/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 19:51:15,610 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 19:51:15,693 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 19:51:15,699 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 19:51:15,699 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 19:51:15,729 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 19:51:15,730 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 19:51:15,730 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 19:51:15,730 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 19:51:15,734 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 19:51:15,734 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 19:51:15,734 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 19:51:15,735 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 19:51:15,736 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 19:51:15,736 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 19:51:15,736 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 19:51:15,736 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 19:51:15,737 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 19:51:15,737 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 19:51:15,737 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 19:51:15,737 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 19:51:15,738 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 19:51:15,738 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 19:51:15,739 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 19:51:15,739 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 19:51:15,739 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 19:51:15,739 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 19:51:15,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:51:15,740 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 19:51:15,740 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 19:51:15,741 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 19:51:15,741 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 19:51:15,741 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 19:51:15,742 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 19:51:15,742 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 19:51:15,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 19:51:16,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 19:51:16,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 19:51:16,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 19:51:16,069 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 19:51:16,069 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 19:51:16,070 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2023-08-26 19:51:17,205 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 19:51:17,409 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 19:51:17,409 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2023-08-26 19:51:17,417 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e71969f7/52aac1a4ed0a4690805ac1096a9ad623/FLAGa6ce0f780 [2023-08-26 19:51:17,431 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e71969f7/52aac1a4ed0a4690805ac1096a9ad623 [2023-08-26 19:51:17,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 19:51:17,437 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 19:51:17,440 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 19:51:17,440 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 19:51:17,443 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 19:51:17,443 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:51:17" (1/1) ... [2023-08-26 19:51:17,444 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f1c808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:17, skipping insertion in model container [2023-08-26 19:51:17,444 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:51:17" (1/1) ... [2023-08-26 19:51:17,467 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 19:51:17,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:51:17,657 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 19:51:17,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:51:17,698 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 19:51:17,699 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 19:51:17,704 INFO L206 MainTranslator]: Completed translation [2023-08-26 19:51:17,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:17 WrapperNode [2023-08-26 19:51:17,705 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 19:51:17,706 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 19:51:17,706 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 19:51:17,707 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 19:51:17,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:17" (1/1) ... [2023-08-26 19:51:17,726 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:17" (1/1) ... [2023-08-26 19:51:17,747 INFO L138 Inliner]: procedures = 22, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2023-08-26 19:51:17,748 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 19:51:17,748 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 19:51:17,748 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 19:51:17,748 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 19:51:17,754 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:17" (1/1) ... [2023-08-26 19:51:17,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:17" (1/1) ... [2023-08-26 19:51:17,766 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:17" (1/1) ... [2023-08-26 19:51:17,766 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:17" (1/1) ... [2023-08-26 19:51:17,775 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:17" (1/1) ... [2023-08-26 19:51:17,783 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:17" (1/1) ... [2023-08-26 19:51:17,784 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:17" (1/1) ... [2023-08-26 19:51:17,785 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:17" (1/1) ... [2023-08-26 19:51:17,786 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 19:51:17,787 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 19:51:17,787 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 19:51:17,787 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 19:51:17,788 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:17" (1/1) ... [2023-08-26 19:51:17,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:51:17,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:17,817 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 19:51:17,829 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 19:51:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 19:51:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 19:51:17,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 19:51:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 19:51:17,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 19:51:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 19:51:17,858 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 19:51:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 19:51:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 19:51:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 19:51:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 19:51:17,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 19:51:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 19:51:17,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 19:51:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 19:51:17,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 19:51:17,860 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 19:51:17,964 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 19:51:17,969 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 19:51:18,278 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 19:51:18,300 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 19:51:18,300 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 19:51:18,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:51:18 BoogieIcfgContainer [2023-08-26 19:51:18,302 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 19:51:18,304 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 19:51:18,304 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 19:51:18,306 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 19:51:18,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:51:17" (1/3) ... [2023-08-26 19:51:18,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373b8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:51:18, skipping insertion in model container [2023-08-26 19:51:18,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:17" (2/3) ... [2023-08-26 19:51:18,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373b8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:51:18, skipping insertion in model container [2023-08-26 19:51:18,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:51:18" (3/3) ... [2023-08-26 19:51:18,310 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2023-08-26 19:51:18,327 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 19:51:18,328 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-26 19:51:18,328 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 19:51:18,402 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 19:51:18,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 140 transitions, 304 flow [2023-08-26 19:51:18,502 INFO L124 PetriNetUnfolderBase]: 16/137 cut-off events. [2023-08-26 19:51:18,503 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 19:51:18,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 137 events. 16/137 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 193 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-08-26 19:51:18,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 140 transitions, 304 flow [2023-08-26 19:51:18,516 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 126 transitions, 270 flow [2023-08-26 19:51:18,518 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 19:51:18,531 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 126 transitions, 270 flow [2023-08-26 19:51:18,538 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 126 transitions, 270 flow [2023-08-26 19:51:18,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 126 transitions, 270 flow [2023-08-26 19:51:18,600 INFO L124 PetriNetUnfolderBase]: 16/126 cut-off events. [2023-08-26 19:51:18,600 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 19:51:18,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 126 events. 16/126 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 189 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-08-26 19:51:18,604 INFO L119 LiptonReduction]: Number of co-enabled transitions 3888 [2023-08-26 19:51:23,084 INFO L134 LiptonReduction]: Checked pairs total: 3698 [2023-08-26 19:51:23,084 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-26 19:51:23,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 19:51:23,102 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;@77033d1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 19:51:23,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-26 19:51:23,103 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 19:51:23,103 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 19:51:23,103 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:51:23,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:23,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 19:51:23,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:23,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:23,108 INFO L85 PathProgramCache]: Analyzing trace with hash 573, now seen corresponding path program 1 times [2023-08-26 19:51:23,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:23,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786709349] [2023-08-26 19:51:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:23,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:23,197 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 19:51:23,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:23,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786709349] [2023-08-26 19:51:23,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786709349] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:23,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:23,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 19:51:23,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829770035] [2023-08-26 19:51:23,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:23,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 19:51:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:23,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 19:51:23,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 19:51:23,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 273 [2023-08-26 19:51:23,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 80 flow. Second operand has 2 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:23,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 273 [2023-08-26 19:51:23,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:23,344 INFO L124 PetriNetUnfolderBase]: 169/252 cut-off events. [2023-08-26 19:51:23,344 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 19:51:23,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 252 events. 169/252 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 543 event pairs, 81 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 380. Up to 253 conditions per place. [2023-08-26 19:51:23,351 INFO L140 encePairwiseOnDemand]: 271/273 looper letters, 29 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2023-08-26 19:51:23,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 134 flow [2023-08-26 19:51:23,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 19:51:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 19:51:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 285 transitions. [2023-08-26 19:51:23,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521978021978022 [2023-08-26 19:51:23,370 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 285 transitions. [2023-08-26 19:51:23,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 285 transitions. [2023-08-26 19:51:23,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:23,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 285 transitions. [2023-08-26 19:51:23,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 142.5) internal successors, (285), 2 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,383 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,384 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 80 flow. Second operand 2 states and 285 transitions. [2023-08-26 19:51:23,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 134 flow [2023-08-26 19:51:23,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 122 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 19:51:23,388 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 64 flow [2023-08-26 19:51:23,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-08-26 19:51:23,393 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-08-26 19:51:23,393 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 64 flow [2023-08-26 19:51:23,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:23,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:51:23,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 19:51:23,395 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:23,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:23,396 INFO L85 PathProgramCache]: Analyzing trace with hash 565614, now seen corresponding path program 1 times [2023-08-26 19:51:23,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:23,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511224144] [2023-08-26 19:51:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:23,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:23,658 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 19:51:23,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:23,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511224144] [2023-08-26 19:51:23,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511224144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:23,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:23,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:23,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709816716] [2023-08-26 19:51:23,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:23,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:23,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:23,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:23,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:23,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 273 [2023-08-26 19:51:23,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:23,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 273 [2023-08-26 19:51:23,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:23,715 INFO L124 PetriNetUnfolderBase]: 159/236 cut-off events. [2023-08-26 19:51:23,715 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 19:51:23,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 236 events. 159/236 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 495 event pairs, 76 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 479. Up to 236 conditions per place. [2023-08-26 19:51:23,717 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 26 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-26 19:51:23,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 114 flow [2023-08-26 19:51:23,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:23,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:23,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-08-26 19:51:23,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409035409035409 [2023-08-26 19:51:23,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-08-26 19:51:23,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-08-26 19:51:23,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:23,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-08-26 19:51:23,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,723 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 64 flow. Second operand 3 states and 335 transitions. [2023-08-26 19:51:23,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 114 flow [2023-08-26 19:51:23,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 114 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:51:23,724 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 62 flow [2023-08-26 19:51:23,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-26 19:51:23,725 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-08-26 19:51:23,725 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 62 flow [2023-08-26 19:51:23,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:23,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:51:23,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 19:51:23,726 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:23,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:23,726 INFO L85 PathProgramCache]: Analyzing trace with hash 565615, now seen corresponding path program 1 times [2023-08-26 19:51:23,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:23,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001203169] [2023-08-26 19:51:23,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:23,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:23,811 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 19:51:23,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:23,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001203169] [2023-08-26 19:51:23,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001203169] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:23,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:23,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:23,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623030494] [2023-08-26 19:51:23,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:23,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:23,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:23,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:23,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:23,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 273 [2023-08-26 19:51:23,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:23,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 273 [2023-08-26 19:51:23,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:23,866 INFO L124 PetriNetUnfolderBase]: 149/220 cut-off events. [2023-08-26 19:51:23,866 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:51:23,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 220 events. 149/220 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 455 event pairs, 71 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 448. Up to 220 conditions per place. [2023-08-26 19:51:23,868 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-26 19:51:23,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 108 flow [2023-08-26 19:51:23,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-26 19:51:23,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175824175824176 [2023-08-26 19:51:23,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-26 19:51:23,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-26 19:51:23,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:23,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-26 19:51:23,872 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 19:51:23,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,874 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 62 flow. Second operand 3 states and 342 transitions. [2023-08-26 19:51:23,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 108 flow [2023-08-26 19:51:23,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:23,875 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 59 flow [2023-08-26 19:51:23,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-08-26 19:51:23,876 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -8 predicate places. [2023-08-26 19:51:23,876 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 59 flow [2023-08-26 19:51:23,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:23,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:51:23,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 19:51:23,877 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:23,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:23,878 INFO L85 PathProgramCache]: Analyzing trace with hash 543570147, now seen corresponding path program 1 times [2023-08-26 19:51:23,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:23,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767952768] [2023-08-26 19:51:23,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:23,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:23,956 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 19:51:23,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:23,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767952768] [2023-08-26 19:51:23,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767952768] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:23,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:23,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:23,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227984792] [2023-08-26 19:51:23,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:23,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:23,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:23,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:23,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:23,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 273 [2023-08-26 19:51:23,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 59 flow. Second operand has 3 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 19:51:23,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:23,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 273 [2023-08-26 19:51:23,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:24,007 INFO L124 PetriNetUnfolderBase]: 139/204 cut-off events. [2023-08-26 19:51:24,008 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 19:51:24,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 204 events. 139/204 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 406 event pairs, 66 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 417. Up to 204 conditions per place. [2023-08-26 19:51:24,009 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 22 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-26 19:51:24,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 101 flow [2023-08-26 19:51:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-08-26 19:51:24,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41514041514041516 [2023-08-26 19:51:24,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-08-26 19:51:24,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-08-26 19:51:24,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:24,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-08-26 19:51:24,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,014 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,015 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 59 flow. Second operand 3 states and 340 transitions. [2023-08-26 19:51:24,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 101 flow [2023-08-26 19:51:24,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:24,016 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 56 flow [2023-08-26 19:51:24,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-26 19:51:24,017 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -9 predicate places. [2023-08-26 19:51:24,017 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 56 flow [2023-08-26 19:51:24,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 19:51:24,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:24,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:51:24,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 19:51:24,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:24,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:24,018 INFO L85 PathProgramCache]: Analyzing trace with hash 543570146, now seen corresponding path program 1 times [2023-08-26 19:51:24,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:24,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639182199] [2023-08-26 19:51:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:24,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:24,049 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 19:51:24,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:24,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639182199] [2023-08-26 19:51:24,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639182199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:24,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:24,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:24,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080852156] [2023-08-26 19:51:24,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:24,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:24,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:24,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:24,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:24,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 273 [2023-08-26 19:51:24,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:24,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 273 [2023-08-26 19:51:24,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:24,088 INFO L124 PetriNetUnfolderBase]: 129/188 cut-off events. [2023-08-26 19:51:24,089 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 19:51:24,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 188 events. 129/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 365 event pairs, 61 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 386. Up to 188 conditions per place. [2023-08-26 19:51:24,090 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 20 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-08-26 19:51:24,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 21 transitions, 94 flow [2023-08-26 19:51:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-08-26 19:51:24,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017094017094017 [2023-08-26 19:51:24,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-08-26 19:51:24,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-08-26 19:51:24,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:24,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-08-26 19:51:24,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,095 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 56 flow. Second operand 3 states and 329 transitions. [2023-08-26 19:51:24,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 21 transitions, 94 flow [2023-08-26 19:51:24,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 21 transitions, 93 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:24,096 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 53 flow [2023-08-26 19:51:24,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-08-26 19:51:24,096 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -10 predicate places. [2023-08-26 19:51:24,097 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 53 flow [2023-08-26 19:51:24,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:24,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:24,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 19:51:24,097 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:24,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:24,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1615087680, now seen corresponding path program 1 times [2023-08-26 19:51:24,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:24,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871985147] [2023-08-26 19:51:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:24,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:24,245 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 19:51:24,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:24,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871985147] [2023-08-26 19:51:24,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871985147] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:24,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:24,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:51:24,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853075983] [2023-08-26 19:51:24,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:24,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:51:24,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:24,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:51:24,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 19:51:24,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 273 [2023-08-26 19:51:24,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:24,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 273 [2023-08-26 19:51:24,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:24,290 INFO L124 PetriNetUnfolderBase]: 105/156 cut-off events. [2023-08-26 19:51:24,290 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 19:51:24,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 156 events. 105/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 275 event pairs, 49 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 323. Up to 156 conditions per place. [2023-08-26 19:51:24,291 INFO L140 encePairwiseOnDemand]: 271/273 looper letters, 19 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-26 19:51:24,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 20 transitions, 91 flow [2023-08-26 19:51:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 312 transitions. [2023-08-26 19:51:24,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2023-08-26 19:51:24,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 312 transitions. [2023-08-26 19:51:24,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 312 transitions. [2023-08-26 19:51:24,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:24,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 312 transitions. [2023-08-26 19:51:24,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,297 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 53 flow. Second operand 3 states and 312 transitions. [2023-08-26 19:51:24,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 20 transitions, 91 flow [2023-08-26 19:51:24,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 20 transitions, 90 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:24,299 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 52 flow [2023-08-26 19:51:24,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-26 19:51:24,301 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -10 predicate places. [2023-08-26 19:51:24,304 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 52 flow [2023-08-26 19:51:24,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:24,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:24,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 19:51:24,305 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:24,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:24,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1615087681, now seen corresponding path program 1 times [2023-08-26 19:51:24,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:24,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436591081] [2023-08-26 19:51:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:24,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:24,430 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 19:51:24,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:24,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436591081] [2023-08-26 19:51:24,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436591081] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:24,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:24,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 19:51:24,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859578876] [2023-08-26 19:51:24,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:24,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 19:51:24,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:24,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 19:51:24,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 19:51:24,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 273 [2023-08-26 19:51:24,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 97.4) internal successors, (487), 5 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:24,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 273 [2023-08-26 19:51:24,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:24,471 INFO L124 PetriNetUnfolderBase]: 81/124 cut-off events. [2023-08-26 19:51:24,471 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 19:51:24,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 124 events. 81/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 196 event pairs, 37 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 260. Up to 124 conditions per place. [2023-08-26 19:51:24,472 INFO L140 encePairwiseOnDemand]: 271/273 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-26 19:51:24,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 19 transitions, 88 flow [2023-08-26 19:51:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:24,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2023-08-26 19:51:24,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37606837606837606 [2023-08-26 19:51:24,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2023-08-26 19:51:24,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2023-08-26 19:51:24,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:24,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2023-08-26 19:51:24,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 19:51:24,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,479 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 52 flow. Second operand 3 states and 308 transitions. [2023-08-26 19:51:24,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 19 transitions, 88 flow [2023-08-26 19:51:24,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 87 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:24,480 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 51 flow [2023-08-26 19:51:24,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-26 19:51:24,481 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -10 predicate places. [2023-08-26 19:51:24,481 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 51 flow [2023-08-26 19:51:24,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.4) internal successors, (487), 5 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:24,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:24,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 19:51:24,486 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:24,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:24,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1205786038, now seen corresponding path program 1 times [2023-08-26 19:51:24,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:24,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739410418] [2023-08-26 19:51:24,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:24,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:24,562 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 19:51:24,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:24,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739410418] [2023-08-26 19:51:24,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739410418] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:24,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:24,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:51:24,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387542018] [2023-08-26 19:51:24,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:24,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:24,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:24,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 273 [2023-08-26 19:51:24,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:24,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 273 [2023-08-26 19:51:24,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:24,613 INFO L124 PetriNetUnfolderBase]: 111/168 cut-off events. [2023-08-26 19:51:24,613 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:51:24,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 168 events. 111/168 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 369 event pairs, 7 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 352. Up to 137 conditions per place. [2023-08-26 19:51:24,615 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 27 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-26 19:51:24,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 29 transitions, 131 flow [2023-08-26 19:51:24,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-26 19:51:24,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2023-08-26 19:51:24,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-26 19:51:24,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-26 19:51:24,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:24,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-26 19:51:24,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,619 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 51 flow. Second operand 3 states and 396 transitions. [2023-08-26 19:51:24,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 29 transitions, 131 flow [2023-08-26 19:51:24,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:24,620 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 62 flow [2023-08-26 19:51:24,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-26 19:51:24,621 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -8 predicate places. [2023-08-26 19:51:24,621 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 62 flow [2023-08-26 19:51:24,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:24,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:24,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 19:51:24,622 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:24,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:24,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1162997200, now seen corresponding path program 1 times [2023-08-26 19:51:24,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:24,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733603942] [2023-08-26 19:51:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:24,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:24,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:24,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733603942] [2023-08-26 19:51:24,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733603942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:24,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:24,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:51:24,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489993879] [2023-08-26 19:51:24,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:24,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:24,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:24,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:24,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:24,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 273 [2023-08-26 19:51:24,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:24,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 273 [2023-08-26 19:51:24,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:24,743 INFO L124 PetriNetUnfolderBase]: 161/240 cut-off events. [2023-08-26 19:51:24,744 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-26 19:51:24,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 240 events. 161/240 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 575 event pairs, 19 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 580. Up to 177 conditions per place. [2023-08-26 19:51:24,745 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 29 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-26 19:51:24,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 155 flow [2023-08-26 19:51:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:24,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:24,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-26 19:51:24,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2023-08-26 19:51:24,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-26 19:51:24,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-26 19:51:24,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:24,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-26 19:51:24,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,750 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 62 flow. Second operand 3 states and 396 transitions. [2023-08-26 19:51:24,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 155 flow [2023-08-26 19:51:24,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:24,752 INFO L231 Difference]: Finished difference. Result has 32 places, 21 transitions, 72 flow [2023-08-26 19:51:24,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=32, PETRI_TRANSITIONS=21} [2023-08-26 19:51:24,753 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-08-26 19:51:24,753 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 21 transitions, 72 flow [2023-08-26 19:51:24,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:24,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:24,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 19:51:24,754 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:24,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:24,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1143307623, now seen corresponding path program 1 times [2023-08-26 19:51:24,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:24,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952403871] [2023-08-26 19:51:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:24,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 19:51:24,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:24,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952403871] [2023-08-26 19:51:24,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952403871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:24,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:24,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:51:24,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210783010] [2023-08-26 19:51:24,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:24,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:24,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:24,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:24,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:24,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 273 [2023-08-26 19:51:24,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 21 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:24,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 273 [2023-08-26 19:51:24,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:24,914 INFO L124 PetriNetUnfolderBase]: 220/325 cut-off events. [2023-08-26 19:51:24,914 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2023-08-26 19:51:24,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 325 events. 220/325 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 800 event pairs, 48 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 869. Up to 199 conditions per place. [2023-08-26 19:51:24,916 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 31 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-26 19:51:24,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 177 flow [2023-08-26 19:51:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-26 19:51:24,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2023-08-26 19:51:24,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-26 19:51:24,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-26 19:51:24,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:24,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-26 19:51:24,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,921 INFO L175 Difference]: Start difference. First operand has 32 places, 21 transitions, 72 flow. Second operand 3 states and 396 transitions. [2023-08-26 19:51:24,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 177 flow [2023-08-26 19:51:24,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:24,922 INFO L231 Difference]: Finished difference. Result has 34 places, 22 transitions, 82 flow [2023-08-26 19:51:24,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=22} [2023-08-26 19:51:24,923 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-08-26 19:51:24,923 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 22 transitions, 82 flow [2023-08-26 19:51:24,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:24,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:24,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 19:51:24,924 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:24,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:24,924 INFO L85 PathProgramCache]: Analyzing trace with hash -8937664, now seen corresponding path program 1 times [2023-08-26 19:51:24,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:24,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109681074] [2023-08-26 19:51:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:24,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 19:51:25,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:25,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109681074] [2023-08-26 19:51:25,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109681074] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:25,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229890737] [2023-08-26 19:51:25,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:25,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:25,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:25,109 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 19:51:25,127 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 19:51:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:25,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 19:51:25,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 19:51:25,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 19:51:25,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229890737] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:25,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:25,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-26 19:51:25,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273382545] [2023-08-26 19:51:25,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:25,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:51:25,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:25,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:51:25,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:51:25,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 273 [2023-08-26 19:51:25,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 22 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 119.16666666666667) internal successors, (715), 6 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:25,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:25,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 273 [2023-08-26 19:51:25,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:25,610 INFO L124 PetriNetUnfolderBase]: 279/410 cut-off events. [2023-08-26 19:51:25,611 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-08-26 19:51:25,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 410 events. 279/410 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1205 event pairs, 20 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 1192. Up to 153 conditions per place. [2023-08-26 19:51:25,614 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 52 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-08-26 19:51:25,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 56 transitions, 309 flow [2023-08-26 19:51:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 19:51:25,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 19:51:25,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 624 transitions. [2023-08-26 19:51:25,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-08-26 19:51:25,616 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 624 transitions. [2023-08-26 19:51:25,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 624 transitions. [2023-08-26 19:51:25,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:25,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 624 transitions. [2023-08-26 19:51:25,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:25,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:25,622 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:25,622 INFO L175 Difference]: Start difference. First operand has 34 places, 22 transitions, 82 flow. Second operand 5 states and 624 transitions. [2023-08-26 19:51:25,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 56 transitions, 309 flow [2023-08-26 19:51:25,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 56 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:25,626 INFO L231 Difference]: Finished difference. Result has 38 places, 23 transitions, 96 flow [2023-08-26 19:51:25,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=38, PETRI_TRANSITIONS=23} [2023-08-26 19:51:25,627 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-08-26 19:51:25,627 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 23 transitions, 96 flow [2023-08-26 19:51:25,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.16666666666667) internal successors, (715), 6 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:25,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:25,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:25,637 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 19:51:25,832 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,SelfDestructingSolverStorable10 [2023-08-26 19:51:25,833 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:25,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:25,833 INFO L85 PathProgramCache]: Analyzing trace with hash -844546574, now seen corresponding path program 2 times [2023-08-26 19:51:25,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:25,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902497993] [2023-08-26 19:51:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-26 19:51:26,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:26,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902497993] [2023-08-26 19:51:26,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902497993] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:26,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168313710] [2023-08-26 19:51:26,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:51:26,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:26,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:26,039 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 19:51:26,066 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 19:51:26,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:51:26,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:26,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 19:51:26,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-26 19:51:26,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:26,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168313710] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:26,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:26,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 6] total 10 [2023-08-26 19:51:26,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457569672] [2023-08-26 19:51:26,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:26,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 19:51:26,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:26,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 19:51:26,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-08-26 19:51:26,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 273 [2023-08-26 19:51:26,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 23 transitions, 96 flow. Second operand has 11 states, 11 states have (on average 95.0) internal successors, (1045), 11 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:26,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 273 [2023-08-26 19:51:26,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:27,236 INFO L124 PetriNetUnfolderBase]: 475/690 cut-off events. [2023-08-26 19:51:27,237 INFO L125 PetriNetUnfolderBase]: For 813/813 co-relation queries the response was YES. [2023-08-26 19:51:27,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2185 conditions, 690 events. 475/690 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2162 event pairs, 8 based on Foata normal form. 32/622 useless extension candidates. Maximal degree in co-relation 2177. Up to 191 conditions per place. [2023-08-26 19:51:27,241 INFO L140 encePairwiseOnDemand]: 266/273 looper letters, 106 selfloop transitions, 59 changer transitions 0/165 dead transitions. [2023-08-26 19:51:27,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 165 transitions, 971 flow [2023-08-26 19:51:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-26 19:51:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-26 19:51:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2533 transitions. [2023-08-26 19:51:27,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3568610876303184 [2023-08-26 19:51:27,249 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2533 transitions. [2023-08-26 19:51:27,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2533 transitions. [2023-08-26 19:51:27,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:27,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2533 transitions. [2023-08-26 19:51:27,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 97.42307692307692) internal successors, (2533), 26 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:27,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 273.0) internal successors, (7371), 27 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:27,268 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 273.0) internal successors, (7371), 27 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:27,268 INFO L175 Difference]: Start difference. First operand has 38 places, 23 transitions, 96 flow. Second operand 26 states and 2533 transitions. [2023-08-26 19:51:27,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 165 transitions, 971 flow [2023-08-26 19:51:27,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 165 transitions, 946 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:27,275 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 607 flow [2023-08-26 19:51:27,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=607, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2023-08-26 19:51:27,277 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 40 predicate places. [2023-08-26 19:51:27,277 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 607 flow [2023-08-26 19:51:27,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 95.0) internal successors, (1045), 11 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:27,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:27,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:27,287 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 19:51:27,483 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,SelfDestructingSolverStorable11 [2023-08-26 19:51:27,484 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:27,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:27,484 INFO L85 PathProgramCache]: Analyzing trace with hash -799128973, now seen corresponding path program 3 times [2023-08-26 19:51:27,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:27,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247120469] [2023-08-26 19:51:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:27,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-26 19:51:27,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:27,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247120469] [2023-08-26 19:51:27,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247120469] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:27,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644202155] [2023-08-26 19:51:27,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:51:27,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:27,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:27,744 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 19:51:27,746 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 19:51:27,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 19:51:27,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:27,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 19:51:27,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-26 19:51:27,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-26 19:51:28,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644202155] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:28,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:28,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2023-08-26 19:51:28,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866365515] [2023-08-26 19:51:28,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:28,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:51:28,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:28,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:51:28,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:51:28,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 273 [2023-08-26 19:51:28,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 607 flow. Second operand has 9 states, 9 states have (on average 107.33333333333333) internal successors, (966), 9 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:28,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:28,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 273 [2023-08-26 19:51:28,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:28,354 INFO L124 PetriNetUnfolderBase]: 665/964 cut-off events. [2023-08-26 19:51:28,354 INFO L125 PetriNetUnfolderBase]: For 8042/8042 co-relation queries the response was YES. [2023-08-26 19:51:28,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5612 conditions, 964 events. 665/964 cut-off events. For 8042/8042 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3381 event pairs, 15 based on Foata normal form. 66/970 useless extension candidates. Maximal degree in co-relation 5587. Up to 325 conditions per place. [2023-08-26 19:51:28,365 INFO L140 encePairwiseOnDemand]: 268/273 looper letters, 152 selfloop transitions, 28 changer transitions 0/180 dead transitions. [2023-08-26 19:51:28,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 180 transitions, 1800 flow [2023-08-26 19:51:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 19:51:28,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 19:51:28,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 900 transitions. [2023-08-26 19:51:28,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41208791208791207 [2023-08-26 19:51:28,367 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 900 transitions. [2023-08-26 19:51:28,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 900 transitions. [2023-08-26 19:51:28,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:28,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 900 transitions. [2023-08-26 19:51:28,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.5) internal successors, (900), 8 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:28,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 273.0) internal successors, (2457), 9 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:28,373 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 273.0) internal successors, (2457), 9 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:28,373 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 607 flow. Second operand 8 states and 900 transitions. [2023-08-26 19:51:28,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 180 transitions, 1800 flow [2023-08-26 19:51:28,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 180 transitions, 1443 flow, removed 141 selfloop flow, removed 5 redundant places. [2023-08-26 19:51:28,403 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 619 flow [2023-08-26 19:51:28,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=619, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2023-08-26 19:51:28,404 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 44 predicate places. [2023-08-26 19:51:28,404 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 619 flow [2023-08-26 19:51:28,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 107.33333333333333) internal successors, (966), 9 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:28,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:28,405 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:28,415 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 19:51:28,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:28,610 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:28,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:28,611 INFO L85 PathProgramCache]: Analyzing trace with hash -103337180, now seen corresponding path program 4 times [2023-08-26 19:51:28,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:28,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062321031] [2023-08-26 19:51:28,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:28,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:29,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:29,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062321031] [2023-08-26 19:51:29,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062321031] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:29,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185741905] [2023-08-26 19:51:29,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:51:29,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:29,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:29,673 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 19:51:29,675 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 19:51:29,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:51:29,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:29,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-26 19:51:29,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:30,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:30,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185741905] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:30,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:30,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-08-26 19:51:30,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541853177] [2023-08-26 19:51:30,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:30,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 19:51:30,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:30,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 19:51:30,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-08-26 19:51:30,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 273 [2023-08-26 19:51:30,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 619 flow. Second operand has 24 states, 24 states have (on average 87.41666666666667) internal successors, (2098), 24 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:30,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:30,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 273 [2023-08-26 19:51:30,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:35,752 INFO L124 PetriNetUnfolderBase]: 4350/6461 cut-off events. [2023-08-26 19:51:35,752 INFO L125 PetriNetUnfolderBase]: For 57468/57468 co-relation queries the response was YES. [2023-08-26 19:51:35,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38961 conditions, 6461 events. 4350/6461 cut-off events. For 57468/57468 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 34606 event pairs, 24 based on Foata normal form. 80/6003 useless extension candidates. Maximal degree in co-relation 38937. Up to 2579 conditions per place. [2023-08-26 19:51:35,833 INFO L140 encePairwiseOnDemand]: 265/273 looper letters, 386 selfloop transitions, 632 changer transitions 48/1066 dead transitions. [2023-08-26 19:51:35,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 1066 transitions, 9641 flow [2023-08-26 19:51:35,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-26 19:51:35,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-26 19:51:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 5822 transitions. [2023-08-26 19:51:35,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34396786009689234 [2023-08-26 19:51:35,851 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 5822 transitions. [2023-08-26 19:51:35,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 5822 transitions. [2023-08-26 19:51:35,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:35,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 5822 transitions. [2023-08-26 19:51:35,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 93.90322580645162) internal successors, (5822), 62 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:35,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 273.0) internal successors, (17199), 63 states have internal predecessors, (17199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:35,896 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 273.0) internal successors, (17199), 63 states have internal predecessors, (17199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:35,896 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 619 flow. Second operand 62 states and 5822 transitions. [2023-08-26 19:51:35,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 1066 transitions, 9641 flow [2023-08-26 19:51:36,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 1066 transitions, 8711 flow, removed 418 selfloop flow, removed 5 redundant places. [2023-08-26 19:51:36,094 INFO L231 Difference]: Finished difference. Result has 156 places, 758 transitions, 7660 flow [2023-08-26 19:51:36,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=7660, PETRI_PLACES=156, PETRI_TRANSITIONS=758} [2023-08-26 19:51:36,095 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 118 predicate places. [2023-08-26 19:51:36,095 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 758 transitions, 7660 flow [2023-08-26 19:51:36,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 87.41666666666667) internal successors, (2098), 24 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:36,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:36,096 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:36,108 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 19:51:36,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:36,303 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:36,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:36,303 INFO L85 PathProgramCache]: Analyzing trace with hash -584674138, now seen corresponding path program 5 times [2023-08-26 19:51:36,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:36,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198630745] [2023-08-26 19:51:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:36,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:37,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:37,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198630745] [2023-08-26 19:51:37,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198630745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:37,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087725194] [2023-08-26 19:51:37,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 19:51:37,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:37,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:37,273 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 19:51:37,295 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 19:51:37,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 19:51:37,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:37,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:51:37,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:37,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:38,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087725194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:38,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:38,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-08-26 19:51:38,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883976926] [2023-08-26 19:51:38,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:38,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 19:51:38,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:38,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 19:51:38,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2023-08-26 19:51:38,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 273 [2023-08-26 19:51:38,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 758 transitions, 7660 flow. Second operand has 25 states, 25 states have (on average 87.08) internal successors, (2177), 25 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:38,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:38,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 273 [2023-08-26 19:51:38,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:44,725 INFO L124 PetriNetUnfolderBase]: 8515/13079 cut-off events. [2023-08-26 19:51:44,725 INFO L125 PetriNetUnfolderBase]: For 102772/102772 co-relation queries the response was YES. [2023-08-26 19:51:44,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81407 conditions, 13079 events. 8515/13079 cut-off events. For 102772/102772 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 82069 event pairs, 6 based on Foata normal form. 62/12529 useless extension candidates. Maximal degree in co-relation 81368. Up to 5393 conditions per place. [2023-08-26 19:51:44,850 INFO L140 encePairwiseOnDemand]: 265/273 looper letters, 705 selfloop transitions, 1577 changer transitions 97/2379 dead transitions. [2023-08-26 19:51:44,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 2379 transitions, 28084 flow [2023-08-26 19:51:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-26 19:51:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-26 19:51:44,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 6737 transitions. [2023-08-26 19:51:44,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34274521774521777 [2023-08-26 19:51:44,859 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 6737 transitions. [2023-08-26 19:51:44,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 6737 transitions. [2023-08-26 19:51:44,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:44,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 6737 transitions. [2023-08-26 19:51:44,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 93.56944444444444) internal successors, (6737), 72 states have internal predecessors, (6737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:44,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 273.0) internal successors, (19929), 73 states have internal predecessors, (19929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:44,892 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 273.0) internal successors, (19929), 73 states have internal predecessors, (19929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:44,892 INFO L175 Difference]: Start difference. First operand has 156 places, 758 transitions, 7660 flow. Second operand 72 states and 6737 transitions. [2023-08-26 19:51:44,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 2379 transitions, 28084 flow [2023-08-26 19:51:46,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 2379 transitions, 22980 flow, removed 2546 selfloop flow, removed 4 redundant places. [2023-08-26 19:51:46,934 INFO L231 Difference]: Finished difference. Result has 244 places, 1953 transitions, 22529 flow [2023-08-26 19:51:46,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6260, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=573, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=22529, PETRI_PLACES=244, PETRI_TRANSITIONS=1953} [2023-08-26 19:51:46,936 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 206 predicate places. [2023-08-26 19:51:46,936 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 1953 transitions, 22529 flow [2023-08-26 19:51:46,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 87.08) internal successors, (2177), 25 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:46,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:46,936 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:46,942 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 19:51:47,139 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,SelfDestructingSolverStorable14 [2023-08-26 19:51:47,140 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:47,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:47,140 INFO L85 PathProgramCache]: Analyzing trace with hash 436828428, now seen corresponding path program 6 times [2023-08-26 19:51:47,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:47,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6081258] [2023-08-26 19:51:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:47,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:48,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:48,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6081258] [2023-08-26 19:51:48,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6081258] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:48,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683257666] [2023-08-26 19:51:48,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 19:51:48,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:48,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:48,117 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 19:51:48,134 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 19:51:48,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 19:51:48,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:48,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-26 19:51:48,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:48,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:49,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683257666] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:49,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:49,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 21 [2023-08-26 19:51:49,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582432901] [2023-08-26 19:51:49,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:49,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-26 19:51:49,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:49,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-26 19:51:49,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2023-08-26 19:51:49,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 273 [2023-08-26 19:51:49,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 1953 transitions, 22529 flow. Second operand has 23 states, 23 states have (on average 87.34782608695652) internal successors, (2009), 23 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:49,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:49,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 273 [2023-08-26 19:51:49,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:58,390 INFO L124 PetriNetUnfolderBase]: 13477/20407 cut-off events. [2023-08-26 19:51:58,391 INFO L125 PetriNetUnfolderBase]: For 110774/110774 co-relation queries the response was YES. [2023-08-26 19:51:58,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124004 conditions, 20407 events. 13477/20407 cut-off events. For 110774/110774 co-relation queries the response was YES. Maximal size of possible extension queue 1165. Compared 134499 event pairs, 228 based on Foata normal form. 14/20409 useless extension candidates. Maximal degree in co-relation 123943. Up to 6501 conditions per place. [2023-08-26 19:51:58,595 INFO L140 encePairwiseOnDemand]: 265/273 looper letters, 1107 selfloop transitions, 2736 changer transitions 157/4000 dead transitions. [2023-08-26 19:51:58,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 4000 transitions, 54088 flow [2023-08-26 19:51:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-26 19:51:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-26 19:51:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 5781 transitions. [2023-08-26 19:51:58,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3361241932670504 [2023-08-26 19:51:58,606 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 5781 transitions. [2023-08-26 19:51:58,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 5781 transitions. [2023-08-26 19:51:58,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:58,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 5781 transitions. [2023-08-26 19:51:58,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 91.76190476190476) internal successors, (5781), 63 states have internal predecessors, (5781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:58,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 273.0) internal successors, (17472), 64 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:58,636 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 273.0) internal successors, (17472), 64 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:58,636 INFO L175 Difference]: Start difference. First operand has 244 places, 1953 transitions, 22529 flow. Second operand 63 states and 5781 transitions. [2023-08-26 19:51:58,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 4000 transitions, 54088 flow [2023-08-26 19:52:05,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 4000 transitions, 52392 flow, removed 829 selfloop flow, removed 7 redundant places. [2023-08-26 19:52:05,165 INFO L231 Difference]: Finished difference. Result has 323 places, 3560 transitions, 51930 flow [2023-08-26 19:52:05,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=21752, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=51930, PETRI_PLACES=323, PETRI_TRANSITIONS=3560} [2023-08-26 19:52:05,167 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 285 predicate places. [2023-08-26 19:52:05,167 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 3560 transitions, 51930 flow [2023-08-26 19:52:05,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 87.34782608695652) internal successors, (2009), 23 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:05,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:05,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:05,176 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 19:52:05,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 19:52:05,376 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:52:05,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:05,377 INFO L85 PathProgramCache]: Analyzing trace with hash -641619230, now seen corresponding path program 7 times [2023-08-26 19:52:05,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:05,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280762449] [2023-08-26 19:52:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:05,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:06,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:06,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280762449] [2023-08-26 19:52:06,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280762449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:52:06,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640906193] [2023-08-26 19:52:06,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 19:52:06,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:06,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:52:06,113 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 19:52:06,115 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 19:52:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:06,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:52:06,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:52:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:06,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:52:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:07,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640906193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:52:07,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:52:07,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-08-26 19:52:07,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541174394] [2023-08-26 19:52:07,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:52:07,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 19:52:07,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:07,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 19:52:07,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2023-08-26 19:52:07,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 273 [2023-08-26 19:52:07,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 3560 transitions, 51930 flow. Second operand has 26 states, 26 states have (on average 87.23076923076923) internal successors, (2268), 26 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:07,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:07,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 273 [2023-08-26 19:52:07,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:36,463 INFO L124 PetriNetUnfolderBase]: 34834/51409 cut-off events. [2023-08-26 19:52:36,463 INFO L125 PetriNetUnfolderBase]: For 370150/370150 co-relation queries the response was YES. [2023-08-26 19:52:37,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367584 conditions, 51409 events. 34834/51409 cut-off events. For 370150/370150 co-relation queries the response was YES. Maximal size of possible extension queue 2790. Compared 367766 event pairs, 100 based on Foata normal form. 781/52178 useless extension candidates. Maximal degree in co-relation 367502. Up to 18507 conditions per place. [2023-08-26 19:52:37,841 INFO L140 encePairwiseOnDemand]: 265/273 looper letters, 1894 selfloop transitions, 7926 changer transitions 262/10082 dead transitions. [2023-08-26 19:52:37,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 10082 transitions, 165600 flow [2023-08-26 19:52:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-08-26 19:52:37,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-08-26 19:52:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 6536 transitions. [2023-08-26 19:52:37,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34697669480278176 [2023-08-26 19:52:37,852 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 6536 transitions. [2023-08-26 19:52:37,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 6536 transitions. [2023-08-26 19:52:37,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:37,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 6536 transitions. [2023-08-26 19:52:37,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 94.72463768115942) internal successors, (6536), 69 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:37,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 273.0) internal successors, (19110), 70 states have internal predecessors, (19110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:37,881 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 273.0) internal successors, (19110), 70 states have internal predecessors, (19110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:37,881 INFO L175 Difference]: Start difference. First operand has 323 places, 3560 transitions, 51930 flow. Second operand 69 states and 6536 transitions. [2023-08-26 19:52:37,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 10082 transitions, 165600 flow [2023-08-26 19:53:38,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 10082 transitions, 163178 flow, removed 1199 selfloop flow, removed 2 redundant places. [2023-08-26 19:53:38,323 INFO L231 Difference]: Finished difference. Result has 429 places, 9359 transitions, 167102 flow [2023-08-26 19:53:38,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=50350, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2865, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=167102, PETRI_PLACES=429, PETRI_TRANSITIONS=9359} [2023-08-26 19:53:38,326 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 391 predicate places. [2023-08-26 19:53:38,326 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 9359 transitions, 167102 flow [2023-08-26 19:53:38,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 87.23076923076923) internal successors, (2268), 26 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:38,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:38,326 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:38,333 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 19:53:38,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:53:38,533 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:53:38,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:38,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1640369718, now seen corresponding path program 8 times [2023-08-26 19:53:38,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:38,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916961211] [2023-08-26 19:53:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:38,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:53:39,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:39,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916961211] [2023-08-26 19:53:39,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916961211] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:53:39,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662895352] [2023-08-26 19:53:39,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:53:39,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:53:39,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:53:39,428 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 19:53:39,431 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 19:53:39,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:53:39,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:53:39,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:53:39,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:53:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:53:39,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:53:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:53:40,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662895352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:53:40,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:53:40,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-08-26 19:53:40,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687297662] [2023-08-26 19:53:40,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:53:40,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-26 19:53:40,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:40,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-26 19:53:40,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2023-08-26 19:53:40,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 273 [2023-08-26 19:53:40,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 9359 transitions, 167102 flow. Second operand has 28 states, 28 states have (on average 87.21428571428571) internal successors, (2442), 28 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:40,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:40,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 273 [2023-08-26 19:53:40,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:55:34,042 INFO L124 PetriNetUnfolderBase]: 55910/81155 cut-off events. [2023-08-26 19:55:34,043 INFO L125 PetriNetUnfolderBase]: For 793989/793989 co-relation queries the response was YES. [2023-08-26 19:55:36,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697135 conditions, 81155 events. 55910/81155 cut-off events. For 793989/793989 co-relation queries the response was YES. Maximal size of possible extension queue 4315. Compared 595668 event pairs, 108 based on Foata normal form. 200/81355 useless extension candidates. Maximal degree in co-relation 697014. Up to 31423 conditions per place. [2023-08-26 19:55:37,259 INFO L140 encePairwiseOnDemand]: 265/273 looper letters, 4354 selfloop transitions, 12843 changer transitions 211/17408 dead transitions. [2023-08-26 19:55:37,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 17408 transitions, 344928 flow [2023-08-26 19:55:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-08-26 19:55:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2023-08-26 19:55:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 8297 transitions. [2023-08-26 19:55:37,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3414824875499033 [2023-08-26 19:55:37,408 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 8297 transitions. [2023-08-26 19:55:37,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 8297 transitions. [2023-08-26 19:55:37,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:55:37,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 8297 transitions. [2023-08-26 19:55:37,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 93.2247191011236) internal successors, (8297), 89 states have internal predecessors, (8297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:55:37,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 273.0) internal successors, (24570), 90 states have internal predecessors, (24570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:55:37,443 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 273.0) internal successors, (24570), 90 states have internal predecessors, (24570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:55:37,444 INFO L175 Difference]: Start difference. First operand has 429 places, 9359 transitions, 167102 flow. Second operand 89 states and 8297 transitions. [2023-08-26 19:55:37,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 17408 transitions, 344928 flow [2023-08-26 20:00:26,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 17408 transitions, 335742 flow, removed 4453 selfloop flow, removed 5 redundant places. [2023-08-26 20:00:26,608 INFO L231 Difference]: Finished difference. Result has 561 places, 16675 transitions, 347508 flow [2023-08-26 20:00:26,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=161989, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1979, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=347508, PETRI_PLACES=561, PETRI_TRANSITIONS=16675} [2023-08-26 20:00:26,616 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 523 predicate places. [2023-08-26 20:00:26,616 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 16675 transitions, 347508 flow [2023-08-26 20:00:26,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 87.21428571428571) internal successors, (2442), 28 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:00:26,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:00:26,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:00:26,622 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 20:00:26,821 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,SelfDestructingSolverStorable17 [2023-08-26 20:00:26,822 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 20:00:26,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:00:26,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1171462640, now seen corresponding path program 9 times [2023-08-26 20:00:26,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:00:26,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725171346] [2023-08-26 20:00:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:00:26,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:00:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:00:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:00:27,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:00:27,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725171346] [2023-08-26 20:00:27,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725171346] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:00:27,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59016510] [2023-08-26 20:00:27,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 20:00:27,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:00:27,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:00:27,544 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 20:00:27,569 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 20:00:27,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 20:00:27,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:00:27,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 20:00:27,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:00:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:00:27,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:00:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:00:28,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59016510] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:00:28,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:00:28,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 23 [2023-08-26 20:00:28,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625901717] [2023-08-26 20:00:28,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:00:28,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 20:00:28,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:00:28,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 20:00:28,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2023-08-26 20:00:28,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 273 [2023-08-26 20:00:28,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 16675 transitions, 347508 flow. Second operand has 25 states, 25 states have (on average 87.48) internal successors, (2187), 25 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:00:28,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:00:28,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 273 [2023-08-26 20:00:28,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-26 20:05:05,749 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 20:05:05,749 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 20:05:06,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 20:05:06,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2023-08-26 20:05:09,551 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12ASSERT_VIOLATIONASSERT (15 of 16 remaining) [2023-08-26 20:05:09,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 20:05:09,552 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-26 20:05:09,553 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-08-26 20:05:09,554 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-08-26 20:05:09,554 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-08-26 20:05:09,554 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-08-26 20:05:09,554 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-08-26 20:05:09,554 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-08-26 20:05:09,554 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2023-08-26 20:05:09,554 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-08-26 20:05:09,554 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-08-26 20:05:09,556 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-08-26 20:05:09,556 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-08-26 20:05:09,556 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-08-26 20:05:09,556 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 16 remaining) [2023-08-26 20:05:09,567 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 16 remaining) [2023-08-26 20:05:09,568 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 16 remaining) [2023-08-26 20:05:09,568 INFO L445 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:09,588 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 20:05:09,588 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 20:05:09,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 08:05:09 BasicIcfg [2023-08-26 20:05:09,590 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 20:05:09,591 INFO L158 Benchmark]: Toolchain (without parser) took 832153.69ms. Allocated memory was 400.6MB in the beginning and 7.1GB in the end (delta: 6.7GB). Free memory was 376.1MB in the beginning and 4.4GB in the end (delta: -4.0GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. [2023-08-26 20:05:09,591 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 400.6MB. Free memory was 376.5MB in the beginning and 376.3MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 20:05:09,591 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.12ms. Allocated memory is still 400.6MB. Free memory was 376.1MB in the beginning and 365.0MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 20:05:09,591 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.33ms. Allocated memory is still 400.6MB. Free memory was 365.0MB in the beginning and 362.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:05:09,591 INFO L158 Benchmark]: Boogie Preprocessor took 38.33ms. Allocated memory is still 400.6MB. Free memory was 362.9MB in the beginning and 361.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 20:05:09,592 INFO L158 Benchmark]: RCFGBuilder took 514.95ms. Allocated memory is still 400.6MB. Free memory was 361.8MB in the beginning and 344.5MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 20:05:09,593 INFO L158 Benchmark]: TraceAbstraction took 831286.41ms. Allocated memory was 400.6MB in the beginning and 7.1GB in the end (delta: 6.7GB). Free memory was 343.5MB in the beginning and 4.4GB in the end (delta: -4.1GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. [2023-08-26 20:05:09,595 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 400.6MB. Free memory was 376.5MB in the beginning and 376.3MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 266.12ms. Allocated memory is still 400.6MB. Free memory was 376.1MB in the beginning and 365.0MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 41.33ms. Allocated memory is still 400.6MB. Free memory was 365.0MB in the beginning and 362.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 38.33ms. Allocated memory is still 400.6MB. Free memory was 362.9MB in the beginning and 361.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 514.95ms. Allocated memory is still 400.6MB. Free memory was 361.8MB in the beginning and 344.5MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 831286.41ms. Allocated memory was 400.6MB in the beginning and 7.1GB in the end (delta: 6.7GB). Free memory was 343.5MB in the beginning and 4.4GB in the end (delta: -4.1GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.5s, 120 PlacesBefore, 38 PlacesAfterwards, 126 TransitionsBefore, 31 TransitionsAfterwards, 3888 CoEnabledTransitionPairs, 6 FixpointIterations, 44 TrivialSequentialCompositions, 65 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 8 ConcurrentYvCompositions, 13 ChoiceCompositions, 133 TotalNumberOfCompositions, 3698 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3534, independent: 3526, independent conditional: 0, independent unconditional: 3526, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1961, independent: 1954, independent conditional: 0, independent unconditional: 1954, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3534, independent: 1572, independent conditional: 0, independent unconditional: 1572, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 1961, unknown conditional: 0, unknown unconditional: 1961] , Statistics on independence cache: Total cache size (in pairs): 51, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 119]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 170 locations, 16 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 831.1s, OverallIterations: 19, TraceHistogramMax: 2, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 809.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3547 SdHoareTripleChecker+Valid, 6.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3547 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 5.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 971 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8110 IncrementalHoareTripleChecker+Invalid, 9081 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 971 mSolverCounterUnsat, 0 mSDtfsCounter, 8110 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 864 GetRequests, 256 SyntacticMatches, 18 SemanticMatches, 590 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18646 ImplicationChecksByTransitivity, 27.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=347508occurred in iteration=18, InterpolantAutomatonStates: 423, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 13.2s InterpolantComputationTime, 466 NumberOfCodeBlocks, 466 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 621 ConstructedInterpolants, 0 QuantifiedInterpolants, 8159 SizeOfPredicates, 70 NumberOfNonLiveVariables, 1659 ConjunctsInSsa, 174 ConjunctsInUnsatCore, 37 InterpolantComputations, 10 PerfectInterpolantSequences, 43/210 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown