21,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=519, PETRI_PLACES=78, PETRI_TRANSITIONS=107} [2023-08-26 11:56:21,367 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-26 11:56:21,367 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 107 transitions, 519 flow [2023-08-26 11:56:21,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:21,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:21,368 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:56:21,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 11:56:21,368 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-08-26 11:56:21,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:21,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1319379833, now seen corresponding path program 1 times [2023-08-26 11:56:21,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:21,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670511862] [2023-08-26 11:56:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:21,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:56:21,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:21,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670511862] [2023-08-26 11:56:21,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670511862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:21,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:21,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:56:21,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053716515] [2023-08-26 11:56:21,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:21,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:56:21,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:21,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:56:21,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:56:21,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 234 [2023-08-26 11:56:21,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 107 transitions, 519 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:21,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:21,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 234 [2023-08-26 11:56:21,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:26,913 INFO L124 PetriNetUnfolderBase]: 53004/84547 cut-off events. [2023-08-26 11:56:26,913 INFO L125 PetriNetUnfolderBase]: For 68652/75875 co-relation queries the response was YES. [2023-08-26 11:56:27,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232597 conditions, 84547 events. 53004/84547 cut-off events. For 68652/75875 co-relation queries the response was YES. Maximal size of possible extension queue 4209. Compared 764499 event pairs, 13768 based on Foata normal form. 3158/65130 useless extension candidates. Maximal degree in co-relation 95011. Up to 47016 conditions per place. [2023-08-26 11:56:27,634 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 128 selfloop transitions, 9 changer transitions 0/163 dead transitions. [2023-08-26 11:56:27,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 163 transitions, 1084 flow [2023-08-26 11:56:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2023-08-26 11:56:27,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47293447293447294 [2023-08-26 11:56:27,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2023-08-26 11:56:27,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2023-08-26 11:56:27,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:27,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2023-08-26 11:56:27,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:27,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:27,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:27,639 INFO L175 Difference]: Start difference. First operand has 78 places, 107 transitions, 519 flow. Second operand 3 states and 332 transitions. [2023-08-26 11:56:27,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 163 transitions, 1084 flow [2023-08-26 11:56:27,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 163 transitions, 1068 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:56:27,688 INFO L231 Difference]: Finished difference. Result has 76 places, 105 transitions, 517 flow [2023-08-26 11:56:27,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=517, PETRI_PLACES=76, PETRI_TRANSITIONS=105} [2023-08-26 11:56:27,688 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2023-08-26 11:56:27,688 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 105 transitions, 517 flow [2023-08-26 11:56:27,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:27,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:27,689 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:56:27,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-26 11:56:27,689 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-08-26 11:56:27,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1319379832, now seen corresponding path program 1 times [2023-08-26 11:56:27,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:27,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831292041] [2023-08-26 11:56:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:27,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:56:27,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:27,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831292041] [2023-08-26 11:56:27,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831292041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:27,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:27,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:56:27,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3912067] [2023-08-26 11:56:27,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:27,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:56:27,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:27,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:56:27,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:56:27,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 234 [2023-08-26 11:56:27,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 105 transitions, 517 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:27,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:27,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 234 [2023-08-26 11:56:27,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:34,711 INFO L124 PetriNetUnfolderBase]: 64504/104499 cut-off events. [2023-08-26 11:56:34,711 INFO L125 PetriNetUnfolderBase]: For 86686/93399 co-relation queries the response was YES. [2023-08-26 11:56:35,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280164 conditions, 104499 events. 64504/104499 cut-off events. For 86686/93399 co-relation queries the response was YES. Maximal size of possible extension queue 5444. Compared 993961 event pairs, 19768 based on Foata normal form. 3920/81097 useless extension candidates. Maximal degree in co-relation 103093. Up to 51393 conditions per place. [2023-08-26 11:56:35,324 INFO L140 encePairwiseOnDemand]: 223/234 looper letters, 119 selfloop transitions, 34 changer transitions 0/177 dead transitions. [2023-08-26 11:56:35,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 177 transitions, 1208 flow [2023-08-26 11:56:35,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-26 11:56:35,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658119658119658 [2023-08-26 11:56:35,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-26 11:56:35,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-26 11:56:35,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:35,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-26 11:56:35,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:35,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:35,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:35,327 INFO L175 Difference]: Start difference. First operand has 76 places, 105 transitions, 517 flow. Second operand 3 states and 327 transitions. [2023-08-26 11:56:35,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 177 transitions, 1208 flow [2023-08-26 11:56:35,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 177 transitions, 1176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:56:35,348 INFO L231 Difference]: Finished difference. Result has 78 places, 137 transitions, 933 flow [2023-08-26 11:56:35,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=933, PETRI_PLACES=78, PETRI_TRANSITIONS=137} [2023-08-26 11:56:35,349 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-26 11:56:35,349 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 137 transitions, 933 flow [2023-08-26 11:56:35,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:35,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:35,349 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 11:56:35,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 11:56:35,349 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-08-26 11:56:35,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:35,350 INFO L85 PathProgramCache]: Analyzing trace with hash 210954841, now seen corresponding path program 1 times [2023-08-26 11:56:35,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:35,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557128845] [2023-08-26 11:56:35,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:35,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 11:56:35,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:35,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557128845] [2023-08-26 11:56:35,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557128845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:35,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:35,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:56:35,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825377198] [2023-08-26 11:56:35,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:35,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:56:35,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:35,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:56:35,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:56:35,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 234 [2023-08-26 11:56:35,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 137 transitions, 933 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:35,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:35,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 234 [2023-08-26 11:56:35,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:45,425 INFO L124 PetriNetUnfolderBase]: 86701/138418 cut-off events. [2023-08-26 11:56:45,425 INFO L125 PetriNetUnfolderBase]: For 211694/221924 co-relation queries the response was YES. [2023-08-26 11:56:46,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418068 conditions, 138418 events. 86701/138418 cut-off events. For 211694/221924 co-relation queries the response was YES. Maximal size of possible extension queue 7293. Compared 1328394 event pairs, 20527 based on Foata normal form. 5932/108931 useless extension candidates. Maximal degree in co-relation 156852. Up to 69965 conditions per place. [2023-08-26 11:56:46,554 INFO L140 encePairwiseOnDemand]: 223/234 looper letters, 151 selfloop transitions, 57 changer transitions 0/231 dead transitions. [2023-08-26 11:56:46,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 231 transitions, 2025 flow [2023-08-26 11:56:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-08-26 11:56:46,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672364672364672 [2023-08-26 11:56:46,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-08-26 11:56:46,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-08-26 11:56:46,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:46,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-08-26 11:56:46,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:46,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:46,558 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:46,558 INFO L175 Difference]: Start difference. First operand has 78 places, 137 transitions, 933 flow. Second operand 3 states and 328 transitions. [2023-08-26 11:56:46,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 231 transitions, 2025 flow [2023-08-26 11:56:46,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 231 transitions, 1907 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:56:46,720 INFO L231 Difference]: Finished difference. Result has 80 places, 188 transitions, 1665 flow [2023-08-26 11:56:46,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1665, PETRI_PLACES=80, PETRI_TRANSITIONS=188} [2023-08-26 11:56:46,721 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2023-08-26 11:56:46,721 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 188 transitions, 1665 flow [2023-08-26 11:56:46,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:46,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:46,721 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 11:56:46,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 11:56:46,721 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-08-26 11:56:46,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:46,722 INFO L85 PathProgramCache]: Analyzing trace with hash 210954842, now seen corresponding path program 1 times [2023-08-26 11:56:46,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:46,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491400456] [2023-08-26 11:56:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:46,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 11:56:46,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:46,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491400456] [2023-08-26 11:56:46,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491400456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:46,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:46,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:56:46,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815179111] [2023-08-26 11:56:46,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:46,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:56:46,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:46,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:56:46,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:56:46,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 234 [2023-08-26 11:56:46,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 188 transitions, 1665 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:46,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:46,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 234 [2023-08-26 11:56:46,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:54,912 INFO L124 PetriNetUnfolderBase]: 69212/113249 cut-off events. [2023-08-26 11:56:54,912 INFO L125 PetriNetUnfolderBase]: For 236172/244982 co-relation queries the response was YES. [2023-08-26 11:56:55,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372065 conditions, 113249 events. 69212/113249 cut-off events. For 236172/244982 co-relation queries the response was YES. Maximal size of possible extension queue 5784. Compared 1090763 event pairs, 18076 based on Foata normal form. 9189/98795 useless extension candidates. Maximal degree in co-relation 127435. Up to 63909 conditions per place. [2023-08-26 11:56:55,881 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 195 selfloop transitions, 26 changer transitions 0/247 dead transitions. [2023-08-26 11:56:55,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 247 transitions, 2533 flow [2023-08-26 11:56:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 326 transitions. [2023-08-26 11:56:55,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46438746438746437 [2023-08-26 11:56:55,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 326 transitions. [2023-08-26 11:56:55,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 326 transitions. [2023-08-26 11:56:55,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:55,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 326 transitions. [2023-08-26 11:56:55,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:55,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:55,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:55,885 INFO L175 Difference]: Start difference. First operand has 80 places, 188 transitions, 1665 flow. Second operand 3 states and 326 transitions. [2023-08-26 11:56:55,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 247 transitions, 2533 flow [2023-08-26 11:56:56,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 247 transitions, 2419 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:56:56,127 INFO L231 Difference]: Finished difference. Result has 78 places, 186 transitions, 1599 flow [2023-08-26 11:56:56,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1599, PETRI_PLACES=78, PETRI_TRANSITIONS=186} [2023-08-26 11:56:56,127 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-26 11:56:56,128 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 186 transitions, 1599 flow [2023-08-26 11:56:56,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:56,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:56,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:56:56,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 11:56:56,128 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-08-26 11:56:56,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:56,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1995680269, now seen corresponding path program 1 times [2023-08-26 11:56:56,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:56,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662387082] [2023-08-26 11:56:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:56,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:56:56,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:56,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662387082] [2023-08-26 11:56:56,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662387082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:56,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:56,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:56:56,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126704933] [2023-08-26 11:56:56,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:56,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:56:56,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:56:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:56:56,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 234 [2023-08-26 11:56:56,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 186 transitions, 1599 flow. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:56,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:56,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 234 [2023-08-26 11:56:56,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:57:04,967 INFO L124 PetriNetUnfolderBase]: 74083/120515 cut-off events. [2023-08-26 11:57:04,967 INFO L125 PetriNetUnfolderBase]: For 213103/220565 co-relation queries the response was YES. [2023-08-26 11:57:05,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388118 conditions, 120515 events. 74083/120515 cut-off events. For 213103/220565 co-relation queries the response was YES. Maximal size of possible extension queue 6106. Compared 1160822 event pairs, 19663 based on Foata normal form. 5222/96038 useless extension candidates. Maximal degree in co-relation 381320. Up to 65970 conditions per place. [2023-08-26 11:57:05,681 INFO L140 encePairwiseOnDemand]: 224/234 looper letters, 195 selfloop transitions, 93 changer transitions 0/311 dead transitions. [2023-08-26 11:57:05,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 311 transitions, 2990 flow [2023-08-26 11:57:05,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:57:05,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:57:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 429 transitions. [2023-08-26 11:57:05,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-26 11:57:05,683 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 429 transitions. [2023-08-26 11:57:05,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 429 transitions. [2023-08-26 11:57:05,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:57:05,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 429 transitions. [2023-08-26 11:57:05,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:05,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:05,686 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:05,686 INFO L175 Difference]: Start difference. First operand has 78 places, 186 transitions, 1599 flow. Second operand 4 states and 429 transitions. [2023-08-26 11:57:05,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 311 transitions, 2990 flow [2023-08-26 11:57:05,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 311 transitions, 2910 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:57:05,771 INFO L231 Difference]: Finished difference. Result has 81 places, 227 transitions, 2391 flow [2023-08-26 11:57:05,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2391, PETRI_PLACES=81, PETRI_TRANSITIONS=227} [2023-08-26 11:57:05,771 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2023-08-26 11:57:05,772 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 227 transitions, 2391 flow [2023-08-26 11:57:05,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:05,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:57:05,772 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 11:57:05,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-26 11:57:05,772 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-08-26 11:57:05,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:57:05,773 INFO L85 PathProgramCache]: Analyzing trace with hash 858830796, now seen corresponding path program 1 times [2023-08-26 11:57:05,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:57:05,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672027314] [2023-08-26 11:57:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:57:05,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:57:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:57:05,787 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:57:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:57:05,795 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:57:05,795 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:57:05,795 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (27 of 28 remaining) [2023-08-26 11:57:05,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 28 remaining) [2023-08-26 11:57:05,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 28 remaining) [2023-08-26 11:57:05,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 28 remaining) [2023-08-26 11:57:05,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 28 remaining) [2023-08-26 11:57:05,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (22 of 28 remaining) [2023-08-26 11:57:05,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 28 remaining) [2023-08-26 11:57:05,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 28 remaining) [2023-08-26 11:57:05,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 28 remaining) [2023-08-26 11:57:05,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 28 remaining) [2023-08-26 11:57:05,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 28 remaining) [2023-08-26 11:57:05,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 28 remaining) [2023-08-26 11:57:05,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (15 of 28 remaining) [2023-08-26 11:57:05,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 28 remaining) [2023-08-26 11:57:05,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 28 remaining) [2023-08-26 11:57:05,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 28 remaining) [2023-08-26 11:57:05,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 28 remaining) [2023-08-26 11:57:05,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (10 of 28 remaining) [2023-08-26 11:57:05,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 28 remaining) [2023-08-26 11:57:05,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 28 remaining) [2023-08-26 11:57:05,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 28 remaining) [2023-08-26 11:57:05,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 28 remaining) [2023-08-26 11:57:05,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (5 of 28 remaining) [2023-08-26 11:57:05,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 28 remaining) [2023-08-26 11:57:05,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 28 remaining) [2023-08-26 11:57:05,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 28 remaining) [2023-08-26 11:57:05,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 28 remaining) [2023-08-26 11:57:05,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (0 of 28 remaining) [2023-08-26 11:57:05,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-26 11:57:05,798 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:57:05,799 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:57:05,799 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 11:57:05,833 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:57:05,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 166 transitions, 364 flow [2023-08-26 11:57:05,860 INFO L124 PetriNetUnfolderBase]: 32/356 cut-off events. [2023-08-26 11:57:05,860 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 11:57:05,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 356 events. 32/356 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1301 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 290. Up to 10 conditions per place. [2023-08-26 11:57:05,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 166 transitions, 364 flow [2023-08-26 11:57:05,864 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 166 transitions, 364 flow [2023-08-26 11:57:05,864 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:57:05,864 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 166 transitions, 364 flow [2023-08-26 11:57:05,864 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 166 transitions, 364 flow [2023-08-26 11:57:05,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 166 transitions, 364 flow [2023-08-26 11:57:05,890 INFO L124 PetriNetUnfolderBase]: 32/356 cut-off events. [2023-08-26 11:57:05,890 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 11:57:05,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 356 events. 32/356 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1301 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 290. Up to 10 conditions per place. [2023-08-26 11:57:05,903 INFO L119 LiptonReduction]: Number of co-enabled transitions 17600 [2023-08-26 11:57:07,311 INFO L134 LiptonReduction]: Checked pairs total: 68414 [2023-08-26 11:57:07,311 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-26 11:57:07,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:57:07,313 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;@54afbafe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:57:07,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2023-08-26 11:57:07,313 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:57:07,313 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:57:07,313 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:57:07,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:57:07,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:57:07,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-08-26 11:57:07,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:57:07,314 INFO L85 PathProgramCache]: Analyzing trace with hash 38717, now seen corresponding path program 1 times [2023-08-26 11:57:07,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:57:07,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133297044] [2023-08-26 11:57:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:57:07,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:57:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:57:07,338 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 11:57:07,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:57:07,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133297044] [2023-08-26 11:57:07,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133297044] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:57:07,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:57:07,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:57:07,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156069862] [2023-08-26 11:57:07,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:57:07,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:57:07,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:57:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:57:07,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:57:07,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-08-26 11:57:07,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 98 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:07,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:57:07,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-08-26 11:57:07,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:58:18,807 INFO L124 PetriNetUnfolderBase]: 748783/1013212 cut-off events. [2023-08-26 11:58:18,807 INFO L125 PetriNetUnfolderBase]: For 20237/20237 co-relation queries the response was YES. [2023-08-26 11:58:20,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1965637 conditions, 1013212 events. 748783/1013212 cut-off events. For 20237/20237 co-relation queries the response was YES. Maximal size of possible extension queue 36530. Compared 8689427 event pairs, 612359 based on Foata normal form. 136459/721378 useless extension candidates. Maximal degree in co-relation 155834. Up to 868585 conditions per place. [2023-08-26 11:58:24,819 INFO L140 encePairwiseOnDemand]: 262/273 looper letters, 102 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2023-08-26 11:58:24,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 128 transitions, 496 flow [2023-08-26 11:58:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:58:24,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:58:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-08-26 11:58:24,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018315018315018 [2023-08-26 11:58:24,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-08-26 11:58:24,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-08-26 11:58:24,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:58:24,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-08-26 11:58:24,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:24,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:24,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:24,823 INFO L175 Difference]: Start difference. First operand has 94 places, 98 transitions, 228 flow. Second operand 3 states and 411 transitions. [2023-08-26 11:58:24,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 128 transitions, 496 flow [2023-08-26 11:58:24,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 128 transitions, 484 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-26 11:58:24,840 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 194 flow [2023-08-26 11:58:24,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2023-08-26 11:58:24,841 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -3 predicate places. [2023-08-26 11:58:24,841 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 194 flow [2023-08-26 11:58:24,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:24,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:58:24,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:58:24,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-26 11:58:24,842 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-08-26 11:58:24,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:58:24,842 INFO L85 PathProgramCache]: Analyzing trace with hash 38716, now seen corresponding path program 1 times [2023-08-26 11:58:24,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:58:24,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658437194] [2023-08-26 11:58:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:58:24,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:58:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:58:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:58:24,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:58:24,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658437194] [2023-08-26 11:58:24,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658437194] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:58:24,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:58:24,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:58:24,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927374773] [2023-08-26 11:58:24,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:58:24,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:58:24,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:58:24,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:58:24,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:58:24,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 273 [2023-08-26 11:58:24,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 85 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:58:24,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:58:24,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 273 [2023-08-26 11:58:24,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:59:41,707 INFO L124 PetriNetUnfolderBase]: 811976/1097859 cut-off events. [2023-08-26 11:59:41,708 INFO L125 PetriNetUnfolderBase]: For 9381/9381 co-relation queries the response was YES. [2023-08-26 11:59:44,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2148934 conditions, 1097859 events. 811976/1097859 cut-off events. For 9381/9381 co-relation queries the response was YES. Maximal size of possible extension queue 40847. Compared 9500511 event pairs, 435143 based on Foata normal form. 0/634946 useless extension candidates. Maximal degree in co-relation 1989630. Up to 625878 conditions per place. [2023-08-26 11:59:48,505 INFO L140 encePairwiseOnDemand]: 265/273 looper letters, 111 selfloop transitions, 7 changer transitions 0/142 dead transitions. [2023-08-26 11:59:48,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 142 transitions, 559 flow [2023-08-26 11:59:48,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:59:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:59:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-26 11:59:48,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47863247863247865 [2023-08-26 11:59:48,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-26 11:59:48,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-26 11:59:48,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:59:48,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-26 11:59:48,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:59:48,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:59:48,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:59:48,508 INFO L175 Difference]: Start difference. First operand has 91 places, 85 transitions, 194 flow. Second operand 3 states and 392 transitions. [2023-08-26 11:59:48,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 142 transitions, 559 flow [2023-08-26 12:01:27,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 142 transitions, 555 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:01:27,079 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 244 flow [2023-08-26 12:01:27,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2023-08-26 12:01:27,079 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -1 predicate places. [2023-08-26 12:01:27,079 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 244 flow [2023-08-26 12:01:27,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:01:27,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:01:27,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:01:27,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-26 12:01:27,080 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-08-26 12:01:27,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:01:27,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1201234, now seen corresponding path program 1 times [2023-08-26 12:01:27,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:01:27,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391822199] [2023-08-26 12:01:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:01:27,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:01:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:01:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:01:27,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:01:27,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391822199] [2023-08-26 12:01:27,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391822199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:01:27,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:01:27,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:01:27,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147003887] [2023-08-26 12:01:27,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:01:27,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:01:27,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:01:27,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:01:27,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:01:27,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 273 [2023-08-26 12:01:27,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:01:27,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:01:27,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 273 [2023-08-26 12:01:27,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:03:13,177 INFO L124 PetriNetUnfolderBase]: 877439/1212673 cut-off events. [2023-08-26 12:03:13,178 INFO L125 PetriNetUnfolderBase]: For 190862/192157 co-relation queries the response was YES. [2023-08-26 12:03:16,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2527884 conditions, 1212673 events. 877439/1212673 cut-off events. For 190862/192157 co-relation queries the response was YES. Maximal size of possible extension queue 47412. Compared 11224638 event pairs, 321814 based on Foata normal form. 0/745847 useless extension candidates. Maximal degree in co-relation 946906. Up to 586229 conditions per place. [2023-08-26 12:03:22,287 INFO L140 encePairwiseOnDemand]: 262/273 looper letters, 109 selfloop transitions, 14 changer transitions 0/146 dead transitions. [2023-08-26 12:03:22,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 146 transitions, 626 flow [2023-08-26 12:03:22,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:03:22,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:03:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-08-26 12:03:22,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47374847374847373 [2023-08-26 12:03:22,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-08-26 12:03:22,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-08-26 12:03:22,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:03:22,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-08-26 12:03:22,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:22,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:22,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:22,291 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 244 flow. Second operand 3 states and 388 transitions. [2023-08-26 12:03:22,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 146 transitions, 626 flow [2023-08-26 12:03:57,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 146 transitions, 604 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:03:57,941 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 356 flow [2023-08-26 12:03:57,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2023-08-26 12:03:57,942 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2023-08-26 12:03:57,942 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 356 flow [2023-08-26 12:03:57,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:57,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:03:57,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:03:57,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-26 12:03:57,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-08-26 12:03:57,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:03:57,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1201235, now seen corresponding path program 1 times [2023-08-26 12:03:57,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:03:57,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287418297] [2023-08-26 12:03:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:03:57,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:03:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:03:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:03:57,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:03:57,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287418297] [2023-08-26 12:03:57,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287418297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:03:57,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:03:57,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:03:57,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016460059] [2023-08-26 12:03:57,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:03:57,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:03:57,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:03:57,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:03:57,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:03:57,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-08-26 12:03:57,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:03:57,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:03:57,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-08-26 12:03:57,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:05:39,499 INFO L124 PetriNetUnfolderBase]: 713939/979059 cut-off events. [2023-08-26 12:05:39,499 INFO L125 PetriNetUnfolderBase]: For 314099/315593 co-relation queries the response was YES. [2023-08-26 12:05:42,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272174 conditions, 979059 events. 713939/979059 cut-off events. For 314099/315593 co-relation queries the response was YES. Maximal size of possible extension queue 38489. Compared 8580613 event pairs, 252422 based on Foata normal form. 45272/679391 useless extension candidates. Maximal degree in co-relation 542113. Up to 577739 conditions per place. [2023-08-26 12:05:47,053 INFO L140 encePairwiseOnDemand]: 269/273 looper letters, 117 selfloop transitions, 4 changer transitions 0/144 dead transitions. [2023-08-26 12:05:47,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 144 transitions, 696 flow [2023-08-26 12:05:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:05:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:05:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-26 12:05:47,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2023-08-26 12:05:47,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-26 12:05:47,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-26 12:05:47,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:05:47,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-26 12:05:47,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:05:47,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:05:47,057 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:05:47,057 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 356 flow. Second operand 3 states and 396 transitions. [2023-08-26 12:05:47,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 144 transitions, 696 flow [2023-08-26 12:06:56,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 144 transitions, 668 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:06:56,029 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 332 flow [2023-08-26 12:06:56,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=332, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2023-08-26 12:06:56,030 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -1 predicate places. [2023-08-26 12:06:56,030 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 332 flow [2023-08-26 12:06:56,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:06:56,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:06:56,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:06:56,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-26 12:06:56,030 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-08-26 12:06:56,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:06:56,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1154422545, now seen corresponding path program 1 times [2023-08-26 12:06:56,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:06:56,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989732966] [2023-08-26 12:06:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:06:56,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:06:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:06:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:06:56,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:06:56,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989732966] [2023-08-26 12:06:56,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989732966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:06:56,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:06:56,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:06:56,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077513296] [2023-08-26 12:06:56,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:06:56,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:06:56,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:06:56,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:06:56,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:06:56,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 273 [2023-08-26 12:06:56,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:06:56,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:06:56,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 273 [2023-08-26 12:06:56,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-26 12:07:01,614 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 12:07:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:07:01,763 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 33 remaining) [2023-08-26 12:07:01,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-26 12:07:01,764 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 92/273 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 153321 conditions, 68363 events (51454/68362 cut-off events. For 27426/27506 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 535821 event pairs, 9249 based on Foata normal form. 0/50044 useless extension candidates. Maximal degree in co-relation 150872. Up to 49350 conditions per place.). [2023-08-26 12:07:01,764 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2023-08-26 12:07:01,764 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2023-08-26 12:07:01,764 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2023-08-26 12:07:01,764 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2023-08-26 12:07:01,764 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err4ASSERT_VIOLATIONASSERT (27 of 33 remaining) [2023-08-26 12:07:01,764 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2023-08-26 12:07:01,764 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 33 remaining) [2023-08-26 12:07:01,765 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 33 remaining) [2023-08-26 12:07:01,765 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2023-08-26 12:07:01,765 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2023-08-26 12:07:01,765 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2023-08-26 12:07:01,765 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (20 of 33 remaining) [2023-08-26 12:07:01,765 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (19 of 33 remaining) [2023-08-26 12:07:01,765 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2023-08-26 12:07:01,765 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2023-08-26 12:07:01,765 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2023-08-26 12:07:01,766 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2023-08-26 12:07:01,766 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err4ASSERT_VIOLATIONASSERT (14 of 33 remaining) [2023-08-26 12:07:01,766 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2023-08-26 12:07:01,766 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2023-08-26 12:07:01,766 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2023-08-26 12:07:01,766 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2023-08-26 12:07:01,766 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err4ASSERT_VIOLATIONASSERT (9 of 33 remaining) [2023-08-26 12:07:01,766 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2023-08-26 12:07:01,766 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2023-08-26 12:07:01,766 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2023-08-26 12:07:01,766 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err4ASSERT_VIOLATIONASSERT (5 of 33 remaining) [2023-08-26 12:07:01,767 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2023-08-26 12:07:01,767 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2023-08-26 12:07:01,767 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2023-08-26 12:07:01,767 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2023-08-26 12:07:01,767 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thr1Err4ASSERT_VIOLATIONASSERT (0 of 33 remaining) [2023-08-26 12:07:01,767 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 12:07:01,770 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 4 thread instances [2023-08-26 12:07:01,770 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:07:01,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:07:01 BasicIcfg [2023-08-26 12:07:01,775 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:07:01,775 INFO L158 Benchmark]: Toolchain (without parser) took 699393.67ms. Allocated memory was 339.7MB in the beginning and 16.0GB in the end (delta: 15.7GB). Free memory was 314.4MB in the beginning and 9.5GB in the end (delta: -9.2GB). Peak memory consumption was 7.1GB. Max. memory is 16.0GB. [2023-08-26 12:07:01,776 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 339.7MB. Free memory is still 317.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:07:01,776 INFO L158 Benchmark]: CACSL2BoogieTranslator took 477.21ms. Allocated memory is still 339.7MB. Free memory was 314.4MB in the beginning and 294.8MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 12:07:01,776 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.60ms. Allocated memory is still 339.7MB. Free memory was 294.8MB in the beginning and 292.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:07:01,776 INFO L158 Benchmark]: Boogie Preprocessor took 43.34ms. Allocated memory is still 339.7MB. Free memory was 292.7MB in the beginning and 290.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:07:01,776 INFO L158 Benchmark]: RCFGBuilder took 611.82ms. Allocated memory is still 339.7MB. Free memory was 290.6MB in the beginning and 265.5MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-26 12:07:01,777 INFO L158 Benchmark]: TraceAbstraction took 698193.11ms. Allocated memory was 339.7MB in the beginning and 16.0GB in the end (delta: 15.7GB). Free memory was 264.8MB in the beginning and 9.5GB in the end (delta: -9.3GB). Peak memory consumption was 7.0GB. Max. memory is 16.0GB. [2023-08-26 12:07:01,778 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 339.7MB. Free memory is still 317.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 477.21ms. Allocated memory is still 339.7MB. Free memory was 314.4MB in the beginning and 294.8MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 59.60ms. Allocated memory is still 339.7MB. Free memory was 294.8MB in the beginning and 292.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 43.34ms. Allocated memory is still 339.7MB. Free memory was 292.7MB in the beginning and 290.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 611.82ms. Allocated memory is still 339.7MB. Free memory was 290.6MB in the beginning and 265.5MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 698193.11ms. Allocated memory was 339.7MB in the beginning and 16.0GB in the end (delta: 15.7GB). Free memory was 264.8MB in the beginning and 9.5GB in the end (delta: -9.3GB). Peak memory consumption was 7.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 270]: Unsoundness Warning unspecified type, defaulting to int C: short [270] - GenericResultAtLocation [Line: 270]: Unsoundness Warning unspecified type, defaulting to int C: short [270] - GenericResultAtLocation [Line: 705]: Unsoundness Warning unspecified type, defaulting to int C: volatile unsigned [705] - GenericResultAtLocation [Line: 706]: Unsoundness Warning unspecified type, defaulting to int C: volatile unsigned [706] - GenericResultAtLocation [Line: 707]: Unsoundness Warning unspecified type, defaulting to int C: unsigned [707] - GenericResultAtLocation [Line: 713]: Unsoundness Warning unspecified type, defaulting to int C: unsigned [713] - GenericResultAtLocation [Line: 716]: Unsoundness Warning unspecified type, defaulting to int C: unsigned [716] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.5s, 84 PlacesBefore, 39 PlacesAfterwards, 88 TransitionsBefore, 40 TransitionsAfterwards, 2450 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 3 ChoiceCompositions, 66 TotalNumberOfCompositions, 7035 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2521, independent: 2280, independent conditional: 0, independent unconditional: 2280, dependent: 241, dependent conditional: 0, dependent unconditional: 241, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1283, independent: 1228, independent conditional: 0, independent unconditional: 1228, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2521, independent: 1052, independent conditional: 0, independent unconditional: 1052, dependent: 186, dependent conditional: 0, dependent unconditional: 186, unknown: 1283, unknown conditional: 0, unknown unconditional: 1283] , Statistics on independence cache: Total cache size (in pairs): 139, Positive cache size: 111, Positive conditional cache size: 0, Positive unconditional cache size: 111, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 109 PlacesBefore, 60 PlacesAfterwards, 114 TransitionsBefore, 64 TransitionsAfterwards, 6200 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 51 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 1 ChoiceCompositions, 79 TotalNumberOfCompositions, 23118 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6219, independent: 5795, independent conditional: 0, independent unconditional: 5795, dependent: 424, dependent conditional: 0, dependent unconditional: 424, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2954, independent: 2879, independent conditional: 0, independent unconditional: 2879, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6219, independent: 2916, independent conditional: 0, independent unconditional: 2916, dependent: 349, dependent conditional: 0, dependent unconditional: 349, unknown: 2954, unknown conditional: 0, unknown unconditional: 2954] , Statistics on independence cache: Total cache size (in pairs): 291, Positive cache size: 246, Positive conditional cache size: 0, Positive unconditional cache size: 246, Negative cache size: 45, Negative conditional cache size: 0, Negative unconditional cache size: 45, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 134 PlacesBefore, 78 PlacesAfterwards, 140 TransitionsBefore, 83 TransitionsAfterwards, 11250 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 64 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 1 ChoiceCompositions, 94 TotalNumberOfCompositions, 44444 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9945, independent: 9381, independent conditional: 0, independent unconditional: 9381, dependent: 564, dependent conditional: 0, dependent unconditional: 564, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5180, independent: 5077, independent conditional: 0, independent unconditional: 5077, dependent: 103, dependent conditional: 0, dependent unconditional: 103, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9945, independent: 4304, independent conditional: 0, independent unconditional: 4304, dependent: 461, dependent conditional: 0, dependent unconditional: 461, unknown: 5180, unknown conditional: 0, unknown unconditional: 5180] , Statistics on independence cache: Total cache size (in pairs): 413, Positive cache size: 354, Positive conditional cache size: 0, Positive unconditional cache size: 354, Negative cache size: 59, Negative conditional cache size: 0, Negative unconditional cache size: 59, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 159 PlacesBefore, 94 PlacesAfterwards, 166 TransitionsBefore, 98 TransitionsAfterwards, 17600 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 73 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 19 ConcurrentYvCompositions, 3 ChoiceCompositions, 107 TotalNumberOfCompositions, 68414 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 14630, independent: 13957, independent conditional: 0, independent unconditional: 13957, dependent: 673, dependent conditional: 0, dependent unconditional: 673, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 7985, independent: 7877, independent conditional: 0, independent unconditional: 7877, dependent: 108, dependent conditional: 0, dependent unconditional: 108, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 14630, independent: 6080, independent conditional: 0, independent unconditional: 6080, dependent: 565, dependent conditional: 0, dependent unconditional: 565, unknown: 7985, unknown conditional: 0, unknown unconditional: 7985] , Statistics on independence cache: Total cache size (in pairs): 596, Positive cache size: 528, Positive conditional cache size: 0, Positive unconditional cache size: 528, Negative cache size: 68, Negative conditional cache size: 0, Negative unconditional cache size: 68, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 92/273 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 153321 conditions, 68363 events (51454/68362 cut-off events. For 27426/27506 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 535821 event pairs, 9249 based on Foata normal form. 0/50044 useless extension candidates. Maximal degree in co-relation 150872. Up to 49350 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 92/273 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 153321 conditions, 68363 events (51454/68362 cut-off events. For 27426/27506 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 535821 event pairs, 9249 based on Foata normal form. 0/50044 useless extension candidates. Maximal degree in co-relation 150872. Up to 49350 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 92/273 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 153321 conditions, 68363 events (51454/68362 cut-off events. For 27426/27506 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 535821 event pairs, 9249 based on Foata normal form. 0/50044 useless extension candidates. Maximal degree in co-relation 150872. Up to 49350 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 92/273 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 153321 conditions, 68363 events (51454/68362 cut-off events. For 27426/27506 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 535821 event pairs, 9249 based on Foata normal form. 0/50044 useless extension candidates. Maximal degree in co-relation 150872. Up to 49350 conditions per place.). - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 92/273 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 153321 conditions, 68363 events (51454/68362 cut-off events. For 27426/27506 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 535821 event pairs, 9249 based on Foata normal form. 0/50044 useless extension candidates. Maximal degree in co-relation 150872. Up to 49350 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 92/273 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 153321 conditions, 68363 events (51454/68362 cut-off events. For 27426/27506 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 535821 event pairs, 9249 based on Foata normal form. 0/50044 useless extension candidates. Maximal degree in co-relation 150872. Up to 49350 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 92/273 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 153321 conditions, 68363 events (51454/68362 cut-off events. For 27426/27506 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 535821 event pairs, 9249 based on Foata normal form. 0/50044 useless extension candidates. Maximal degree in co-relation 150872. Up to 49350 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 92/273 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 153321 conditions, 68363 events (51454/68362 cut-off events. For 27426/27506 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 535821 event pairs, 9249 based on Foata normal form. 0/50044 useless extension candidates. Maximal degree in co-relation 150872. Up to 49350 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 92/273 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 153321 conditions, 68363 events (51454/68362 cut-off events. For 27426/27506 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 535821 event pairs, 9249 based on Foata normal form. 0/50044 useless extension candidates. Maximal degree in co-relation 150872. Up to 49350 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 92/273 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 153321 conditions, 68363 events (51454/68362 cut-off events. For 27426/27506 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 535821 event pairs, 9249 based on Foata normal form. 0/50044 useless extension candidates. Maximal degree in co-relation 150872. Up to 49350 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 92/273 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 153321 conditions, 68363 events (51454/68362 cut-off events. For 27426/27506 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 535821 event pairs, 9249 based on Foata normal form. 0/50044 useless extension candidates. Maximal degree in co-relation 150872. Up to 49350 conditions per place.). - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 92/273 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 153321 conditions, 68363 events (51454/68362 cut-off events. For 27426/27506 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 535821 event pairs, 9249 based on Foata normal form. 0/50044 useless extension candidates. Maximal degree in co-relation 150872. Up to 49350 conditions per place.). - TimeoutResultAtElement [Line: 725]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 92/273 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 153321 conditions, 68363 events (51454/68362 cut-off events. For 27426/27506 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 535821 event pairs, 9249 based on Foata normal form. 0/50044 useless extension candidates. Maximal degree in co-relation 150872. Up to 49350 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 105 locations, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.1s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 118 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 118 mSDsluCounter, 11 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 364 IncrementalHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 11 mSDtfsCounter, 364 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=6, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 57 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 128 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.1s, OverallIterations: 10, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 248 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 248 mSDsluCounter, 21 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 752 IncrementalHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 21 mSDtfsCounter, 752 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=596occurred in iteration=9, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 55 NumberOfCodeBlocks, 55 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 85 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 151 locations, 28 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 92.9s, OverallIterations: 13, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 90.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 476 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 476 mSDsluCounter, 35 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 71 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1431 IncrementalHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 71 mSolverCounterUnsat, 35 mSDtfsCounter, 1431 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2391occurred in iteration=12, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 221 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 21/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 174 locations, 33 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 595.9s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 594.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 236 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 236 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 35 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 698 IncrementalHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 35 mSolverCounterUnsat, 14 mSDtfsCounter, 698 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=356occurred in iteration=3, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 38 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown