/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:05:24,654 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:05:24,719 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 20:05:24,729 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:05:24,730 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:05:24,759 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:05:24,760 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:05:24,760 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:05:24,761 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:05:24,764 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:05:24,765 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:05:24,765 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:05:24,765 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:05:24,766 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:05:24,766 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:05:24,766 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:05:24,767 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:05:24,767 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:05:24,767 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:05:24,767 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:05:24,767 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:05:24,768 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:05:24,768 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:05:24,769 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:05:24,769 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:05:24,769 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:05:24,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:05:24,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:05:24,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:05:24,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:05:24,771 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:05:24,771 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:05:24,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:05:24,772 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:05:24,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:05:24,772 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 20:05:25,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:05:25,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:05:25,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:05:25,116 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:05:25,117 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:05:25,118 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-26 20:05:26,265 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:05:26,473 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:05:26,473 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-26 20:05:26,481 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b643915/f28245b9853945b29b00ef4371433217/FLAG60e565f1c [2023-08-26 20:05:26,492 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b643915/f28245b9853945b29b00ef4371433217 [2023-08-26 20:05:26,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:05:26,495 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:05:26,496 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:05:26,496 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:05:26,498 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:05:26,499 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:05:26" (1/1) ... [2023-08-26 20:05:26,499 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@196b9876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:05:26, skipping insertion in model container [2023-08-26 20:05:26,499 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:05:26" (1/1) ... [2023-08-26 20:05:26,518 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:05:26,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:05:26,652 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:05:26,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:05:26,679 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:05:26,679 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:05:26,686 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:05:26,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:05:26 WrapperNode [2023-08-26 20:05:26,686 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:05:26,687 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:05:26,687 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:05:26,687 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:05:26,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:05:26" (1/1) ... [2023-08-26 20:05:26,700 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:05:26" (1/1) ... [2023-08-26 20:05:26,718 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 126 [2023-08-26 20:05:26,719 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:05:26,719 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:05:26,720 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:05:26,720 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:05:26,727 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:05:26" (1/1) ... [2023-08-26 20:05:26,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:05:26" (1/1) ... [2023-08-26 20:05:26,729 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:05:26" (1/1) ... [2023-08-26 20:05:26,730 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:05:26" (1/1) ... [2023-08-26 20:05:26,734 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:05:26" (1/1) ... [2023-08-26 20:05:26,737 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:05:26" (1/1) ... [2023-08-26 20:05:26,738 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:05:26" (1/1) ... [2023-08-26 20:05:26,739 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:05:26" (1/1) ... [2023-08-26 20:05:26,741 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:05:26,742 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:05:26,742 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:05:26,742 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:05:26,743 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:05:26" (1/1) ... [2023-08-26 20:05:26,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:05:26,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:05:26,789 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 20:05:26,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 20:05:26,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:05:26,839 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 20:05:26,839 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 20:05:26,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 20:05:26,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 20:05:26,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 20:05:26,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 20:05:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-26 20:05:26,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-26 20:05:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:05:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:05:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:05:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 20:05:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 20:05:26,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:05:26,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:05:26,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 20:05:26,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:05:26,844 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 20:05:26,960 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:05:26,962 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:05:27,272 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:05:27,343 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:05:27,343 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-26 20:05:27,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:05:27 BoogieIcfgContainer [2023-08-26 20:05:27,345 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:05:27,347 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:05:27,347 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:05:27,354 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:05:27,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:05:26" (1/3) ... [2023-08-26 20:05:27,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449d4e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:05:27, skipping insertion in model container [2023-08-26 20:05:27,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:05:26" (2/3) ... [2023-08-26 20:05:27,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449d4e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:05:27, skipping insertion in model container [2023-08-26 20:05:27,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:05:27" (3/3) ... [2023-08-26 20:05:27,356 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-08-26 20:05:27,373 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:05:27,374 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-26 20:05:27,374 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:05:27,480 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 20:05:27,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 146 transitions, 324 flow [2023-08-26 20:05:27,605 INFO L124 PetriNetUnfolderBase]: 9/142 cut-off events. [2023-08-26 20:05:27,606 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 20:05:27,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 142 events. 9/142 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 171 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-08-26 20:05:27,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 146 transitions, 324 flow [2023-08-26 20:05:27,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 129 transitions, 282 flow [2023-08-26 20:05:27,657 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:05:27,673 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 129 transitions, 282 flow [2023-08-26 20:05:27,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 129 transitions, 282 flow [2023-08-26 20:05:27,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 129 transitions, 282 flow [2023-08-26 20:05:27,721 INFO L124 PetriNetUnfolderBase]: 9/129 cut-off events. [2023-08-26 20:05:27,721 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 20:05:27,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 129 events. 9/129 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 170 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-08-26 20:05:27,725 INFO L119 LiptonReduction]: Number of co-enabled transitions 3608 [2023-08-26 20:05:32,069 INFO L134 LiptonReduction]: Checked pairs total: 3763 [2023-08-26 20:05:32,070 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-26 20:05:32,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:05:32,086 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;@68c88c2a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:05:32,087 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-26 20:05:32,088 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:05:32,088 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 20:05:32,088 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:05:32,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:32,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 20:05:32,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:32,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:32,093 INFO L85 PathProgramCache]: Analyzing trace with hash 578, now seen corresponding path program 1 times [2023-08-26 20:05:32,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:32,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765444139] [2023-08-26 20:05:32,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:32,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:32,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:32,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765444139] [2023-08-26 20:05:32,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765444139] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:32,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:32,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 20:05:32,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839576534] [2023-08-26 20:05:32,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:32,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 20:05:32,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:32,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 20:05:32,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 20:05:32,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 265 [2023-08-26 20:05:32,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 114 flow. Second operand has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 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 20:05:32,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:32,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 265 [2023-08-26 20:05:32,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:32,560 INFO L124 PetriNetUnfolderBase]: 2524/3163 cut-off events. [2023-08-26 20:05:32,560 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-08-26 20:05:32,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6422 conditions, 3163 events. 2524/3163 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11437 event pairs, 1182 based on Foata normal form. 0/1489 useless extension candidates. Maximal degree in co-relation 4966. Up to 3134 conditions per place. [2023-08-26 20:05:32,591 INFO L140 encePairwiseOnDemand]: 263/265 looper letters, 39 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-08-26 20:05:32,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 188 flow [2023-08-26 20:05:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 20:05:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 20:05:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 297 transitions. [2023-08-26 20:05:32,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.560377358490566 [2023-08-26 20:05:32,612 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 297 transitions. [2023-08-26 20:05:32,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 297 transitions. [2023-08-26 20:05:32,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:32,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 297 transitions. [2023-08-26 20:05:32,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 148.5) internal successors, (297), 2 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:32,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:32,628 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:32,629 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 114 flow. Second operand 2 states and 297 transitions. [2023-08-26 20:05:32,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 188 flow [2023-08-26 20:05:32,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-26 20:05:32,638 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2023-08-26 20:05:32,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-08-26 20:05:32,648 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-26 20:05:32,648 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2023-08-26 20:05:32,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 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 20:05:32,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:32,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:05:32,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 20:05:32,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:32,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:32,657 INFO L85 PathProgramCache]: Analyzing trace with hash 570083, now seen corresponding path program 1 times [2023-08-26 20:05:32,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:32,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99401189] [2023-08-26 20:05:32,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:32,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:32,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:32,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99401189] [2023-08-26 20:05:32,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99401189] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:32,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:32,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:05:32,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294788352] [2023-08-26 20:05:32,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:32,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:05:32,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:05:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:05:32,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 265 [2023-08-26 20:05:32,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:32,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:32,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 265 [2023-08-26 20:05:32,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:33,214 INFO L124 PetriNetUnfolderBase]: 2413/3022 cut-off events. [2023-08-26 20:05:33,214 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 20:05:33,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6057 conditions, 3022 events. 2413/3022 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 10827 event pairs, 1127 based on Foata normal form. 0/1434 useless extension candidates. Maximal degree in co-relation 6054. Up to 2992 conditions per place. [2023-08-26 20:05:33,231 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 36 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-26 20:05:33,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 164 flow [2023-08-26 20:05:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:05:33,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:05:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-26 20:05:33,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43018867924528303 [2023-08-26 20:05:33,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-26 20:05:33,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-26 20:05:33,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:33,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-26 20:05:33,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:33,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:33,246 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:33,246 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 342 transitions. [2023-08-26 20:05:33,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 164 flow [2023-08-26 20:05:33,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:05:33,251 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 92 flow [2023-08-26 20:05:33,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-26 20:05:33,251 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-26 20:05:33,252 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 92 flow [2023-08-26 20:05:33,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:33,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:33,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:05:33,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 20:05:33,258 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:33,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash 570085, now seen corresponding path program 1 times [2023-08-26 20:05:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:33,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312478518] [2023-08-26 20:05:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:33,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:33,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:33,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312478518] [2023-08-26 20:05:33,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312478518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:33,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:33,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:05:33,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081264051] [2023-08-26 20:05:33,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:33,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:05:33,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:33,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:05:33,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:05:33,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 265 [2023-08-26 20:05:33,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 92 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 20:05:33,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:33,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 265 [2023-08-26 20:05:33,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:33,611 INFO L124 PetriNetUnfolderBase]: 2302/2881 cut-off events. [2023-08-26 20:05:33,611 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 20:05:33,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5777 conditions, 2881 events. 2302/2881 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10223 event pairs, 1072 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 5773. Up to 2851 conditions per place. [2023-08-26 20:05:33,630 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 34 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-26 20:05:33,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 158 flow [2023-08-26 20:05:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:05:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:05:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-08-26 20:05:33,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125786163522013 [2023-08-26 20:05:33,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-08-26 20:05:33,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-08-26 20:05:33,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:33,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-08-26 20:05:33,634 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 20:05:33,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:33,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:33,636 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 92 flow. Second operand 3 states and 328 transitions. [2023-08-26 20:05:33,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 158 flow [2023-08-26 20:05:33,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:05:33,637 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 89 flow [2023-08-26 20:05:33,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-26 20:05:33,639 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2023-08-26 20:05:33,639 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 89 flow [2023-08-26 20:05:33,639 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 20:05:33,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:33,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:05:33,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 20:05:33,643 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:33,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:33,643 INFO L85 PathProgramCache]: Analyzing trace with hash 547864277, now seen corresponding path program 1 times [2023-08-26 20:05:33,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:33,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679847197] [2023-08-26 20:05:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:33,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:33,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:33,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679847197] [2023-08-26 20:05:33,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679847197] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:33,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:33,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:05:33,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550347906] [2023-08-26 20:05:33,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:33,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:05:33,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:33,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:05:33,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:05:33,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 265 [2023-08-26 20:05:33,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:33,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:33,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 265 [2023-08-26 20:05:33,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:33,999 INFO L124 PetriNetUnfolderBase]: 2256/2817 cut-off events. [2023-08-26 20:05:33,999 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 20:05:34,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5650 conditions, 2817 events. 2256/2817 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9842 event pairs, 1050 based on Foata normal form. 0/1355 useless extension candidates. Maximal degree in co-relation 5646. Up to 2787 conditions per place. [2023-08-26 20:05:34,049 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 32 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-26 20:05:34,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 151 flow [2023-08-26 20:05:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:05:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:05:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-26 20:05:34,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42515723270440253 [2023-08-26 20:05:34,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-26 20:05:34,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-26 20:05:34,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:34,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-26 20:05:34,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,055 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,055 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 89 flow. Second operand 3 states and 338 transitions. [2023-08-26 20:05:34,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 151 flow [2023-08-26 20:05:34,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:05:34,057 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 86 flow [2023-08-26 20:05:34,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-08-26 20:05:34,057 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -11 predicate places. [2023-08-26 20:05:34,058 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 86 flow [2023-08-26 20:05:34,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:34,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:05:34,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 20:05:34,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:34,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:34,059 INFO L85 PathProgramCache]: Analyzing trace with hash 547864276, now seen corresponding path program 1 times [2023-08-26 20:05:34,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:34,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846287355] [2023-08-26 20:05:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:34,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:34,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:34,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846287355] [2023-08-26 20:05:34,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846287355] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:34,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:34,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:05:34,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900726957] [2023-08-26 20:05:34,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:34,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:05:34,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:34,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:05:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:05:34,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 265 [2023-08-26 20:05:34,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:34,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 265 [2023-08-26 20:05:34,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:34,320 INFO L124 PetriNetUnfolderBase]: 2210/2753 cut-off events. [2023-08-26 20:05:34,320 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 20:05:34,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5523 conditions, 2753 events. 2210/2753 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9573 event pairs, 1028 based on Foata normal form. 0/1331 useless extension candidates. Maximal degree in co-relation 5519. Up to 2723 conditions per place. [2023-08-26 20:05:34,339 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 30 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-26 20:05:34,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 144 flow [2023-08-26 20:05:34,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:05:34,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:05:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-08-26 20:05:34,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075471698113208 [2023-08-26 20:05:34,341 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-08-26 20:05:34,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-08-26 20:05:34,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:34,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-08-26 20:05:34,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,345 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,345 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 86 flow. Second operand 3 states and 324 transitions. [2023-08-26 20:05:34,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 144 flow [2023-08-26 20:05:34,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:05:34,346 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 83 flow [2023-08-26 20:05:34,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-08-26 20:05:34,348 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -12 predicate places. [2023-08-26 20:05:34,349 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 83 flow [2023-08-26 20:05:34,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:34,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:34,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 20:05:34,349 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:34,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:34,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1783395390, now seen corresponding path program 1 times [2023-08-26 20:05:34,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:34,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447134494] [2023-08-26 20:05:34,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:34,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:34,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:34,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447134494] [2023-08-26 20:05:34,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447134494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:34,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:34,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:05:34,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001014104] [2023-08-26 20:05:34,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:34,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:05:34,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:34,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:05:34,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:05:34,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 265 [2023-08-26 20:05:34,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:34,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 265 [2023-08-26 20:05:34,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:34,596 INFO L124 PetriNetUnfolderBase]: 2107/2620 cut-off events. [2023-08-26 20:05:34,597 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 20:05:34,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5258 conditions, 2620 events. 2107/2620 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 8988 event pairs, 981 based on Foata normal form. 0/1284 useless extension candidates. Maximal degree in co-relation 5254. Up to 2590 conditions per place. [2023-08-26 20:05:34,612 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 28 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-26 20:05:34,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 137 flow [2023-08-26 20:05:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:05:34,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:05:34,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-08-26 20:05:34,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42012578616352203 [2023-08-26 20:05:34,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-08-26 20:05:34,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-08-26 20:05:34,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:34,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-08-26 20:05:34,615 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 20:05:34,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,617 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 83 flow. Second operand 3 states and 334 transitions. [2023-08-26 20:05:34,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 137 flow [2023-08-26 20:05:34,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:05:34,618 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 80 flow [2023-08-26 20:05:34,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-08-26 20:05:34,619 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -13 predicate places. [2023-08-26 20:05:34,619 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 80 flow [2023-08-26 20:05:34,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:34,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:34,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 20:05:34,620 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:34,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:34,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1783395392, now seen corresponding path program 1 times [2023-08-26 20:05:34,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:34,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262189677] [2023-08-26 20:05:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:34,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:34,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:34,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262189677] [2023-08-26 20:05:34,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262189677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:34,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:34,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:05:34,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010586695] [2023-08-26 20:05:34,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:34,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:05:34,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:34,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:05:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:05:34,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 265 [2023-08-26 20:05:34,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:34,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 265 [2023-08-26 20:05:34,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:34,813 INFO L124 PetriNetUnfolderBase]: 2004/2487 cut-off events. [2023-08-26 20:05:34,813 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 20:05:34,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4993 conditions, 2487 events. 2004/2487 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 8442 event pairs, 934 based on Foata normal form. 0/1237 useless extension candidates. Maximal degree in co-relation 4989. Up to 2457 conditions per place. [2023-08-26 20:05:34,827 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 26 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-26 20:05:34,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 31 transitions, 130 flow [2023-08-26 20:05:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:05:34,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:05:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-26 20:05:34,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025157232704403 [2023-08-26 20:05:34,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-26 20:05:34,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-26 20:05:34,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:34,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-26 20:05:34,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,832 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 80 flow. Second operand 3 states and 320 transitions. [2023-08-26 20:05:34,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 31 transitions, 130 flow [2023-08-26 20:05:34,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 31 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:05:34,833 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 77 flow [2023-08-26 20:05:34,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-08-26 20:05:34,834 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -14 predicate places. [2023-08-26 20:05:34,834 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 77 flow [2023-08-26 20:05:34,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:34,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:34,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:34,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 20:05:34,835 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:34,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:34,835 INFO L85 PathProgramCache]: Analyzing trace with hash -151006053, now seen corresponding path program 1 times [2023-08-26 20:05:34,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:34,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144303618] [2023-08-26 20:05:34,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:34,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:35,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:35,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144303618] [2023-08-26 20:05:35,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144303618] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:35,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:35,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:05:35,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385170928] [2023-08-26 20:05:35,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:35,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:05:35,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:35,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:05:35,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:05:35,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 265 [2023-08-26 20:05:35,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:35,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:35,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 265 [2023-08-26 20:05:35,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:35,172 INFO L124 PetriNetUnfolderBase]: 1590/1992 cut-off events. [2023-08-26 20:05:35,172 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 20:05:35,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 1992 events. 1590/1992 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6638 event pairs, 736 based on Foata normal form. 0/1039 useless extension candidates. Maximal degree in co-relation 4000. Up to 1962 conditions per place. [2023-08-26 20:05:35,183 INFO L140 encePairwiseOnDemand]: 263/265 looper letters, 25 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-26 20:05:35,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 127 flow [2023-08-26 20:05:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:05:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:05:35,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2023-08-26 20:05:35,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3849056603773585 [2023-08-26 20:05:35,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2023-08-26 20:05:35,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2023-08-26 20:05:35,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:35,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2023-08-26 20:05:35,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:35,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:35,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:35,188 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 77 flow. Second operand 3 states and 306 transitions. [2023-08-26 20:05:35,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 127 flow [2023-08-26 20:05:35,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:05:35,189 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 76 flow [2023-08-26 20:05:35,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-26 20:05:35,189 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -14 predicate places. [2023-08-26 20:05:35,189 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 76 flow [2023-08-26 20:05:35,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:35,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:35,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:35,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 20:05:35,190 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:35,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:35,191 INFO L85 PathProgramCache]: Analyzing trace with hash -151006054, now seen corresponding path program 1 times [2023-08-26 20:05:35,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:35,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965139313] [2023-08-26 20:05:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:35,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:35,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:35,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965139313] [2023-08-26 20:05:35,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965139313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:35,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:35,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:05:35,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212152091] [2023-08-26 20:05:35,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:35,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 20:05:35,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:35,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 20:05:35,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-26 20:05:35,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 265 [2023-08-26 20:05:35,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:35,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:35,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 265 [2023-08-26 20:05:35,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:35,412 INFO L124 PetriNetUnfolderBase]: 1176/1497 cut-off events. [2023-08-26 20:05:35,412 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 20:05:35,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3015 conditions, 1497 events. 1176/1497 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4879 event pairs, 538 based on Foata normal form. 0/841 useless extension candidates. Maximal degree in co-relation 3011. Up to 1467 conditions per place. [2023-08-26 20:05:35,422 INFO L140 encePairwiseOnDemand]: 263/265 looper letters, 24 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-26 20:05:35,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 124 flow [2023-08-26 20:05:35,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:05:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:05:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-08-26 20:05:35,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36477987421383645 [2023-08-26 20:05:35,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-08-26 20:05:35,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-08-26 20:05:35,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:35,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-08-26 20:05:35,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:35,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:35,427 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:35,427 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 76 flow. Second operand 3 states and 290 transitions. [2023-08-26 20:05:35,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 124 flow [2023-08-26 20:05:35,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:05:35,429 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 75 flow [2023-08-26 20:05:35,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-26 20:05:35,429 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -14 predicate places. [2023-08-26 20:05:35,430 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 75 flow [2023-08-26 20:05:35,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:35,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:35,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:35,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 20:05:35,430 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:35,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:35,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2108249569, now seen corresponding path program 1 times [2023-08-26 20:05:35,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:35,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430089243] [2023-08-26 20:05:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:35,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:35,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:35,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430089243] [2023-08-26 20:05:35,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430089243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:35,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:35,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:05:35,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685060346] [2023-08-26 20:05:35,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:35,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:05:35,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:35,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:05:35,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:05:35,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 265 [2023-08-26 20:05:35,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 75 flow. Second operand has 3 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 20:05:35,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:35,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 265 [2023-08-26 20:05:35,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:35,728 INFO L124 PetriNetUnfolderBase]: 1537/1954 cut-off events. [2023-08-26 20:05:35,729 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-08-26 20:05:35,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3956 conditions, 1954 events. 1537/1954 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6391 event pairs, 141 based on Foata normal form. 1/1126 useless extension candidates. Maximal degree in co-relation 3952. Up to 1733 conditions per place. [2023-08-26 20:05:35,740 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 41 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-08-26 20:05:35,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 220 flow [2023-08-26 20:05:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:05:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:05:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-08-26 20:05:35,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5320754716981132 [2023-08-26 20:05:35,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-08-26 20:05:35,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-08-26 20:05:35,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:35,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-08-26 20:05:35,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:35,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:35,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:35,745 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 75 flow. Second operand 3 states and 423 transitions. [2023-08-26 20:05:35,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 220 flow [2023-08-26 20:05:35,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:05:35,748 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 107 flow [2023-08-26 20:05:35,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-26 20:05:35,749 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -12 predicate places. [2023-08-26 20:05:35,749 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 107 flow [2023-08-26 20:05:35,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 20:05:35,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:35,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:35,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 20:05:35,750 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:35,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:35,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2088145847, now seen corresponding path program 1 times [2023-08-26 20:05:35,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:35,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170887129] [2023-08-26 20:05:35,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:35,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:35,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:35,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170887129] [2023-08-26 20:05:35,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170887129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:35,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:35,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:05:35,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806213958] [2023-08-26 20:05:35,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:35,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:05:35,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:05:35,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:05:35,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:35,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:35,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:35,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:35,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:36,154 INFO L124 PetriNetUnfolderBase]: 2491/3264 cut-off events. [2023-08-26 20:05:36,154 INFO L125 PetriNetUnfolderBase]: For 928/933 co-relation queries the response was YES. [2023-08-26 20:05:36,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7998 conditions, 3264 events. 2491/3264 cut-off events. For 928/933 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 13537 event pairs, 471 based on Foata normal form. 67/3270 useless extension candidates. Maximal degree in co-relation 7993. Up to 1502 conditions per place. [2023-08-26 20:05:36,173 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 83 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2023-08-26 20:05:36,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 91 transitions, 458 flow [2023-08-26 20:05:36,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:05:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:05:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 648 transitions. [2023-08-26 20:05:36,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4890566037735849 [2023-08-26 20:05:36,176 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 648 transitions. [2023-08-26 20:05:36,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 648 transitions. [2023-08-26 20:05:36,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:36,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 648 transitions. [2023-08-26 20:05:36,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:36,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:36,180 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:36,180 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 107 flow. Second operand 5 states and 648 transitions. [2023-08-26 20:05:36,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 91 transitions, 458 flow [2023-08-26 20:05:36,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 91 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:05:36,183 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 145 flow [2023-08-26 20:05:36,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2023-08-26 20:05:36,184 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2023-08-26 20:05:36,184 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 145 flow [2023-08-26 20:05:36,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:36,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:36,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:36,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 20:05:36,184 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:36,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:36,185 INFO L85 PathProgramCache]: Analyzing trace with hash -38187658, now seen corresponding path program 1 times [2023-08-26 20:05:36,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:36,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122841034] [2023-08-26 20:05:36,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:36,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:36,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:36,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122841034] [2023-08-26 20:05:36,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122841034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:05:36,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305756816] [2023-08-26 20:05:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:36,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:05:36,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:05:36,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:05:36,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 20:05:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:36,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 20:05:36,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:05:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:36,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:05:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:36,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305756816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:05:36,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:05:36,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-26 20:05:36,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844446280] [2023-08-26 20:05:36,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:05:36,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 20:05:36,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:36,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 20:05:36,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 20:05:36,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:36,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 145 flow. Second operand has 8 states, 8 states have (on average 117.75) internal successors, (942), 8 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:36,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:36,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:36,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:36,910 INFO L124 PetriNetUnfolderBase]: 3380/4453 cut-off events. [2023-08-26 20:05:36,910 INFO L125 PetriNetUnfolderBase]: For 4150/4682 co-relation queries the response was YES. [2023-08-26 20:05:36,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12945 conditions, 4453 events. 3380/4453 cut-off events. For 4150/4682 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 19844 event pairs, 775 based on Foata normal form. 620/5016 useless extension candidates. Maximal degree in co-relation 12937. Up to 1664 conditions per place. [2023-08-26 20:05:36,942 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 114 selfloop transitions, 10 changer transitions 0/127 dead transitions. [2023-08-26 20:05:36,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 127 transitions, 741 flow [2023-08-26 20:05:36,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:05:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:05:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 899 transitions. [2023-08-26 20:05:36,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48463611859838274 [2023-08-26 20:05:36,945 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 899 transitions. [2023-08-26 20:05:36,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 899 transitions. [2023-08-26 20:05:36,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:36,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 899 transitions. [2023-08-26 20:05:36,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:36,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:36,951 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:36,951 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 145 flow. Second operand 7 states and 899 transitions. [2023-08-26 20:05:36,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 127 transitions, 741 flow [2023-08-26 20:05:36,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 127 transitions, 716 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-26 20:05:36,957 INFO L231 Difference]: Finished difference. Result has 58 places, 44 transitions, 210 flow [2023-08-26 20:05:36,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=210, PETRI_PLACES=58, PETRI_TRANSITIONS=44} [2023-08-26 20:05:36,958 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2023-08-26 20:05:36,958 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 44 transitions, 210 flow [2023-08-26 20:05:36,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 117.75) internal successors, (942), 8 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:36,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:36,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:36,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 20:05:37,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-26 20:05:37,165 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:37,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:37,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1849307510, now seen corresponding path program 1 times [2023-08-26 20:05:37,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:37,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297958858] [2023-08-26 20:05:37,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:37,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:37,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:37,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297958858] [2023-08-26 20:05:37,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297958858] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:05:37,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672902291] [2023-08-26 20:05:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:37,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:05:37,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:05:37,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:05:37,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 20:05:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:37,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 20:05:37,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:05:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:37,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:05:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:37,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672902291] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:05:37,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:05:37,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-26 20:05:37,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936463774] [2023-08-26 20:05:37,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:05:37,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 20:05:37,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:37,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 20:05:37,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 20:05:37,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:37,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 44 transitions, 210 flow. Second operand has 8 states, 8 states have (on average 117.75) internal successors, (942), 8 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:37,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:37,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:37,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:37,920 INFO L124 PetriNetUnfolderBase]: 3487/4661 cut-off events. [2023-08-26 20:05:37,921 INFO L125 PetriNetUnfolderBase]: For 9496/9796 co-relation queries the response was YES. [2023-08-26 20:05:37,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16892 conditions, 4661 events. 3487/4661 cut-off events. For 9496/9796 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 20884 event pairs, 829 based on Foata normal form. 408/4951 useless extension candidates. Maximal degree in co-relation 16879. Up to 1949 conditions per place. [2023-08-26 20:05:37,958 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 130 selfloop transitions, 10 changer transitions 0/144 dead transitions. [2023-08-26 20:05:37,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 144 transitions, 974 flow [2023-08-26 20:05:37,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:05:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:05:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 901 transitions. [2023-08-26 20:05:37,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-08-26 20:05:37,961 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 901 transitions. [2023-08-26 20:05:37,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 901 transitions. [2023-08-26 20:05:37,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:37,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 901 transitions. [2023-08-26 20:05:37,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.71428571428572) internal successors, (901), 7 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:37,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:37,967 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:37,967 INFO L175 Difference]: Start difference. First operand has 58 places, 44 transitions, 210 flow. Second operand 7 states and 901 transitions. [2023-08-26 20:05:37,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 144 transitions, 974 flow [2023-08-26 20:05:38,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 144 transitions, 927 flow, removed 20 selfloop flow, removed 1 redundant places. [2023-08-26 20:05:38,014 INFO L231 Difference]: Finished difference. Result has 67 places, 49 transitions, 270 flow [2023-08-26 20:05:38,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=270, PETRI_PLACES=67, PETRI_TRANSITIONS=49} [2023-08-26 20:05:38,015 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2023-08-26 20:05:38,015 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 270 flow [2023-08-26 20:05:38,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 117.75) internal successors, (942), 8 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:38,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:38,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:38,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 20:05:38,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-26 20:05:38,222 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:38,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:38,222 INFO L85 PathProgramCache]: Analyzing trace with hash 861264108, now seen corresponding path program 2 times [2023-08-26 20:05:38,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:38,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170769801] [2023-08-26 20:05:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:38,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:38,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:38,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170769801] [2023-08-26 20:05:38,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170769801] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:38,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:38,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:05:38,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398111280] [2023-08-26 20:05:38,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:38,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:05:38,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:38,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:05:38,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:05:38,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:38,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 49 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:38,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:38,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:38,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:38,936 INFO L124 PetriNetUnfolderBase]: 5023/6699 cut-off events. [2023-08-26 20:05:38,936 INFO L125 PetriNetUnfolderBase]: For 21127/21676 co-relation queries the response was YES. [2023-08-26 20:05:38,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26807 conditions, 6699 events. 5023/6699 cut-off events. For 21127/21676 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 31471 event pairs, 1277 based on Foata normal form. 584/7145 useless extension candidates. Maximal degree in co-relation 26790. Up to 3534 conditions per place. [2023-08-26 20:05:38,993 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 102 selfloop transitions, 12 changer transitions 0/118 dead transitions. [2023-08-26 20:05:38,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 118 transitions, 853 flow [2023-08-26 20:05:38,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:05:38,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:05:38,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 640 transitions. [2023-08-26 20:05:38,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830188679245283 [2023-08-26 20:05:38,995 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 640 transitions. [2023-08-26 20:05:38,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 640 transitions. [2023-08-26 20:05:38,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:38,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 640 transitions. [2023-08-26 20:05:38,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:39,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:39,001 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:39,001 INFO L175 Difference]: Start difference. First operand has 67 places, 49 transitions, 270 flow. Second operand 5 states and 640 transitions. [2023-08-26 20:05:39,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 118 transitions, 853 flow [2023-08-26 20:05:39,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 118 transitions, 821 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-26 20:05:39,077 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 332 flow [2023-08-26 20:05:39,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2023-08-26 20:05:39,078 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2023-08-26 20:05:39,078 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 332 flow [2023-08-26 20:05:39,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:39,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:39,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:39,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 20:05:39,079 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:39,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:39,080 INFO L85 PathProgramCache]: Analyzing trace with hash -888955976, now seen corresponding path program 2 times [2023-08-26 20:05:39,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:39,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597809975] [2023-08-26 20:05:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:39,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:39,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:39,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597809975] [2023-08-26 20:05:39,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597809975] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:05:39,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814437884] [2023-08-26 20:05:39,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 20:05:39,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:05:39,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:05:39,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:05:39,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 20:05:39,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:05:39,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:05:39,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 20:05:39,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:05:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:39,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:05:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:39,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814437884] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:05:39,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:05:39,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 20:05:39,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651328546] [2023-08-26 20:05:39,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:05:39,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 20:05:39,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:39,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 20:05:39,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-26 20:05:39,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:39,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 332 flow. Second operand has 10 states, 10 states have (on average 117.5) internal successors, (1175), 10 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:39,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:39,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:39,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:40,309 INFO L124 PetriNetUnfolderBase]: 6451/8542 cut-off events. [2023-08-26 20:05:40,310 INFO L125 PetriNetUnfolderBase]: For 42843/44373 co-relation queries the response was YES. [2023-08-26 20:05:40,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37426 conditions, 8542 events. 6451/8542 cut-off events. For 42843/44373 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 40374 event pairs, 1716 based on Foata normal form. 1688/10017 useless extension candidates. Maximal degree in co-relation 37406. Up to 4314 conditions per place. [2023-08-26 20:05:40,389 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 194 selfloop transitions, 22 changer transitions 0/222 dead transitions. [2023-08-26 20:05:40,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 222 transitions, 2008 flow [2023-08-26 20:05:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 20:05:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 20:05:40,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1264 transitions. [2023-08-26 20:05:40,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4769811320754717 [2023-08-26 20:05:40,393 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1264 transitions. [2023-08-26 20:05:40,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1264 transitions. [2023-08-26 20:05:40,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:40,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1264 transitions. [2023-08-26 20:05:40,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 126.4) internal successors, (1264), 10 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:40,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 265.0) internal successors, (2915), 11 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:40,400 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 265.0) internal successors, (2915), 11 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:40,400 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 332 flow. Second operand 10 states and 1264 transitions. [2023-08-26 20:05:40,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 222 transitions, 2008 flow [2023-08-26 20:05:40,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 222 transitions, 1842 flow, removed 66 selfloop flow, removed 1 redundant places. [2023-08-26 20:05:40,502 INFO L231 Difference]: Finished difference. Result has 86 places, 67 transitions, 485 flow [2023-08-26 20:05:40,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=485, PETRI_PLACES=86, PETRI_TRANSITIONS=67} [2023-08-26 20:05:40,503 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2023-08-26 20:05:40,503 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 67 transitions, 485 flow [2023-08-26 20:05:40,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 117.5) internal successors, (1175), 10 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:40,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:40,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:40,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 20:05:40,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:05:40,709 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:40,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:40,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1250683940, now seen corresponding path program 3 times [2023-08-26 20:05:40,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:40,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105532480] [2023-08-26 20:05:40,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:40,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:40,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:40,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105532480] [2023-08-26 20:05:40,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105532480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:05:40,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818174557] [2023-08-26 20:05:40,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 20:05:40,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:05:40,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:05:40,798 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:05:40,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 20:05:40,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 20:05:40,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:05:40,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 20:05:40,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:05:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:40,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:05:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:40,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818174557] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:05:40,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:05:40,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 20:05:40,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494515986] [2023-08-26 20:05:40,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:05:40,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 20:05:40,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:40,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 20:05:40,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-26 20:05:40,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:40,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 67 transitions, 485 flow. Second operand has 10 states, 10 states have (on average 117.7) internal successors, (1177), 10 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:40,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:40,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:40,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:42,211 INFO L124 PetriNetUnfolderBase]: 8995/11662 cut-off events. [2023-08-26 20:05:42,211 INFO L125 PetriNetUnfolderBase]: For 72036/74546 co-relation queries the response was YES. [2023-08-26 20:05:42,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58227 conditions, 11662 events. 8995/11662 cut-off events. For 72036/74546 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 55095 event pairs, 2056 based on Foata normal form. 785/12096 useless extension candidates. Maximal degree in co-relation 58201. Up to 7124 conditions per place. [2023-08-26 20:05:42,309 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 269 selfloop transitions, 24 changer transitions 0/298 dead transitions. [2023-08-26 20:05:42,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 298 transitions, 2933 flow [2023-08-26 20:05:42,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 20:05:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 20:05:42,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1264 transitions. [2023-08-26 20:05:42,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4769811320754717 [2023-08-26 20:05:42,313 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1264 transitions. [2023-08-26 20:05:42,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1264 transitions. [2023-08-26 20:05:42,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:42,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1264 transitions. [2023-08-26 20:05:42,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 126.4) internal successors, (1264), 10 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:42,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 265.0) internal successors, (2915), 11 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:42,322 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 265.0) internal successors, (2915), 11 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:42,322 INFO L175 Difference]: Start difference. First operand has 86 places, 67 transitions, 485 flow. Second operand 10 states and 1264 transitions. [2023-08-26 20:05:42,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 298 transitions, 2933 flow [2023-08-26 20:05:42,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 298 transitions, 2501 flow, removed 119 selfloop flow, removed 4 redundant places. [2023-08-26 20:05:42,658 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 642 flow [2023-08-26 20:05:42,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=642, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2023-08-26 20:05:42,659 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2023-08-26 20:05:42,659 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 642 flow [2023-08-26 20:05:42,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 117.7) internal successors, (1177), 10 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:42,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:42,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:42,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 20:05:42,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 20:05:42,865 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:42,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:42,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1217116808, now seen corresponding path program 4 times [2023-08-26 20:05:42,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:42,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495180402] [2023-08-26 20:05:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:42,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:42,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:42,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495180402] [2023-08-26 20:05:42,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495180402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:05:42,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062009020] [2023-08-26 20:05:42,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 20:05:42,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:05:42,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:05:42,992 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:05:43,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 20:05:43,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 20:05:43,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:05:43,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 20:05:43,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:05:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:43,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:05:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:43,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062009020] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:05:43,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:05:43,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 20:05:43,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433322533] [2023-08-26 20:05:43,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:05:43,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 20:05:43,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:43,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 20:05:43,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-26 20:05:43,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:43,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 81 transitions, 642 flow. Second operand has 10 states, 10 states have (on average 117.8) internal successors, (1178), 10 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:43,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:43,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:43,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:44,599 INFO L124 PetriNetUnfolderBase]: 8756/11434 cut-off events. [2023-08-26 20:05:44,599 INFO L125 PetriNetUnfolderBase]: For 80006/81460 co-relation queries the response was YES. [2023-08-26 20:05:44,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58208 conditions, 11434 events. 8756/11434 cut-off events. For 80006/81460 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 54536 event pairs, 1811 based on Foata normal form. 759/11849 useless extension candidates. Maximal degree in co-relation 58176. Up to 7453 conditions per place. [2023-08-26 20:05:44,751 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 166 selfloop transitions, 28 changer transitions 0/199 dead transitions. [2023-08-26 20:05:44,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 199 transitions, 1836 flow [2023-08-26 20:05:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:05:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:05:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 762 transitions. [2023-08-26 20:05:44,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2023-08-26 20:05:44,755 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 762 transitions. [2023-08-26 20:05:44,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 762 transitions. [2023-08-26 20:05:44,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:44,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 762 transitions. [2023-08-26 20:05:44,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.0) internal successors, (762), 6 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:44,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 265.0) internal successors, (1855), 7 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:44,763 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 265.0) internal successors, (1855), 7 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:44,763 INFO L175 Difference]: Start difference. First operand has 97 places, 81 transitions, 642 flow. Second operand 6 states and 762 transitions. [2023-08-26 20:05:44,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 199 transitions, 1836 flow [2023-08-26 20:05:44,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 199 transitions, 1750 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-26 20:05:44,985 INFO L231 Difference]: Finished difference. Result has 101 places, 91 transitions, 779 flow [2023-08-26 20:05:44,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=779, PETRI_PLACES=101, PETRI_TRANSITIONS=91} [2023-08-26 20:05:44,986 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 47 predicate places. [2023-08-26 20:05:44,986 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 91 transitions, 779 flow [2023-08-26 20:05:44,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 117.8) internal successors, (1178), 10 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:44,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:44,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:44,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 20:05:45,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-26 20:05:45,192 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:45,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:45,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1711543786, now seen corresponding path program 5 times [2023-08-26 20:05:45,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:45,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472065594] [2023-08-26 20:05:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:45,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:45,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:45,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472065594] [2023-08-26 20:05:45,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472065594] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:45,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:45,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:05:45,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481171309] [2023-08-26 20:05:45,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:45,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:05:45,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:45,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:05:45,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:05:45,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:45,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 91 transitions, 779 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:45,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:45,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:45,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:46,350 INFO L124 PetriNetUnfolderBase]: 9005/11722 cut-off events. [2023-08-26 20:05:46,351 INFO L125 PetriNetUnfolderBase]: For 81408/83122 co-relation queries the response was YES. [2023-08-26 20:05:46,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61042 conditions, 11722 events. 9005/11722 cut-off events. For 81408/83122 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 56072 event pairs, 2815 based on Foata normal form. 720/12110 useless extension candidates. Maximal degree in co-relation 61007. Up to 9874 conditions per place. [2023-08-26 20:05:46,428 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 152 selfloop transitions, 18 changer transitions 0/175 dead transitions. [2023-08-26 20:05:46,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 175 transitions, 1656 flow [2023-08-26 20:05:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:05:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:05:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 633 transitions. [2023-08-26 20:05:46,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47773584905660377 [2023-08-26 20:05:46,431 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 633 transitions. [2023-08-26 20:05:46,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 633 transitions. [2023-08-26 20:05:46,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:46,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 633 transitions. [2023-08-26 20:05:46,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:46,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:46,436 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:46,436 INFO L175 Difference]: Start difference. First operand has 101 places, 91 transitions, 779 flow. Second operand 5 states and 633 transitions. [2023-08-26 20:05:46,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 175 transitions, 1656 flow [2023-08-26 20:05:46,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 175 transitions, 1550 flow, removed 30 selfloop flow, removed 2 redundant places. [2023-08-26 20:05:46,762 INFO L231 Difference]: Finished difference. Result has 103 places, 92 transitions, 720 flow [2023-08-26 20:05:46,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=720, PETRI_PLACES=103, PETRI_TRANSITIONS=92} [2023-08-26 20:05:46,763 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2023-08-26 20:05:46,763 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 92 transitions, 720 flow [2023-08-26 20:05:46,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:46,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:46,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:46,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 20:05:46,764 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:46,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:46,764 INFO L85 PathProgramCache]: Analyzing trace with hash -955109672, now seen corresponding path program 3 times [2023-08-26 20:05:46,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:46,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703823741] [2023-08-26 20:05:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:46,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:46,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:46,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703823741] [2023-08-26 20:05:46,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703823741] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:46,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:46,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:05:46,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053091932] [2023-08-26 20:05:46,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:46,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:05:46,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:46,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:05:46,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:05:46,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:46,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 92 transitions, 720 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:46,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:46,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:46,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:47,886 INFO L124 PetriNetUnfolderBase]: 8399/11102 cut-off events. [2023-08-26 20:05:47,886 INFO L125 PetriNetUnfolderBase]: For 75501/79567 co-relation queries the response was YES. [2023-08-26 20:05:47,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54858 conditions, 11102 events. 8399/11102 cut-off events. For 75501/79567 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 52717 event pairs, 2344 based on Foata normal form. 1505/12523 useless extension candidates. Maximal degree in co-relation 54823. Up to 8986 conditions per place. [2023-08-26 20:05:48,068 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 188 selfloop transitions, 12 changer transitions 5/213 dead transitions. [2023-08-26 20:05:48,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 213 transitions, 2220 flow [2023-08-26 20:05:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:05:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:05:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 633 transitions. [2023-08-26 20:05:48,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47773584905660377 [2023-08-26 20:05:48,070 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 633 transitions. [2023-08-26 20:05:48,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 633 transitions. [2023-08-26 20:05:48,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:48,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 633 transitions. [2023-08-26 20:05:48,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:48,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:48,075 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:48,075 INFO L175 Difference]: Start difference. First operand has 103 places, 92 transitions, 720 flow. Second operand 5 states and 633 transitions. [2023-08-26 20:05:48,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 213 transitions, 2220 flow [2023-08-26 20:05:48,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 213 transitions, 2096 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-26 20:05:48,267 INFO L231 Difference]: Finished difference. Result has 104 places, 93 transitions, 709 flow [2023-08-26 20:05:48,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=709, PETRI_PLACES=104, PETRI_TRANSITIONS=93} [2023-08-26 20:05:48,268 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2023-08-26 20:05:48,268 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 93 transitions, 709 flow [2023-08-26 20:05:48,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:48,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:48,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:48,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 20:05:48,269 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:48,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1440158920, now seen corresponding path program 4 times [2023-08-26 20:05:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:48,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362109051] [2023-08-26 20:05:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:48,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:48,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:48,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362109051] [2023-08-26 20:05:48,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362109051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:05:48,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927468626] [2023-08-26 20:05:48,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 20:05:48,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:05:48,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:05:48,347 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:05:48,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 20:05:48,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 20:05:48,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:05:48,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 20:05:48,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:05:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:48,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:05:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:48,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927468626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:05:48,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:05:48,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 20:05:48,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454463478] [2023-08-26 20:05:48,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:05:48,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 20:05:48,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:48,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 20:05:48,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-26 20:05:48,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:48,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 93 transitions, 709 flow. Second operand has 10 states, 10 states have (on average 117.5) internal successors, (1175), 10 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:48,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:48,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:48,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:49,729 INFO L124 PetriNetUnfolderBase]: 9861/12958 cut-off events. [2023-08-26 20:05:49,730 INFO L125 PetriNetUnfolderBase]: For 90030/94369 co-relation queries the response was YES. [2023-08-26 20:05:49,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65448 conditions, 12958 events. 9861/12958 cut-off events. For 90030/94369 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 62600 event pairs, 2635 based on Foata normal form. 1879/14756 useless extension candidates. Maximal degree in co-relation 65413. Up to 8770 conditions per place. [2023-08-26 20:05:49,814 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 228 selfloop transitions, 26 changer transitions 0/262 dead transitions. [2023-08-26 20:05:49,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 262 transitions, 2633 flow [2023-08-26 20:05:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:05:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:05:49,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 762 transitions. [2023-08-26 20:05:49,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2023-08-26 20:05:49,816 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 762 transitions. [2023-08-26 20:05:49,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 762 transitions. [2023-08-26 20:05:49,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:49,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 762 transitions. [2023-08-26 20:05:49,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.0) internal successors, (762), 6 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:49,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 265.0) internal successors, (1855), 7 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:49,821 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 265.0) internal successors, (1855), 7 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:49,821 INFO L175 Difference]: Start difference. First operand has 104 places, 93 transitions, 709 flow. Second operand 6 states and 762 transitions. [2023-08-26 20:05:49,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 262 transitions, 2633 flow [2023-08-26 20:05:50,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 262 transitions, 2601 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 20:05:50,047 INFO L231 Difference]: Finished difference. Result has 109 places, 105 transitions, 896 flow [2023-08-26 20:05:50,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=896, PETRI_PLACES=109, PETRI_TRANSITIONS=105} [2023-08-26 20:05:50,047 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 55 predicate places. [2023-08-26 20:05:50,047 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 105 transitions, 896 flow [2023-08-26 20:05:50,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 117.5) internal successors, (1175), 10 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:50,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:50,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:50,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 20:05:50,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:05:50,253 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:50,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:50,254 INFO L85 PathProgramCache]: Analyzing trace with hash -649437181, now seen corresponding path program 2 times [2023-08-26 20:05:50,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:50,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920329436] [2023-08-26 20:05:50,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:50,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:50,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:50,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920329436] [2023-08-26 20:05:50,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920329436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:50,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:50,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:05:50,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352564897] [2023-08-26 20:05:50,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:50,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:05:50,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:50,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:05:50,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:05:50,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:50,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 105 transitions, 896 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:50,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:50,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:50,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:51,721 INFO L124 PetriNetUnfolderBase]: 10510/13762 cut-off events. [2023-08-26 20:05:51,722 INFO L125 PetriNetUnfolderBase]: For 105642/109167 co-relation queries the response was YES. [2023-08-26 20:05:51,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76019 conditions, 13762 events. 10510/13762 cut-off events. For 105642/109167 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 68782 event pairs, 2681 based on Foata normal form. 1377/14840 useless extension candidates. Maximal degree in co-relation 75981. Up to 11387 conditions per place. [2023-08-26 20:05:51,962 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 195 selfloop transitions, 19 changer transitions 0/220 dead transitions. [2023-08-26 20:05:51,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 220 transitions, 2361 flow [2023-08-26 20:05:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:05:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:05:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 635 transitions. [2023-08-26 20:05:51,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2023-08-26 20:05:51,974 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 635 transitions. [2023-08-26 20:05:51,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 635 transitions. [2023-08-26 20:05:51,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:51,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 635 transitions. [2023-08-26 20:05:51,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:51,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:51,977 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:51,977 INFO L175 Difference]: Start difference. First operand has 109 places, 105 transitions, 896 flow. Second operand 5 states and 635 transitions. [2023-08-26 20:05:51,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 220 transitions, 2361 flow [2023-08-26 20:05:52,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 220 transitions, 2085 flow, removed 138 selfloop flow, removed 0 redundant places. [2023-08-26 20:05:52,409 INFO L231 Difference]: Finished difference. Result has 113 places, 106 transitions, 871 flow [2023-08-26 20:05:52,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=871, PETRI_PLACES=113, PETRI_TRANSITIONS=106} [2023-08-26 20:05:52,409 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 59 predicate places. [2023-08-26 20:05:52,409 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 106 transitions, 871 flow [2023-08-26 20:05:52,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:52,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:52,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:52,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 20:05:52,410 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:52,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:52,410 INFO L85 PathProgramCache]: Analyzing trace with hash 423940640, now seen corresponding path program 5 times [2023-08-26 20:05:52,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:52,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885432233] [2023-08-26 20:05:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:52,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:52,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:52,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885432233] [2023-08-26 20:05:52,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885432233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:52,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:52,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:05:52,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139585905] [2023-08-26 20:05:52,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:52,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:05:52,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:52,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:05:52,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:05:52,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:52,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 106 transitions, 871 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:52,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:52,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:52,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:53,952 INFO L124 PetriNetUnfolderBase]: 11668/15423 cut-off events. [2023-08-26 20:05:53,952 INFO L125 PetriNetUnfolderBase]: For 96127/101506 co-relation queries the response was YES. [2023-08-26 20:05:54,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76914 conditions, 15423 events. 11668/15423 cut-off events. For 96127/101506 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 78523 event pairs, 2706 based on Foata normal form. 2157/17499 useless extension candidates. Maximal degree in co-relation 76875. Up to 8358 conditions per place. [2023-08-26 20:05:54,083 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 209 selfloop transitions, 23 changer transitions 5/245 dead transitions. [2023-08-26 20:05:54,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 245 transitions, 2561 flow [2023-08-26 20:05:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:05:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:05:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 638 transitions. [2023-08-26 20:05:54,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48150943396226414 [2023-08-26 20:05:54,085 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 638 transitions. [2023-08-26 20:05:54,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 638 transitions. [2023-08-26 20:05:54,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:54,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 638 transitions. [2023-08-26 20:05:54,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:54,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:54,089 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:54,089 INFO L175 Difference]: Start difference. First operand has 113 places, 106 transitions, 871 flow. Second operand 5 states and 638 transitions. [2023-08-26 20:05:54,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 245 transitions, 2561 flow [2023-08-26 20:05:54,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 245 transitions, 2473 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-26 20:05:54,398 INFO L231 Difference]: Finished difference. Result has 117 places, 108 transitions, 920 flow [2023-08-26 20:05:54,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=920, PETRI_PLACES=117, PETRI_TRANSITIONS=108} [2023-08-26 20:05:54,399 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 63 predicate places. [2023-08-26 20:05:54,399 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 108 transitions, 920 flow [2023-08-26 20:05:54,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:54,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:54,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:54,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 20:05:54,399 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:54,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:54,400 INFO L85 PathProgramCache]: Analyzing trace with hash -49652703, now seen corresponding path program 3 times [2023-08-26 20:05:54,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:54,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978272279] [2023-08-26 20:05:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:54,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:54,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:54,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978272279] [2023-08-26 20:05:54,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978272279] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:54,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:54,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:05:54,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751147858] [2023-08-26 20:05:54,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:54,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:05:54,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:54,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:05:54,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:05:54,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:54,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 108 transitions, 920 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:54,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:54,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:54,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:55,988 INFO L124 PetriNetUnfolderBase]: 11967/15844 cut-off events. [2023-08-26 20:05:55,989 INFO L125 PetriNetUnfolderBase]: For 99375/104059 co-relation queries the response was YES. [2023-08-26 20:05:56,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81852 conditions, 15844 events. 11967/15844 cut-off events. For 99375/104059 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 83205 event pairs, 1719 based on Foata normal form. 1813/17477 useless extension candidates. Maximal degree in co-relation 81811. Up to 7009 conditions per place. [2023-08-26 20:05:56,123 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 205 selfloop transitions, 25 changer transitions 0/237 dead transitions. [2023-08-26 20:05:56,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 237 transitions, 2433 flow [2023-08-26 20:05:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:05:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:05:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 642 transitions. [2023-08-26 20:05:56,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48452830188679247 [2023-08-26 20:05:56,125 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 642 transitions. [2023-08-26 20:05:56,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 642 transitions. [2023-08-26 20:05:56,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:56,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 642 transitions. [2023-08-26 20:05:56,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:56,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:56,128 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:56,128 INFO L175 Difference]: Start difference. First operand has 117 places, 108 transitions, 920 flow. Second operand 5 states and 642 transitions. [2023-08-26 20:05:56,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 237 transitions, 2433 flow [2023-08-26 20:05:56,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 237 transitions, 2303 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-26 20:05:56,589 INFO L231 Difference]: Finished difference. Result has 121 places, 110 transitions, 973 flow [2023-08-26 20:05:56,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=973, PETRI_PLACES=121, PETRI_TRANSITIONS=110} [2023-08-26 20:05:56,589 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 67 predicate places. [2023-08-26 20:05:56,589 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 110 transitions, 973 flow [2023-08-26 20:05:56,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:56,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:56,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:56,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 20:05:56,590 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:56,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:56,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1969234176, now seen corresponding path program 1 times [2023-08-26 20:05:56,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:56,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204609881] [2023-08-26 20:05:56,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:56,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:56,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:56,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204609881] [2023-08-26 20:05:56,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204609881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:56,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:56,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:05:56,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279861712] [2023-08-26 20:05:56,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:56,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:05:56,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:56,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:05:56,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:05:56,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:56,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 110 transitions, 973 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:56,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:56,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:56,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:05:58,308 INFO L124 PetriNetUnfolderBase]: 12155/16105 cut-off events. [2023-08-26 20:05:58,308 INFO L125 PetriNetUnfolderBase]: For 125812/132228 co-relation queries the response was YES. [2023-08-26 20:05:58,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83056 conditions, 16105 events. 12155/16105 cut-off events. For 125812/132228 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 82900 event pairs, 1955 based on Foata normal form. 2620/18622 useless extension candidates. Maximal degree in co-relation 83013. Up to 7152 conditions per place. [2023-08-26 20:05:58,414 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 214 selfloop transitions, 23 changer transitions 0/246 dead transitions. [2023-08-26 20:05:58,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 246 transitions, 2744 flow [2023-08-26 20:05:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:05:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:05:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 640 transitions. [2023-08-26 20:05:58,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830188679245283 [2023-08-26 20:05:58,415 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 640 transitions. [2023-08-26 20:05:58,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 640 transitions. [2023-08-26 20:05:58,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:05:58,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 640 transitions. [2023-08-26 20:05:58,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:58,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:58,418 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:58,418 INFO L175 Difference]: Start difference. First operand has 121 places, 110 transitions, 973 flow. Second operand 5 states and 640 transitions. [2023-08-26 20:05:58,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 246 transitions, 2744 flow [2023-08-26 20:05:58,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 246 transitions, 2632 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-26 20:05:58,824 INFO L231 Difference]: Finished difference. Result has 125 places, 112 transitions, 1023 flow [2023-08-26 20:05:58,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1023, PETRI_PLACES=125, PETRI_TRANSITIONS=112} [2023-08-26 20:05:58,824 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 71 predicate places. [2023-08-26 20:05:58,824 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 112 transitions, 1023 flow [2023-08-26 20:05:58,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:58,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:05:58,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:58,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 20:05:58,825 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:05:58,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:05:58,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1523404586, now seen corresponding path program 2 times [2023-08-26 20:05:58,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:05:58,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369054346] [2023-08-26 20:05:58,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:05:58,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:05:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:05:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:05:58,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:05:58,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369054346] [2023-08-26 20:05:58,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369054346] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:05:58,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:05:58,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:05:58,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466647829] [2023-08-26 20:05:58,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:05:58,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:05:58,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:05:58,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:05:58,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:05:58,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:05:58,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 112 transitions, 1023 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:05:58,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:05:58,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:05:58,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:00,551 INFO L124 PetriNetUnfolderBase]: 12422/16479 cut-off events. [2023-08-26 20:06:00,552 INFO L125 PetriNetUnfolderBase]: For 142002/148330 co-relation queries the response was YES. [2023-08-26 20:06:00,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88278 conditions, 16479 events. 12422/16479 cut-off events. For 142002/148330 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 85851 event pairs, 2847 based on Foata normal form. 2671/19081 useless extension candidates. Maximal degree in co-relation 88233. Up to 9613 conditions per place. [2023-08-26 20:06:00,693 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 231 selfloop transitions, 18 changer transitions 5/263 dead transitions. [2023-08-26 20:06:00,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 263 transitions, 2867 flow [2023-08-26 20:06:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:06:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:06:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 646 transitions. [2023-08-26 20:06:00,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48754716981132074 [2023-08-26 20:06:00,695 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 646 transitions. [2023-08-26 20:06:00,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 646 transitions. [2023-08-26 20:06:00,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:00,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 646 transitions. [2023-08-26 20:06:00,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.2) internal successors, (646), 5 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:00,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:00,697 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:00,697 INFO L175 Difference]: Start difference. First operand has 125 places, 112 transitions, 1023 flow. Second operand 5 states and 646 transitions. [2023-08-26 20:06:00,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 263 transitions, 2867 flow [2023-08-26 20:06:01,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 263 transitions, 2823 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 20:06:01,168 INFO L231 Difference]: Finished difference. Result has 129 places, 114 transitions, 1068 flow [2023-08-26 20:06:01,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1068, PETRI_PLACES=129, PETRI_TRANSITIONS=114} [2023-08-26 20:06:01,169 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2023-08-26 20:06:01,169 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 114 transitions, 1068 flow [2023-08-26 20:06:01,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:01,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:01,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:01,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 20:06:01,169 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:01,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:01,170 INFO L85 PathProgramCache]: Analyzing trace with hash -125081020, now seen corresponding path program 3 times [2023-08-26 20:06:01,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:01,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634407092] [2023-08-26 20:06:01,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:01,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:01,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:01,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634407092] [2023-08-26 20:06:01,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634407092] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:06:01,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132235272] [2023-08-26 20:06:01,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 20:06:01,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:06:01,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:06:01,241 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:06:01,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 20:06:01,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 20:06:01,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:06:01,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 20:06:01,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:06:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:01,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:06:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:01,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132235272] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:06:01,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:06:01,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 20:06:01,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216441225] [2023-08-26 20:06:01,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:06:01,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 20:06:01,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:01,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 20:06:01,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-26 20:06:01,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:06:01,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 114 transitions, 1068 flow. Second operand has 10 states, 10 states have (on average 117.3) internal successors, (1173), 10 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:01,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:01,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:06:01,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:03,313 INFO L124 PetriNetUnfolderBase]: 13009/17245 cut-off events. [2023-08-26 20:06:03,313 INFO L125 PetriNetUnfolderBase]: For 153560/160090 co-relation queries the response was YES. [2023-08-26 20:06:03,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93860 conditions, 17245 events. 13009/17245 cut-off events. For 153560/160090 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 89439 event pairs, 3833 based on Foata normal form. 2817/19972 useless extension candidates. Maximal degree in co-relation 93813. Up to 13074 conditions per place. [2023-08-26 20:06:03,462 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 247 selfloop transitions, 23 changer transitions 0/279 dead transitions. [2023-08-26 20:06:03,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 279 transitions, 3150 flow [2023-08-26 20:06:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:06:03,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:06:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 758 transitions. [2023-08-26 20:06:03,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4767295597484277 [2023-08-26 20:06:03,466 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 758 transitions. [2023-08-26 20:06:03,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 758 transitions. [2023-08-26 20:06:03,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:03,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 758 transitions. [2023-08-26 20:06:03,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:03,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 265.0) internal successors, (1855), 7 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:03,469 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 265.0) internal successors, (1855), 7 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:03,469 INFO L175 Difference]: Start difference. First operand has 129 places, 114 transitions, 1068 flow. Second operand 6 states and 758 transitions. [2023-08-26 20:06:03,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 279 transitions, 3150 flow [2023-08-26 20:06:04,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 279 transitions, 3103 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-26 20:06:04,335 INFO L231 Difference]: Finished difference. Result has 133 places, 117 transitions, 1107 flow [2023-08-26 20:06:04,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1107, PETRI_PLACES=133, PETRI_TRANSITIONS=117} [2023-08-26 20:06:04,335 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2023-08-26 20:06:04,336 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 117 transitions, 1107 flow [2023-08-26 20:06:04,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 117.3) internal successors, (1173), 10 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:04,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:04,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:04,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 20:06:04,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:06:04,541 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:04,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:04,541 INFO L85 PathProgramCache]: Analyzing trace with hash 23300422, now seen corresponding path program 4 times [2023-08-26 20:06:04,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:04,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797676940] [2023-08-26 20:06:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:04,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:04,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:04,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797676940] [2023-08-26 20:06:04,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797676940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:06:04,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:06:04,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:06:04,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767212939] [2023-08-26 20:06:04,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:06:04,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:06:04,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:04,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:06:04,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:06:04,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:06:04,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 117 transitions, 1107 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:04,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:04,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:06:04,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:06,462 INFO L124 PetriNetUnfolderBase]: 13275/17631 cut-off events. [2023-08-26 20:06:06,463 INFO L125 PetriNetUnfolderBase]: For 154014/160710 co-relation queries the response was YES. [2023-08-26 20:06:06,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97313 conditions, 17631 events. 13275/17631 cut-off events. For 154014/160710 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 92054 event pairs, 3799 based on Foata normal form. 2833/20374 useless extension candidates. Maximal degree in co-relation 97265. Up to 13108 conditions per place. [2023-08-26 20:06:06,611 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 210 selfloop transitions, 23 changer transitions 5/247 dead transitions. [2023-08-26 20:06:06,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 247 transitions, 2766 flow [2023-08-26 20:06:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:06:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:06:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 637 transitions. [2023-08-26 20:06:06,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807547169811321 [2023-08-26 20:06:06,613 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 637 transitions. [2023-08-26 20:06:06,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 637 transitions. [2023-08-26 20:06:06,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:06,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 637 transitions. [2023-08-26 20:06:06,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:06,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:06,617 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:06,617 INFO L175 Difference]: Start difference. First operand has 133 places, 117 transitions, 1107 flow. Second operand 5 states and 637 transitions. [2023-08-26 20:06:06,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 247 transitions, 2766 flow [2023-08-26 20:06:07,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 247 transitions, 2729 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-26 20:06:07,449 INFO L231 Difference]: Finished difference. Result has 136 places, 118 transitions, 1143 flow [2023-08-26 20:06:07,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1143, PETRI_PLACES=136, PETRI_TRANSITIONS=118} [2023-08-26 20:06:07,450 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2023-08-26 20:06:07,450 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 118 transitions, 1143 flow [2023-08-26 20:06:07,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:07,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:07,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:07,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 20:06:07,451 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:07,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:07,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1834484034, now seen corresponding path program 6 times [2023-08-26 20:06:07,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:07,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421944414] [2023-08-26 20:06:07,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:07,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:07,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:07,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421944414] [2023-08-26 20:06:07,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421944414] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:06:07,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:06:07,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:06:07,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298535265] [2023-08-26 20:06:07,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:06:07,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:06:07,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:07,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:06:07,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:06:07,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:06:07,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 118 transitions, 1143 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:07,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:07,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:06:07,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:09,267 INFO L124 PetriNetUnfolderBase]: 12749/16893 cut-off events. [2023-08-26 20:06:09,267 INFO L125 PetriNetUnfolderBase]: For 158959/165280 co-relation queries the response was YES. [2023-08-26 20:06:09,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94164 conditions, 16893 events. 12749/16893 cut-off events. For 158959/165280 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 87145 event pairs, 3509 based on Foata normal form. 2666/19456 useless extension candidates. Maximal degree in co-relation 94115. Up to 11635 conditions per place. [2023-08-26 20:06:09,401 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 200 selfloop transitions, 29 changer transitions 5/243 dead transitions. [2023-08-26 20:06:09,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 243 transitions, 2777 flow [2023-08-26 20:06:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:06:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:06:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 633 transitions. [2023-08-26 20:06:09,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47773584905660377 [2023-08-26 20:06:09,403 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 633 transitions. [2023-08-26 20:06:09,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 633 transitions. [2023-08-26 20:06:09,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:09,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 633 transitions. [2023-08-26 20:06:09,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:09,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:09,406 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:09,406 INFO L175 Difference]: Start difference. First operand has 136 places, 118 transitions, 1143 flow. Second operand 5 states and 633 transitions. [2023-08-26 20:06:09,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 243 transitions, 2777 flow [2023-08-26 20:06:10,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 243 transitions, 2719 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-26 20:06:10,172 INFO L231 Difference]: Finished difference. Result has 138 places, 119 transitions, 1167 flow [2023-08-26 20:06:10,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1167, PETRI_PLACES=138, PETRI_TRANSITIONS=119} [2023-08-26 20:06:10,172 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2023-08-26 20:06:10,173 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 119 transitions, 1167 flow [2023-08-26 20:06:10,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:10,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:10,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:10,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 20:06:10,173 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:10,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:10,174 INFO L85 PathProgramCache]: Analyzing trace with hash -800415612, now seen corresponding path program 5 times [2023-08-26 20:06:10,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:10,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239211099] [2023-08-26 20:06:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:10,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:10,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:10,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239211099] [2023-08-26 20:06:10,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239211099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:06:10,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:06:10,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:06:10,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832772754] [2023-08-26 20:06:10,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:06:10,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:06:10,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:06:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:06:10,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:06:10,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 119 transitions, 1167 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:10,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:10,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:06:10,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:12,094 INFO L124 PetriNetUnfolderBase]: 12577/16721 cut-off events. [2023-08-26 20:06:12,095 INFO L125 PetriNetUnfolderBase]: For 152518/158839 co-relation queries the response was YES. [2023-08-26 20:06:12,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92910 conditions, 16721 events. 12577/16721 cut-off events. For 152518/158839 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 87058 event pairs, 3335 based on Foata normal form. 2752/19370 useless extension candidates. Maximal degree in co-relation 92860. Up to 11083 conditions per place. [2023-08-26 20:06:12,282 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 207 selfloop transitions, 29 changer transitions 0/245 dead transitions. [2023-08-26 20:06:12,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 245 transitions, 2813 flow [2023-08-26 20:06:12,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:06:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:06:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 635 transitions. [2023-08-26 20:06:12,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2023-08-26 20:06:12,283 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 635 transitions. [2023-08-26 20:06:12,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 635 transitions. [2023-08-26 20:06:12,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:12,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 635 transitions. [2023-08-26 20:06:12,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:12,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:12,286 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:12,287 INFO L175 Difference]: Start difference. First operand has 138 places, 119 transitions, 1167 flow. Second operand 5 states and 635 transitions. [2023-08-26 20:06:12,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 245 transitions, 2813 flow [2023-08-26 20:06:13,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 245 transitions, 2751 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 20:06:13,040 INFO L231 Difference]: Finished difference. Result has 140 places, 120 transitions, 1186 flow [2023-08-26 20:06:13,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1186, PETRI_PLACES=140, PETRI_TRANSITIONS=120} [2023-08-26 20:06:13,040 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2023-08-26 20:06:13,040 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 120 transitions, 1186 flow [2023-08-26 20:06:13,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:13,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:13,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:13,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 20:06:13,041 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:13,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:13,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1414080088, now seen corresponding path program 6 times [2023-08-26 20:06:13,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:13,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175629647] [2023-08-26 20:06:13,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:13,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:13,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:13,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175629647] [2023-08-26 20:06:13,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175629647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:06:13,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:06:13,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:06:13,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46985789] [2023-08-26 20:06:13,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:06:13,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:06:13,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:13,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:06:13,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:06:13,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:06:13,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 120 transitions, 1186 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:13,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:13,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:06:13,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:14,943 INFO L124 PetriNetUnfolderBase]: 11925/15821 cut-off events. [2023-08-26 20:06:14,944 INFO L125 PetriNetUnfolderBase]: For 146060/152017 co-relation queries the response was YES. [2023-08-26 20:06:15,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88293 conditions, 15821 events. 11925/15821 cut-off events. For 146060/152017 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 81676 event pairs, 3289 based on Foata normal form. 2540/18258 useless extension candidates. Maximal degree in co-relation 88242. Up to 10857 conditions per place. [2023-08-26 20:06:15,067 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 206 selfloop transitions, 29 changer transitions 5/249 dead transitions. [2023-08-26 20:06:15,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 249 transitions, 2849 flow [2023-08-26 20:06:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:06:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:06:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 637 transitions. [2023-08-26 20:06:15,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807547169811321 [2023-08-26 20:06:15,070 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 637 transitions. [2023-08-26 20:06:15,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 637 transitions. [2023-08-26 20:06:15,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:15,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 637 transitions. [2023-08-26 20:06:15,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:15,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:15,071 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:15,072 INFO L175 Difference]: Start difference. First operand has 140 places, 120 transitions, 1186 flow. Second operand 5 states and 637 transitions. [2023-08-26 20:06:15,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 249 transitions, 2849 flow [2023-08-26 20:06:15,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 249 transitions, 2784 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 20:06:15,680 INFO L231 Difference]: Finished difference. Result has 141 places, 121 transitions, 1202 flow [2023-08-26 20:06:15,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1202, PETRI_PLACES=141, PETRI_TRANSITIONS=121} [2023-08-26 20:06:15,680 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 87 predicate places. [2023-08-26 20:06:15,681 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 121 transitions, 1202 flow [2023-08-26 20:06:15,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:15,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:15,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:15,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-26 20:06:15,681 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:15,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:15,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1775956197, now seen corresponding path program 4 times [2023-08-26 20:06:15,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:15,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273237652] [2023-08-26 20:06:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:15,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:15,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:15,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273237652] [2023-08-26 20:06:15,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273237652] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:06:15,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:06:15,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:06:15,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75719589] [2023-08-26 20:06:15,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:06:15,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:06:15,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:15,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:06:15,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:06:15,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:06:15,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 121 transitions, 1202 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:15,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:15,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:06:15,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:17,671 INFO L124 PetriNetUnfolderBase]: 11734/15579 cut-off events. [2023-08-26 20:06:17,671 INFO L125 PetriNetUnfolderBase]: For 162405/169019 co-relation queries the response was YES. [2023-08-26 20:06:17,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87225 conditions, 15579 events. 11734/15579 cut-off events. For 162405/169019 co-relation queries the response was YES. Maximal size of possible extension queue 1094. Compared 82928 event pairs, 3596 based on Foata normal form. 2431/17704 useless extension candidates. Maximal degree in co-relation 87174. Up to 12170 conditions per place. [2023-08-26 20:06:17,814 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 224 selfloop transitions, 22 changer transitions 12/267 dead transitions. [2023-08-26 20:06:17,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 267 transitions, 3233 flow [2023-08-26 20:06:17,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:06:17,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:06:17,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 637 transitions. [2023-08-26 20:06:17,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807547169811321 [2023-08-26 20:06:17,816 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 637 transitions. [2023-08-26 20:06:17,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 637 transitions. [2023-08-26 20:06:17,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:17,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 637 transitions. [2023-08-26 20:06:17,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:17,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:17,818 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:17,818 INFO L175 Difference]: Start difference. First operand has 141 places, 121 transitions, 1202 flow. Second operand 5 states and 637 transitions. [2023-08-26 20:06:17,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 267 transitions, 3233 flow [2023-08-26 20:06:18,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 267 transitions, 3077 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-08-26 20:06:18,335 INFO L231 Difference]: Finished difference. Result has 144 places, 122 transitions, 1227 flow [2023-08-26 20:06:18,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1227, PETRI_PLACES=144, PETRI_TRANSITIONS=122} [2023-08-26 20:06:18,336 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 90 predicate places. [2023-08-26 20:06:18,336 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 122 transitions, 1227 flow [2023-08-26 20:06:18,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:18,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:18,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:18,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-26 20:06:18,337 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:18,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:18,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2006623494, now seen corresponding path program 6 times [2023-08-26 20:06:18,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:18,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294493331] [2023-08-26 20:06:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:18,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:18,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:18,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294493331] [2023-08-26 20:06:18,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294493331] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:06:18,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:06:18,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:06:18,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090229983] [2023-08-26 20:06:18,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:06:18,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:06:18,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:18,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:06:18,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:06:18,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:06:18,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 122 transitions, 1227 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:18,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:18,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:06:18,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:20,041 INFO L124 PetriNetUnfolderBase]: 11192/14869 cut-off events. [2023-08-26 20:06:20,042 INFO L125 PetriNetUnfolderBase]: For 152781/158288 co-relation queries the response was YES. [2023-08-26 20:06:20,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82469 conditions, 14869 events. 11192/14869 cut-off events. For 152781/158288 co-relation queries the response was YES. Maximal size of possible extension queue 1052. Compared 77794 event pairs, 2656 based on Foata normal form. 1989/16567 useless extension candidates. Maximal degree in co-relation 82417. Up to 9580 conditions per place. [2023-08-26 20:06:20,157 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 213 selfloop transitions, 29 changer transitions 12/263 dead transitions. [2023-08-26 20:06:20,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 263 transitions, 3125 flow [2023-08-26 20:06:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:06:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:06:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 633 transitions. [2023-08-26 20:06:20,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47773584905660377 [2023-08-26 20:06:20,159 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 633 transitions. [2023-08-26 20:06:20,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 633 transitions. [2023-08-26 20:06:20,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:20,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 633 transitions. [2023-08-26 20:06:20,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:20,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:20,161 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:20,161 INFO L175 Difference]: Start difference. First operand has 144 places, 122 transitions, 1227 flow. Second operand 5 states and 633 transitions. [2023-08-26 20:06:20,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 263 transitions, 3125 flow [2023-08-26 20:06:20,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 263 transitions, 3069 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-26 20:06:20,594 INFO L231 Difference]: Finished difference. Result has 146 places, 123 transitions, 1253 flow [2023-08-26 20:06:20,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1253, PETRI_PLACES=146, PETRI_TRANSITIONS=123} [2023-08-26 20:06:20,595 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 92 predicate places. [2023-08-26 20:06:20,595 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 123 transitions, 1253 flow [2023-08-26 20:06:20,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:20,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:20,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:20,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-26 20:06:20,595 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:20,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:20,596 INFO L85 PathProgramCache]: Analyzing trace with hash -238213431, now seen corresponding path program 5 times [2023-08-26 20:06:20,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:20,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531006217] [2023-08-26 20:06:20,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:20,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:20,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:20,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531006217] [2023-08-26 20:06:20,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531006217] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:06:20,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:06:20,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:06:20,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402718188] [2023-08-26 20:06:20,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:06:20,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:06:20,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:20,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:06:20,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:06:20,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:06:20,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 123 transitions, 1253 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:20,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:20,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:06:20,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:22,517 INFO L124 PetriNetUnfolderBase]: 11071/14749 cut-off events. [2023-08-26 20:06:22,517 INFO L125 PetriNetUnfolderBase]: For 152272/157847 co-relation queries the response was YES. [2023-08-26 20:06:22,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81777 conditions, 14749 events. 11071/14749 cut-off events. For 152272/157847 co-relation queries the response was YES. Maximal size of possible extension queue 1025. Compared 77495 event pairs, 2488 based on Foata normal form. 2064/16537 useless extension candidates. Maximal degree in co-relation 81724. Up to 9178 conditions per place. [2023-08-26 20:06:22,650 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 228 selfloop transitions, 29 changer transitions 0/266 dead transitions. [2023-08-26 20:06:22,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 266 transitions, 3179 flow [2023-08-26 20:06:22,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:06:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:06:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 635 transitions. [2023-08-26 20:06:22,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2023-08-26 20:06:22,651 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 635 transitions. [2023-08-26 20:06:22,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 635 transitions. [2023-08-26 20:06:22,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:22,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 635 transitions. [2023-08-26 20:06:22,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:22,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:22,653 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:22,653 INFO L175 Difference]: Start difference. First operand has 146 places, 123 transitions, 1253 flow. Second operand 5 states and 635 transitions. [2023-08-26 20:06:22,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 266 transitions, 3179 flow [2023-08-26 20:06:23,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 266 transitions, 3117 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 20:06:23,122 INFO L231 Difference]: Finished difference. Result has 148 places, 124 transitions, 1272 flow [2023-08-26 20:06:23,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1272, PETRI_PLACES=148, PETRI_TRANSITIONS=124} [2023-08-26 20:06:23,122 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2023-08-26 20:06:23,122 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 124 transitions, 1272 flow [2023-08-26 20:06:23,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:23,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:23,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:23,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-26 20:06:23,123 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:23,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:23,123 INFO L85 PathProgramCache]: Analyzing trace with hash 967319865, now seen corresponding path program 6 times [2023-08-26 20:06:23,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:23,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233729638] [2023-08-26 20:06:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:23,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:23,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:23,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233729638] [2023-08-26 20:06:23,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233729638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:06:23,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:06:23,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:06:23,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133272781] [2023-08-26 20:06:23,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:06:23,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:06:23,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:23,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:06:23,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:06:23,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:06:23,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 124 transitions, 1272 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:23,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:23,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:06:23,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:24,562 INFO L124 PetriNetUnfolderBase]: 10178/13511 cut-off events. [2023-08-26 20:06:24,562 INFO L125 PetriNetUnfolderBase]: For 137107/142115 co-relation queries the response was YES. [2023-08-26 20:06:24,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75404 conditions, 13511 events. 10178/13511 cut-off events. For 137107/142115 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 70833 event pairs, 2561 based on Foata normal form. 1929/15152 useless extension candidates. Maximal degree in co-relation 75350. Up to 8483 conditions per place. [2023-08-26 20:06:24,683 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 219 selfloop transitions, 29 changer transitions 12/269 dead transitions. [2023-08-26 20:06:24,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 269 transitions, 3199 flow [2023-08-26 20:06:24,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:06:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:06:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 637 transitions. [2023-08-26 20:06:24,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807547169811321 [2023-08-26 20:06:24,684 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 637 transitions. [2023-08-26 20:06:24,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 637 transitions. [2023-08-26 20:06:24,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:24,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 637 transitions. [2023-08-26 20:06:24,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:24,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:24,686 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:24,686 INFO L175 Difference]: Start difference. First operand has 148 places, 124 transitions, 1272 flow. Second operand 5 states and 637 transitions. [2023-08-26 20:06:24,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 269 transitions, 3199 flow [2023-08-26 20:06:25,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 269 transitions, 3134 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 20:06:25,150 INFO L231 Difference]: Finished difference. Result has 149 places, 125 transitions, 1288 flow [2023-08-26 20:06:25,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1288, PETRI_PLACES=149, PETRI_TRANSITIONS=125} [2023-08-26 20:06:25,151 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 95 predicate places. [2023-08-26 20:06:25,151 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 125 transitions, 1288 flow [2023-08-26 20:06:25,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:25,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:25,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:25,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-26 20:06:25,152 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:25,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:25,152 INFO L85 PathProgramCache]: Analyzing trace with hash -243980241, now seen corresponding path program 1 times [2023-08-26 20:06:25,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:25,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497022673] [2023-08-26 20:06:25,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:25,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:06:25,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:25,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497022673] [2023-08-26 20:06:25,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497022673] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:06:25,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:06:25,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:06:25,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034861090] [2023-08-26 20:06:25,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:06:25,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:06:25,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:25,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:06:25,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:06:25,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 265 [2023-08-26 20:06:25,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 125 transitions, 1288 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:25,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:25,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 265 [2023-08-26 20:06:25,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:25,942 INFO L124 PetriNetUnfolderBase]: 5996/8111 cut-off events. [2023-08-26 20:06:25,943 INFO L125 PetriNetUnfolderBase]: For 100352/106255 co-relation queries the response was YES. [2023-08-26 20:06:25,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44931 conditions, 8111 events. 5996/8111 cut-off events. For 100352/106255 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 41945 event pairs, 1692 based on Foata normal form. 2552/10467 useless extension candidates. Maximal degree in co-relation 44877. Up to 5934 conditions per place. [2023-08-26 20:06:26,002 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 109 selfloop transitions, 10 changer transitions 21/156 dead transitions. [2023-08-26 20:06:26,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 156 transitions, 1782 flow [2023-08-26 20:06:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:06:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:06:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-26 20:06:26,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345911949685535 [2023-08-26 20:06:26,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-26 20:06:26,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-26 20:06:26,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:26,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-26 20:06:26,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:26,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:26,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:26,005 INFO L175 Difference]: Start difference. First operand has 149 places, 125 transitions, 1288 flow. Second operand 3 states and 425 transitions. [2023-08-26 20:06:26,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 156 transitions, 1782 flow [2023-08-26 20:06:26,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 156 transitions, 1736 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-26 20:06:26,249 INFO L231 Difference]: Finished difference. Result has 150 places, 108 transitions, 1087 flow [2023-08-26 20:06:26,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1087, PETRI_PLACES=150, PETRI_TRANSITIONS=108} [2023-08-26 20:06:26,250 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 96 predicate places. [2023-08-26 20:06:26,250 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 108 transitions, 1087 flow [2023-08-26 20:06:26,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:26,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:26,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:26,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-26 20:06:26,251 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:26,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:26,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1319085534, now seen corresponding path program 1 times [2023-08-26 20:06:26,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:26,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98533393] [2023-08-26 20:06:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:26,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:26,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:26,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98533393] [2023-08-26 20:06:26,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98533393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:06:26,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519441495] [2023-08-26 20:06:26,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:26,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:06:26,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:06:26,399 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:06:26,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 20:06:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:26,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 20:06:26,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:06:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:26,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:06:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:06:26,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519441495] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:06:26,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:06:26,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-26 20:06:26,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416897931] [2023-08-26 20:06:26,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:06:26,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 20:06:26,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:26,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 20:06:26,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:06:26,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 265 [2023-08-26 20:06:26,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 108 transitions, 1087 flow. Second operand has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:26,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:26,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 265 [2023-08-26 20:06:26,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:28,192 INFO L124 PetriNetUnfolderBase]: 11429/15539 cut-off events. [2023-08-26 20:06:28,192 INFO L125 PetriNetUnfolderBase]: For 150969/159772 co-relation queries the response was YES. [2023-08-26 20:06:28,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78859 conditions, 15539 events. 11429/15539 cut-off events. For 150969/159772 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 84426 event pairs, 1079 based on Foata normal form. 4189/19637 useless extension candidates. Maximal degree in co-relation 78804. Up to 8189 conditions per place. [2023-08-26 20:06:28,348 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 243 selfloop transitions, 107 changer transitions 5/371 dead transitions. [2023-08-26 20:06:28,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 371 transitions, 4050 flow [2023-08-26 20:06:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:06:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:06:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1003 transitions. [2023-08-26 20:06:28,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540700808625337 [2023-08-26 20:06:28,350 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1003 transitions. [2023-08-26 20:06:28,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1003 transitions. [2023-08-26 20:06:28,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:28,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1003 transitions. [2023-08-26 20:06:28,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.28571428571428) internal successors, (1003), 7 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:28,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:28,353 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:28,353 INFO L175 Difference]: Start difference. First operand has 150 places, 108 transitions, 1087 flow. Second operand 7 states and 1003 transitions. [2023-08-26 20:06:28,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 371 transitions, 4050 flow [2023-08-26 20:06:29,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 371 transitions, 3933 flow, removed 9 selfloop flow, removed 16 redundant places. [2023-08-26 20:06:29,185 INFO L231 Difference]: Finished difference. Result has 135 places, 199 transitions, 2331 flow [2023-08-26 20:06:29,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2331, PETRI_PLACES=135, PETRI_TRANSITIONS=199} [2023-08-26 20:06:29,185 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 81 predicate places. [2023-08-26 20:06:29,186 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 199 transitions, 2331 flow [2023-08-26 20:06:29,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:29,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:29,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:29,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 20:06:29,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-26 20:06:29,387 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:29,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:29,387 INFO L85 PathProgramCache]: Analyzing trace with hash -779538940, now seen corresponding path program 2 times [2023-08-26 20:06:29,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:29,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496104711] [2023-08-26 20:06:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:29,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:29,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:29,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496104711] [2023-08-26 20:06:29,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496104711] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:06:29,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660544603] [2023-08-26 20:06:29,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 20:06:29,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:06:29,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:06:29,512 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:06:29,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 20:06:29,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:06:29,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:06:29,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 20:06:29,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:06:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:29,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:06:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:29,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660544603] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:06:29,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:06:29,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-26 20:06:29,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146428522] [2023-08-26 20:06:29,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:06:29,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 20:06:29,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:29,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 20:06:29,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:06:29,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 265 [2023-08-26 20:06:29,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 199 transitions, 2331 flow. Second operand has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:29,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:29,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 265 [2023-08-26 20:06:29,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:31,969 INFO L124 PetriNetUnfolderBase]: 16677/22639 cut-off events. [2023-08-26 20:06:31,969 INFO L125 PetriNetUnfolderBase]: For 223118/234689 co-relation queries the response was YES. [2023-08-26 20:06:32,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121850 conditions, 22639 events. 16677/22639 cut-off events. For 223118/234689 co-relation queries the response was YES. Maximal size of possible extension queue 1242. Compared 128458 event pairs, 2606 based on Foata normal form. 4108/26676 useless extension candidates. Maximal degree in co-relation 121804. Up to 16543 conditions per place. [2023-08-26 20:06:32,236 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 328 selfloop transitions, 98 changer transitions 5/447 dead transitions. [2023-08-26 20:06:32,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 447 transitions, 5542 flow [2023-08-26 20:06:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:06:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:06:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 999 transitions. [2023-08-26 20:06:32,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538544474393531 [2023-08-26 20:06:32,238 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 999 transitions. [2023-08-26 20:06:32,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 999 transitions. [2023-08-26 20:06:32,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:32,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 999 transitions. [2023-08-26 20:06:32,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 142.71428571428572) internal successors, (999), 7 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:32,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:32,240 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:32,240 INFO L175 Difference]: Start difference. First operand has 135 places, 199 transitions, 2331 flow. Second operand 7 states and 999 transitions. [2023-08-26 20:06:32,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 447 transitions, 5542 flow [2023-08-26 20:06:33,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 447 transitions, 5302 flow, removed 120 selfloop flow, removed 0 redundant places. [2023-08-26 20:06:33,807 INFO L231 Difference]: Finished difference. Result has 144 places, 290 transitions, 3603 flow [2023-08-26 20:06:33,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3603, PETRI_PLACES=144, PETRI_TRANSITIONS=290} [2023-08-26 20:06:33,807 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 90 predicate places. [2023-08-26 20:06:33,808 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 290 transitions, 3603 flow [2023-08-26 20:06:33,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:33,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:33,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:33,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-26 20:06:34,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-26 20:06:34,014 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:34,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:34,015 INFO L85 PathProgramCache]: Analyzing trace with hash -523257333, now seen corresponding path program 3 times [2023-08-26 20:06:34,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:34,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118158236] [2023-08-26 20:06:34,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:34,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:34,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:34,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118158236] [2023-08-26 20:06:34,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118158236] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:06:34,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213316909] [2023-08-26 20:06:34,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 20:06:34,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:06:34,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:06:34,088 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:06:34,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 20:06:34,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 20:06:34,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:06:34,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 20:06:34,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:06:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:34,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:06:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:34,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213316909] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:06:34,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:06:34,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-26 20:06:34,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463163660] [2023-08-26 20:06:34,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:06:34,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 20:06:34,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:34,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 20:06:34,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-26 20:06:34,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:06:34,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 290 transitions, 3603 flow. Second operand has 11 states, 11 states have (on average 117.0909090909091) internal successors, (1288), 11 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:34,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:34,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:06:34,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:38,170 INFO L124 PetriNetUnfolderBase]: 24190/32811 cut-off events. [2023-08-26 20:06:38,170 INFO L125 PetriNetUnfolderBase]: For 346526/360324 co-relation queries the response was YES. [2023-08-26 20:06:38,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180470 conditions, 32811 events. 24190/32811 cut-off events. For 346526/360324 co-relation queries the response was YES. Maximal size of possible extension queue 1712. Compared 195911 event pairs, 1872 based on Foata normal form. 5292/37889 useless extension candidates. Maximal degree in co-relation 180420. Up to 11624 conditions per place. [2023-08-26 20:06:38,725 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 938 selfloop transitions, 63 changer transitions 0/1010 dead transitions. [2023-08-26 20:06:38,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 1010 transitions, 14213 flow [2023-08-26 20:06:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 20:06:38,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 20:06:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1279 transitions. [2023-08-26 20:06:38,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826415094339623 [2023-08-26 20:06:38,727 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1279 transitions. [2023-08-26 20:06:38,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1279 transitions. [2023-08-26 20:06:38,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:38,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1279 transitions. [2023-08-26 20:06:38,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 127.9) internal successors, (1279), 10 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:38,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 265.0) internal successors, (2915), 11 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:38,732 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 265.0) internal successors, (2915), 11 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:38,732 INFO L175 Difference]: Start difference. First operand has 144 places, 290 transitions, 3603 flow. Second operand 10 states and 1279 transitions. [2023-08-26 20:06:38,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 1010 transitions, 14213 flow [2023-08-26 20:06:41,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 1010 transitions, 13147 flow, removed 533 selfloop flow, removed 0 redundant places. [2023-08-26 20:06:41,254 INFO L231 Difference]: Finished difference. Result has 160 places, 331 transitions, 3903 flow [2023-08-26 20:06:41,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3903, PETRI_PLACES=160, PETRI_TRANSITIONS=331} [2023-08-26 20:06:41,254 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 106 predicate places. [2023-08-26 20:06:41,254 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 331 transitions, 3903 flow [2023-08-26 20:06:41,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 117.0909090909091) internal successors, (1288), 11 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:41,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:41,255 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:41,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-26 20:06:41,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-26 20:06:41,455 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:41,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:41,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1825158242, now seen corresponding path program 4 times [2023-08-26 20:06:41,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:41,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613672233] [2023-08-26 20:06:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:41,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:41,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:41,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613672233] [2023-08-26 20:06:41,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613672233] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:06:41,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413580851] [2023-08-26 20:06:41,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 20:06:41,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:06:41,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:06:41,525 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:06:41,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 20:06:41,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 20:06:41,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:06:41,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 20:06:41,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:06:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:41,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:06:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:41,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413580851] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:06:41,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:06:41,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-26 20:06:41,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414174264] [2023-08-26 20:06:41,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:06:41,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 20:06:41,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:41,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 20:06:41,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-26 20:06:41,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:06:41,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 331 transitions, 3903 flow. Second operand has 12 states, 12 states have (on average 116.91666666666667) internal successors, (1403), 12 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:41,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:41,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:06:41,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:47,892 INFO L124 PetriNetUnfolderBase]: 30166/40307 cut-off events. [2023-08-26 20:06:47,892 INFO L125 PetriNetUnfolderBase]: For 442927/456552 co-relation queries the response was YES. [2023-08-26 20:06:48,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234448 conditions, 40307 events. 30166/40307 cut-off events. For 442927/456552 co-relation queries the response was YES. Maximal size of possible extension queue 1962. Compared 233832 event pairs, 7020 based on Foata normal form. 5613/45348 useless extension candidates. Maximal degree in co-relation 234390. Up to 30085 conditions per place. [2023-08-26 20:06:48,367 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 1132 selfloop transitions, 150 changer transitions 0/1291 dead transitions. [2023-08-26 20:06:48,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 1291 transitions, 17266 flow [2023-08-26 20:06:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 20:06:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 20:06:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2116 transitions. [2023-08-26 20:06:48,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46970033296337405 [2023-08-26 20:06:48,369 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2116 transitions. [2023-08-26 20:06:48,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2116 transitions. [2023-08-26 20:06:48,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:48,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2116 transitions. [2023-08-26 20:06:48,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 124.47058823529412) internal successors, (2116), 17 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:48,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 265.0) internal successors, (4770), 18 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:48,374 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 265.0) internal successors, (4770), 18 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:48,374 INFO L175 Difference]: Start difference. First operand has 160 places, 331 transitions, 3903 flow. Second operand 17 states and 2116 transitions. [2023-08-26 20:06:48,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 1291 transitions, 17266 flow [2023-08-26 20:06:52,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 1291 transitions, 17034 flow, removed 101 selfloop flow, removed 2 redundant places. [2023-08-26 20:06:52,646 INFO L231 Difference]: Finished difference. Result has 179 places, 448 transitions, 5447 flow [2023-08-26 20:06:52,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=3789, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5447, PETRI_PLACES=179, PETRI_TRANSITIONS=448} [2023-08-26 20:06:52,648 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 125 predicate places. [2023-08-26 20:06:52,648 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 448 transitions, 5447 flow [2023-08-26 20:06:52,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 116.91666666666667) internal successors, (1403), 12 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:52,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:06:52,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:06:52,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-26 20:06:52,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-26 20:06:52,853 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:06:52,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:06:52,853 INFO L85 PathProgramCache]: Analyzing trace with hash -810352, now seen corresponding path program 5 times [2023-08-26 20:06:52,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:06:52,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328926781] [2023-08-26 20:06:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:06:52,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:06:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:06:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:52,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:06:52,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328926781] [2023-08-26 20:06:52,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328926781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:06:52,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609412136] [2023-08-26 20:06:52,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 20:06:52,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:06:52,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:06:52,924 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:06:52,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 20:06:53,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:06:53,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:06:53,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 20:06:53,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:06:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:53,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:06:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:06:53,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609412136] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:06:53,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:06:53,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-26 20:06:53,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33270218] [2023-08-26 20:06:53,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:06:53,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 20:06:53,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:06:53,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 20:06:53,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-26 20:06:53,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:06:53,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 448 transitions, 5447 flow. Second operand has 11 states, 11 states have (on average 117.0) internal successors, (1287), 11 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:53,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:06:53,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:06:53,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:06:59,113 INFO L124 PetriNetUnfolderBase]: 30724/41060 cut-off events. [2023-08-26 20:06:59,113 INFO L125 PetriNetUnfolderBase]: For 507892/523303 co-relation queries the response was YES. [2023-08-26 20:06:59,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254796 conditions, 41060 events. 30724/41060 cut-off events. For 507892/523303 co-relation queries the response was YES. Maximal size of possible extension queue 2089. Compared 239976 event pairs, 7702 based on Foata normal form. 5519/46116 useless extension candidates. Maximal degree in co-relation 254733. Up to 28271 conditions per place. [2023-08-26 20:06:59,783 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 654 selfloop transitions, 69 changer transitions 32/764 dead transitions. [2023-08-26 20:06:59,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 764 transitions, 10471 flow [2023-08-26 20:06:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:06:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:06:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 901 transitions. [2023-08-26 20:06:59,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-08-26 20:06:59,785 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 901 transitions. [2023-08-26 20:06:59,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 901 transitions. [2023-08-26 20:06:59,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:06:59,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 901 transitions. [2023-08-26 20:06:59,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.71428571428572) internal successors, (901), 7 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:59,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:59,787 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:06:59,788 INFO L175 Difference]: Start difference. First operand has 179 places, 448 transitions, 5447 flow. Second operand 7 states and 901 transitions. [2023-08-26 20:06:59,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 764 transitions, 10471 flow [2023-08-26 20:07:04,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 764 transitions, 9828 flow, removed 252 selfloop flow, removed 5 redundant places. [2023-08-26 20:07:04,338 INFO L231 Difference]: Finished difference. Result has 182 places, 451 transitions, 5004 flow [2023-08-26 20:07:04,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=4804, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5004, PETRI_PLACES=182, PETRI_TRANSITIONS=451} [2023-08-26 20:07:04,338 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 128 predicate places. [2023-08-26 20:07:04,339 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 451 transitions, 5004 flow [2023-08-26 20:07:04,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 117.0) internal successors, (1287), 11 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:04,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:07:04,339 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:07:04,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-26 20:07:04,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-26 20:07:04,543 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:07:04,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:07:04,544 INFO L85 PathProgramCache]: Analyzing trace with hash -886827053, now seen corresponding path program 6 times [2023-08-26 20:07:04,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:07:04,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191637261] [2023-08-26 20:07:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:07:04,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:07:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:07:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:07:04,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:07:04,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191637261] [2023-08-26 20:07:04,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191637261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:07:04,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469902291] [2023-08-26 20:07:04,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 20:07:04,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:07:04,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:07:04,621 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:07:04,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 20:07:04,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 20:07:04,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:07:04,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 20:07:04,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:07:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:07:04,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:07:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:07:04,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469902291] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:07:04,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:07:04,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-26 20:07:04,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167477522] [2023-08-26 20:07:04,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:07:04,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 20:07:04,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:07:04,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 20:07:04,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-26 20:07:04,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:07:04,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 451 transitions, 5004 flow. Second operand has 13 states, 13 states have (on average 117.38461538461539) internal successors, (1526), 13 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:04,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:07:04,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:07:04,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:07:12,263 INFO L124 PetriNetUnfolderBase]: 39006/52018 cut-off events. [2023-08-26 20:07:12,263 INFO L125 PetriNetUnfolderBase]: For 629393/647414 co-relation queries the response was YES. [2023-08-26 20:07:12,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318832 conditions, 52018 events. 39006/52018 cut-off events. For 629393/647414 co-relation queries the response was YES. Maximal size of possible extension queue 2373. Compared 307696 event pairs, 5032 based on Foata normal form. 8007/59594 useless extension candidates. Maximal degree in co-relation 318767. Up to 21449 conditions per place. [2023-08-26 20:07:13,086 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 1249 selfloop transitions, 138 changer transitions 0/1396 dead transitions. [2023-08-26 20:07:13,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1396 transitions, 18966 flow [2023-08-26 20:07:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 20:07:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 20:07:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1766 transitions. [2023-08-26 20:07:13,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476010781671159 [2023-08-26 20:07:13,088 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1766 transitions. [2023-08-26 20:07:13,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1766 transitions. [2023-08-26 20:07:13,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:07:13,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1766 transitions. [2023-08-26 20:07:13,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.14285714285714) internal successors, (1766), 14 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:13,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 265.0) internal successors, (3975), 15 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:13,091 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 265.0) internal successors, (3975), 15 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:13,092 INFO L175 Difference]: Start difference. First operand has 182 places, 451 transitions, 5004 flow. Second operand 14 states and 1766 transitions. [2023-08-26 20:07:13,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1396 transitions, 18966 flow [2023-08-26 20:07:20,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 1396 transitions, 18793 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-26 20:07:20,325 INFO L231 Difference]: Finished difference. Result has 198 places, 536 transitions, 6524 flow [2023-08-26 20:07:20,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=4846, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6524, PETRI_PLACES=198, PETRI_TRANSITIONS=536} [2023-08-26 20:07:20,325 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 144 predicate places. [2023-08-26 20:07:20,325 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 536 transitions, 6524 flow [2023-08-26 20:07:20,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 117.38461538461539) internal successors, (1526), 13 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:20,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:07:20,326 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:07:20,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-26 20:07:20,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-08-26 20:07:20,526 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:07:20,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:07:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1366224351, now seen corresponding path program 7 times [2023-08-26 20:07:20,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:07:20,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636050874] [2023-08-26 20:07:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:07:20,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:07:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:07:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:07:20,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:07:20,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636050874] [2023-08-26 20:07:20,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636050874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:07:20,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384062945] [2023-08-26 20:07:20,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 20:07:20,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:07:20,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:07:20,648 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:07:20,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-26 20:07:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:07:20,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 20:07:20,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:07:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:07:20,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:07:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:07:20,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384062945] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:07:20,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:07:20,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-26 20:07:20,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187074692] [2023-08-26 20:07:20,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:07:20,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 20:07:20,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:07:20,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 20:07:20,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-26 20:07:20,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:07:20,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 536 transitions, 6524 flow. Second operand has 12 states, 12 states have (on average 116.91666666666667) internal successors, (1403), 12 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:20,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:07:20,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:07:20,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:07:30,928 INFO L124 PetriNetUnfolderBase]: 47777/63466 cut-off events. [2023-08-26 20:07:30,928 INFO L125 PetriNetUnfolderBase]: For 1060338/1081954 co-relation queries the response was YES. [2023-08-26 20:07:31,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428118 conditions, 63466 events. 47777/63466 cut-off events. For 1060338/1081954 co-relation queries the response was YES. Maximal size of possible extension queue 2871. Compared 381104 event pairs, 4989 based on Foata normal form. 9105/72124 useless extension candidates. Maximal degree in co-relation 428047. Up to 25178 conditions per place. [2023-08-26 20:07:32,442 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 1308 selfloop transitions, 253 changer transitions 0/1570 dead transitions. [2023-08-26 20:07:32,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1570 transitions, 22239 flow [2023-08-26 20:07:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 20:07:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 20:07:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2006 transitions. [2023-08-26 20:07:32,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731132075471698 [2023-08-26 20:07:32,444 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2006 transitions. [2023-08-26 20:07:32,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2006 transitions. [2023-08-26 20:07:32,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:07:32,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2006 transitions. [2023-08-26 20:07:32,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 125.375) internal successors, (2006), 16 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:32,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 265.0) internal successors, (4505), 17 states have internal predecessors, (4505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:32,448 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 265.0) internal successors, (4505), 17 states have internal predecessors, (4505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:32,449 INFO L175 Difference]: Start difference. First operand has 198 places, 536 transitions, 6524 flow. Second operand 16 states and 2006 transitions. [2023-08-26 20:07:32,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 1570 transitions, 22239 flow [2023-08-26 20:07:46,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 1570 transitions, 21416 flow, removed 394 selfloop flow, removed 3 redundant places. [2023-08-26 20:07:46,855 INFO L231 Difference]: Finished difference. Result has 217 places, 644 transitions, 8302 flow [2023-08-26 20:07:46,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=5901, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8302, PETRI_PLACES=217, PETRI_TRANSITIONS=644} [2023-08-26 20:07:46,855 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 163 predicate places. [2023-08-26 20:07:46,855 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 644 transitions, 8302 flow [2023-08-26 20:07:46,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 116.91666666666667) internal successors, (1403), 12 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:46,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:07:46,856 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:07:46,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-26 20:07:47,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:07:47,060 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:07:47,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:07:47,060 INFO L85 PathProgramCache]: Analyzing trace with hash 278766449, now seen corresponding path program 8 times [2023-08-26 20:07:47,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:07:47,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016243473] [2023-08-26 20:07:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:07:47,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:07:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:07:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:07:47,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:07:47,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016243473] [2023-08-26 20:07:47,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016243473] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:07:47,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318130485] [2023-08-26 20:07:47,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 20:07:47,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:07:47,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:07:47,128 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:07:47,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-26 20:07:47,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:07:47,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:07:47,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 20:07:47,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:07:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:07:47,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:07:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:07:47,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318130485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:07:47,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:07:47,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-26 20:07:47,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611578695] [2023-08-26 20:07:47,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:07:47,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 20:07:47,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:07:47,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 20:07:47,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-26 20:07:47,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:07:47,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 644 transitions, 8302 flow. Second operand has 12 states, 12 states have (on average 116.91666666666667) internal successors, (1403), 12 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:47,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:07:47,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:07:47,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:07:58,318 INFO L124 PetriNetUnfolderBase]: 48273/64251 cut-off events. [2023-08-26 20:07:58,319 INFO L125 PetriNetUnfolderBase]: For 1180923/1202071 co-relation queries the response was YES. [2023-08-26 20:07:59,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456951 conditions, 64251 events. 48273/64251 cut-off events. For 1180923/1202071 co-relation queries the response was YES. Maximal size of possible extension queue 2911. Compared 388311 event pairs, 8027 based on Foata normal form. 7850/71408 useless extension candidates. Maximal degree in co-relation 456872. Up to 36045 conditions per place. [2023-08-26 20:07:59,512 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 1176 selfloop transitions, 194 changer transitions 21/1400 dead transitions. [2023-08-26 20:07:59,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 1400 transitions, 20178 flow [2023-08-26 20:07:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 20:07:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 20:07:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1624 transitions. [2023-08-26 20:07:59,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714078374455733 [2023-08-26 20:07:59,514 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1624 transitions. [2023-08-26 20:07:59,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1624 transitions. [2023-08-26 20:07:59,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:07:59,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1624 transitions. [2023-08-26 20:07:59,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 124.92307692307692) internal successors, (1624), 13 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:59,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 265.0) internal successors, (3710), 14 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:59,519 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 265.0) internal successors, (3710), 14 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:07:59,519 INFO L175 Difference]: Start difference. First operand has 217 places, 644 transitions, 8302 flow. Second operand 13 states and 1624 transitions. [2023-08-26 20:07:59,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 1400 transitions, 20178 flow [2023-08-26 20:08:17,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1400 transitions, 19474 flow, removed 284 selfloop flow, removed 7 redundant places. [2023-08-26 20:08:17,063 INFO L231 Difference]: Finished difference. Result has 224 places, 646 transitions, 8045 flow [2023-08-26 20:08:17,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=7600, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8045, PETRI_PLACES=224, PETRI_TRANSITIONS=646} [2023-08-26 20:08:17,064 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 170 predicate places. [2023-08-26 20:08:17,064 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 646 transitions, 8045 flow [2023-08-26 20:08:17,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 116.91666666666667) internal successors, (1403), 12 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:17,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:08:17,064 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:08:17,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-26 20:08:17,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:17,265 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:08:17,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:08:17,265 INFO L85 PathProgramCache]: Analyzing trace with hash -426685624, now seen corresponding path program 9 times [2023-08-26 20:08:17,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:08:17,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887939270] [2023-08-26 20:08:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:08:17,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:08:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:08:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:17,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:08:17,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887939270] [2023-08-26 20:08:17,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887939270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:08:17,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945129] [2023-08-26 20:08:17,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 20:08:17,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:08:17,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:08:17,335 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:08:17,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-26 20:08:17,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 20:08:17,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:08:17,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 20:08:17,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:08:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:17,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:08:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:08:17,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945129] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:08:17,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:08:17,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-26 20:08:17,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887900261] [2023-08-26 20:08:17,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:08:17,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 20:08:17,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:08:17,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 20:08:17,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-26 20:08:17,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 20:08:17,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 646 transitions, 8045 flow. Second operand has 13 states, 13 states have (on average 117.3076923076923) internal successors, (1525), 13 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:08:17,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:08:17,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 20:08:17,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand