/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/parallel-ticket-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 19:52:31,812 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 19:52:31,893 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 19:52:31,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 19:52:31,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 19:52:31,931 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 19:52:31,932 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 19:52:31,932 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 19:52:31,933 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 19:52:31,933 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 19:52:31,933 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 19:52:31,934 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 19:52:31,934 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 19:52:31,934 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 19:52:31,935 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 19:52:31,935 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 19:52:31,935 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 19:52:31,936 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 19:52:31,936 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 19:52:31,936 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 19:52:31,937 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 19:52:31,937 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 19:52:31,937 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 19:52:31,937 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 19:52:31,938 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 19:52:31,938 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 19:52:31,938 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 19:52:31,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:52:31,939 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 19:52:31,939 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 19:52:31,939 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 19:52:31,940 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 19:52:31,940 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 19:52:31,940 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 19:52:31,940 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 19:52:31,941 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 19:52:32,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 19:52:32,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 19:52:32,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 19:52:32,301 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 19:52:32,301 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 19:52:32,303 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-ticket-4.wvr.c [2023-08-26 19:52:33,573 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 19:52:33,785 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 19:52:33,786 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-4.wvr.c [2023-08-26 19:52:33,792 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae3ddce1f/c8ca0791cfe44e2c9a7091ee5c6c3462/FLAGb3e164779 [2023-08-26 19:52:33,807 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae3ddce1f/c8ca0791cfe44e2c9a7091ee5c6c3462 [2023-08-26 19:52:33,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 19:52:33,811 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 19:52:33,812 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 19:52:33,812 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 19:52:33,815 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 19:52:33,815 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:52:33" (1/1) ... [2023-08-26 19:52:33,816 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a5a4253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:33, skipping insertion in model container [2023-08-26 19:52:33,817 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:52:33" (1/1) ... [2023-08-26 19:52:33,847 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 19:52:33,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:52:33,999 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 19:52:34,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:52:34,028 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 19:52:34,029 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 19:52:34,034 INFO L206 MainTranslator]: Completed translation [2023-08-26 19:52:34,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:34 WrapperNode [2023-08-26 19:52:34,035 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 19:52:34,036 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 19:52:34,036 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 19:52:34,036 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 19:52:34,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:34" (1/1) ... [2023-08-26 19:52:34,062 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:34" (1/1) ... [2023-08-26 19:52:34,097 INFO L138 Inliner]: procedures = 23, calls = 71, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 208 [2023-08-26 19:52:34,098 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 19:52:34,099 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 19:52:34,100 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 19:52:34,100 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 19:52:34,107 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:34" (1/1) ... [2023-08-26 19:52:34,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:34" (1/1) ... [2023-08-26 19:52:34,120 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:34" (1/1) ... [2023-08-26 19:52:34,121 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:34" (1/1) ... [2023-08-26 19:52:34,129 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:34" (1/1) ... [2023-08-26 19:52:34,130 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:34" (1/1) ... [2023-08-26 19:52:34,132 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:34" (1/1) ... [2023-08-26 19:52:34,133 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:34" (1/1) ... [2023-08-26 19:52:34,135 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 19:52:34,136 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 19:52:34,136 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 19:52:34,136 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 19:52:34,149 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:34" (1/1) ... [2023-08-26 19:52:34,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:52:34,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:52:34,182 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 19:52:34,205 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 19:52:34,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 19:52:34,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 19:52:34,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 19:52:34,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 19:52:34,222 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 19:52:34,222 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 19:52:34,222 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 19:52:34,222 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-26 19:52:34,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-26 19:52:34,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 19:52:34,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 19:52:34,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 19:52:34,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 19:52:34,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 19:52:34,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 19:52:34,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 19:52:34,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 19:52:34,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 19:52:34,226 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 19:52:34,350 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 19:52:34,352 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 19:52:34,728 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 19:52:34,811 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 19:52:34,812 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 19:52:34,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:52:34 BoogieIcfgContainer [2023-08-26 19:52:34,816 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 19:52:34,819 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 19:52:34,819 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 19:52:34,822 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 19:52:34,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:52:33" (1/3) ... [2023-08-26 19:52:34,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3231a71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:52:34, skipping insertion in model container [2023-08-26 19:52:34,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:34" (2/3) ... [2023-08-26 19:52:34,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3231a71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:52:34, skipping insertion in model container [2023-08-26 19:52:34,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:52:34" (3/3) ... [2023-08-26 19:52:34,826 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-4.wvr.c [2023-08-26 19:52:34,843 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 19:52:34,843 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-26 19:52:34,843 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 19:52:34,930 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 19:52:34,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 160 transitions, 352 flow [2023-08-26 19:52:35,055 INFO L124 PetriNetUnfolderBase]: 2/156 cut-off events. [2023-08-26 19:52:35,055 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 19:52:35,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 156 events. 2/156 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 110 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-08-26 19:52:35,060 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 160 transitions, 352 flow [2023-08-26 19:52:35,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 143 transitions, 310 flow [2023-08-26 19:52:35,071 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 19:52:35,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 143 transitions, 310 flow [2023-08-26 19:52:35,084 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 143 transitions, 310 flow [2023-08-26 19:52:35,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 143 transitions, 310 flow [2023-08-26 19:52:35,134 INFO L124 PetriNetUnfolderBase]: 2/143 cut-off events. [2023-08-26 19:52:35,134 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 19:52:35,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 143 events. 2/143 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 109 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-08-26 19:52:35,136 INFO L119 LiptonReduction]: Number of co-enabled transitions 1702 [2023-08-26 19:52:40,698 INFO L134 LiptonReduction]: Checked pairs total: 8882 [2023-08-26 19:52:40,698 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-08-26 19:52:40,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 19:52:40,717 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;@65623ae2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 19:52:40,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-26 19:52:40,718 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 19:52:40,719 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 19:52:40,719 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:52:40,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:40,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 19:52:40,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:40,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:40,725 INFO L85 PathProgramCache]: Analyzing trace with hash 624, now seen corresponding path program 1 times [2023-08-26 19:52:40,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:40,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240992744] [2023-08-26 19:52:40,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:40,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:40,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:40,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240992744] [2023-08-26 19:52:40,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240992744] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:40,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:40,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 19:52:40,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563583400] [2023-08-26 19:52:40,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:40,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 19:52:40,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:40,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 19:52:40,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 19:52:40,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 290 [2023-08-26 19:52:40,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 124 flow. Second operand has 2 states, 2 states have (on average 137.5) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:40,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:40,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 290 [2023-08-26 19:52:40,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:41,417 INFO L124 PetriNetUnfolderBase]: 4185/6232 cut-off events. [2023-08-26 19:52:41,418 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2023-08-26 19:52:41,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12377 conditions, 6232 events. 4185/6232 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35356 event pairs, 4185 based on Foata normal form. 0/5347 useless extension candidates. Maximal degree in co-relation 10236. Up to 5885 conditions per place. [2023-08-26 19:52:41,461 INFO L140 encePairwiseOnDemand]: 288/290 looper letters, 43 selfloop transitions, 0 changer transitions 0/48 dead transitions. [2023-08-26 19:52:41,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 48 transitions, 206 flow [2023-08-26 19:52:41,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 19:52:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 19:52:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 319 transitions. [2023-08-26 19:52:41,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-08-26 19:52:41,476 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 319 transitions. [2023-08-26 19:52:41,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 319 transitions. [2023-08-26 19:52:41,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:41,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 319 transitions. [2023-08-26 19:52:41,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:41,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 290.0) internal successors, (870), 3 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:41,488 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 290.0) internal successors, (870), 3 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:41,490 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 124 flow. Second operand 2 states and 319 transitions. [2023-08-26 19:52:41,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 48 transitions, 206 flow [2023-08-26 19:52:41,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 48 transitions, 190 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-26 19:52:41,499 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 104 flow [2023-08-26 19:52:41,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-26 19:52:41,504 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-08-26 19:52:41,504 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 104 flow [2023-08-26 19:52:41,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 137.5) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:41,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:41,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:52:41,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 19:52:41,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:41,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:41,514 INFO L85 PathProgramCache]: Analyzing trace with hash 612475, now seen corresponding path program 1 times [2023-08-26 19:52:41,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:41,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630303454] [2023-08-26 19:52:41,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:41,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:41,969 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 19:52:41,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:41,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630303454] [2023-08-26 19:52:41,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630303454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:41,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:41,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:52:41,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436233785] [2023-08-26 19:52:41,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:41,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:52:41,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:41,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:52:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:52:41,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 290 [2023-08-26 19:52:41,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:41,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:41,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 290 [2023-08-26 19:52:41,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:42,397 INFO L124 PetriNetUnfolderBase]: 4038/6015 cut-off events. [2023-08-26 19:52:42,397 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 19:52:42,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11772 conditions, 6015 events. 4038/6015 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34065 event pairs, 4038 based on Foata normal form. 0/5198 useless extension candidates. Maximal degree in co-relation 11769. Up to 5669 conditions per place. [2023-08-26 19:52:42,431 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 40 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-26 19:52:42,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 182 flow [2023-08-26 19:52:42,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:52:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:52:42,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 361 transitions. [2023-08-26 19:52:42,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4149425287356322 [2023-08-26 19:52:42,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 361 transitions. [2023-08-26 19:52:42,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 361 transitions. [2023-08-26 19:52:42,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:42,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 361 transitions. [2023-08-26 19:52:42,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:42,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:42,444 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:42,445 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 104 flow. Second operand 3 states and 361 transitions. [2023-08-26 19:52:42,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 182 flow [2023-08-26 19:52:42,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:52:42,449 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 102 flow [2023-08-26 19:52:42,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-08-26 19:52:42,450 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-08-26 19:52:42,450 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 102 flow [2023-08-26 19:52:42,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:42,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:42,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:52:42,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 19:52:42,456 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:42,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:42,458 INFO L85 PathProgramCache]: Analyzing trace with hash 612474, now seen corresponding path program 1 times [2023-08-26 19:52:42,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:42,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711814043] [2023-08-26 19:52:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:42,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:42,612 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 19:52:42,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:42,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711814043] [2023-08-26 19:52:42,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711814043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:42,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:42,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:52:42,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875438824] [2023-08-26 19:52:42,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:42,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:52:42,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:42,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:52:42,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:52:42,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 290 [2023-08-26 19:52:42,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:42,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:42,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 290 [2023-08-26 19:52:42,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:42,997 INFO L124 PetriNetUnfolderBase]: 3891/5798 cut-off events. [2023-08-26 19:52:42,997 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 19:52:43,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11342 conditions, 5798 events. 3891/5798 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32746 event pairs, 3891 based on Foata normal form. 0/5049 useless extension candidates. Maximal degree in co-relation 11338. Up to 5454 conditions per place. [2023-08-26 19:52:43,034 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 38 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-26 19:52:43,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 44 transitions, 176 flow [2023-08-26 19:52:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:52:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:52:43,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-26 19:52:43,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264367816091954 [2023-08-26 19:52:43,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-26 19:52:43,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-26 19:52:43,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:43,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-26 19:52:43,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:43,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:43,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:43,041 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 102 flow. Second operand 3 states and 371 transitions. [2023-08-26 19:52:43,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 44 transitions, 176 flow [2023-08-26 19:52:43,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:52:43,043 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 99 flow [2023-08-26 19:52:43,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-08-26 19:52:43,045 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2023-08-26 19:52:43,045 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 99 flow [2023-08-26 19:52:43,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:43,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:43,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:52:43,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 19:52:43,049 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:43,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:43,050 INFO L85 PathProgramCache]: Analyzing trace with hash 588601158, now seen corresponding path program 1 times [2023-08-26 19:52:43,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:43,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181716] [2023-08-26 19:52:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:43,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:43,141 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 19:52:43,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:43,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181716] [2023-08-26 19:52:43,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181716] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:43,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:43,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:52:43,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738024739] [2023-08-26 19:52:43,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:43,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:52:43,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:43,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:52:43,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:52:43,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 290 [2023-08-26 19:52:43,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 99 flow. Second operand has 3 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 19:52:43,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:43,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 290 [2023-08-26 19:52:43,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:43,512 INFO L124 PetriNetUnfolderBase]: 3843/5714 cut-off events. [2023-08-26 19:52:43,513 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 19:52:43,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11179 conditions, 5714 events. 3843/5714 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32278 event pairs, 3843 based on Foata normal form. 0/4998 useless extension candidates. Maximal degree in co-relation 11175. Up to 5374 conditions per place. [2023-08-26 19:52:43,546 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 36 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-26 19:52:43,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 169 flow [2023-08-26 19:52:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:52:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:52:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-26 19:52:43,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241379310344828 [2023-08-26 19:52:43,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-26 19:52:43,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-26 19:52:43,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:43,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-26 19:52:43,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:43,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:43,552 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:43,552 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 99 flow. Second operand 3 states and 369 transitions. [2023-08-26 19:52:43,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 169 flow [2023-08-26 19:52:43,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:52:43,555 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 96 flow [2023-08-26 19:52:43,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-26 19:52:43,556 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -11 predicate places. [2023-08-26 19:52:43,557 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 96 flow [2023-08-26 19:52:43,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 19:52:43,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:43,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:52:43,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 19:52:43,557 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:43,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:43,558 INFO L85 PathProgramCache]: Analyzing trace with hash 588601157, now seen corresponding path program 1 times [2023-08-26 19:52:43,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:43,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449374109] [2023-08-26 19:52:43,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:43,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:43,633 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 19:52:43,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:43,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449374109] [2023-08-26 19:52:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449374109] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:43,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:43,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:52:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451873454] [2023-08-26 19:52:43,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:43,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:52:43,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:43,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:52:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:52:43,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 290 [2023-08-26 19:52:43,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:43,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:43,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 290 [2023-08-26 19:52:43,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:43,984 INFO L124 PetriNetUnfolderBase]: 3795/5630 cut-off events. [2023-08-26 19:52:43,984 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 19:52:43,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11016 conditions, 5630 events. 3795/5630 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 31757 event pairs, 3795 based on Foata normal form. 0/4947 useless extension candidates. Maximal degree in co-relation 11012. Up to 5294 conditions per place. [2023-08-26 19:52:44,021 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 34 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-26 19:52:44,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 162 flow [2023-08-26 19:52:44,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:52:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:52:44,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-08-26 19:52:44,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40804597701149425 [2023-08-26 19:52:44,024 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-08-26 19:52:44,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-08-26 19:52:44,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:44,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-08-26 19:52:44,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,028 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 96 flow. Second operand 3 states and 355 transitions. [2023-08-26 19:52:44,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 162 flow [2023-08-26 19:52:44,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 40 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:52:44,030 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 93 flow [2023-08-26 19:52:44,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-26 19:52:44,032 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -12 predicate places. [2023-08-26 19:52:44,032 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 93 flow [2023-08-26 19:52:44,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:44,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:44,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 19:52:44,033 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:44,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:44,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1289957359, now seen corresponding path program 1 times [2023-08-26 19:52:44,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:44,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714394242] [2023-08-26 19:52:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:44,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:44,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:44,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714394242] [2023-08-26 19:52:44,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714394242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:44,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:44,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:52:44,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901185362] [2023-08-26 19:52:44,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:44,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:52:44,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:44,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:52:44,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:52:44,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 290 [2023-08-26 19:52:44,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:44,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 290 [2023-08-26 19:52:44,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:44,419 INFO L124 PetriNetUnfolderBase]: 3648/5399 cut-off events. [2023-08-26 19:52:44,419 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 19:52:44,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10571 conditions, 5399 events. 3648/5399 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 30155 event pairs, 3648 based on Foata normal form. 0/4788 useless extension candidates. Maximal degree in co-relation 10567. Up to 5079 conditions per place. [2023-08-26 19:52:44,449 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 32 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-26 19:52:44,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 155 flow [2023-08-26 19:52:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:52:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:52:44,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-26 19:52:44,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41954022988505746 [2023-08-26 19:52:44,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-26 19:52:44,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-26 19:52:44,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:44,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-26 19:52:44,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,455 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 93 flow. Second operand 3 states and 365 transitions. [2023-08-26 19:52:44,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 155 flow [2023-08-26 19:52:44,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 38 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:52:44,457 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 90 flow [2023-08-26 19:52:44,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2023-08-26 19:52:44,460 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -13 predicate places. [2023-08-26 19:52:44,460 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 90 flow [2023-08-26 19:52:44,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:44,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:44,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 19:52:44,461 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:44,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:44,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1289957357, now seen corresponding path program 1 times [2023-08-26 19:52:44,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:44,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416134522] [2023-08-26 19:52:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:44,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:44,505 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 19:52:44,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:44,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416134522] [2023-08-26 19:52:44,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416134522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:44,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:44,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:52:44,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150328625] [2023-08-26 19:52:44,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:44,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:52:44,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:44,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:52:44,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:52:44,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 290 [2023-08-26 19:52:44,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:44,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 290 [2023-08-26 19:52:44,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:44,852 INFO L124 PetriNetUnfolderBase]: 3501/5168 cut-off events. [2023-08-26 19:52:44,853 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 19:52:44,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10126 conditions, 5168 events. 3501/5168 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 28588 event pairs, 3501 based on Foata normal form. 0/4629 useless extension candidates. Maximal degree in co-relation 10122. Up to 4864 conditions per place. [2023-08-26 19:52:44,877 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 30 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-26 19:52:44,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 36 transitions, 148 flow [2023-08-26 19:52:44,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:52:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:52:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-08-26 19:52:44,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40344827586206894 [2023-08-26 19:52:44,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-08-26 19:52:44,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-08-26 19:52:44,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:44,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-08-26 19:52:44,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,883 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,883 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 90 flow. Second operand 3 states and 351 transitions. [2023-08-26 19:52:44,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 36 transitions, 148 flow [2023-08-26 19:52:44,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 36 transitions, 147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:52:44,884 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 87 flow [2023-08-26 19:52:44,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-08-26 19:52:44,886 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -14 predicate places. [2023-08-26 19:52:44,886 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 87 flow [2023-08-26 19:52:44,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:44,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:44,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 19:52:44,886 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:44,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:44,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1596542139, now seen corresponding path program 1 times [2023-08-26 19:52:44,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:44,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472259563] [2023-08-26 19:52:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:44,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:44,938 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 19:52:44,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:44,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472259563] [2023-08-26 19:52:44,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472259563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:44,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:44,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:52:44,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547190983] [2023-08-26 19:52:44,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:44,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:52:44,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:44,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:52:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:52:44,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 290 [2023-08-26 19:52:44,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:44,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:44,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 290 [2023-08-26 19:52:44,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:45,172 INFO L124 PetriNetUnfolderBase]: 2733/4080 cut-off events. [2023-08-26 19:52:45,172 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 19:52:45,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8015 conditions, 4080 events. 2733/4080 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 21953 event pairs, 2733 based on Foata normal form. 0/3797 useless extension candidates. Maximal degree in co-relation 8011. Up to 3840 conditions per place. [2023-08-26 19:52:45,194 INFO L140 encePairwiseOnDemand]: 288/290 looper letters, 29 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-26 19:52:45,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 35 transitions, 145 flow [2023-08-26 19:52:45,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:52:45,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:52:45,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 361 transitions. [2023-08-26 19:52:45,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4149425287356322 [2023-08-26 19:52:45,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 361 transitions. [2023-08-26 19:52:45,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 361 transitions. [2023-08-26 19:52:45,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:45,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 361 transitions. [2023-08-26 19:52:45,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:45,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:45,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:45,199 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 87 flow. Second operand 3 states and 361 transitions. [2023-08-26 19:52:45,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 35 transitions, 145 flow [2023-08-26 19:52:45,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 35 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:52:45,200 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 86 flow [2023-08-26 19:52:45,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2023-08-26 19:52:45,201 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -14 predicate places. [2023-08-26 19:52:45,201 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 86 flow [2023-08-26 19:52:45,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:45,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:45,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:45,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 19:52:45,201 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:45,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:45,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1596542137, now seen corresponding path program 1 times [2023-08-26 19:52:45,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:45,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792169915] [2023-08-26 19:52:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:45,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:45,350 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 19:52:45,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:45,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792169915] [2023-08-26 19:52:45,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792169915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:45,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:45,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:52:45,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405456139] [2023-08-26 19:52:45,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:45,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:52:45,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:52:45,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:52:45,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 290 [2023-08-26 19:52:45,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:45,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:45,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 290 [2023-08-26 19:52:45,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:45,546 INFO L124 PetriNetUnfolderBase]: 1965/2992 cut-off events. [2023-08-26 19:52:45,547 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 19:52:45,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5904 conditions, 2992 events. 1965/2992 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15514 event pairs, 1965 based on Foata normal form. 0/2965 useless extension candidates. Maximal degree in co-relation 5900. Up to 2816 conditions per place. [2023-08-26 19:52:45,561 INFO L140 encePairwiseOnDemand]: 288/290 looper letters, 28 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-26 19:52:45,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 34 transitions, 142 flow [2023-08-26 19:52:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:52:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:52:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-08-26 19:52:45,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3689655172413793 [2023-08-26 19:52:45,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-08-26 19:52:45,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-08-26 19:52:45,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:45,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-08-26 19:52:45,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:45,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:45,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:45,565 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 86 flow. Second operand 3 states and 321 transitions. [2023-08-26 19:52:45,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 34 transitions, 142 flow [2023-08-26 19:52:45,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 34 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:52:45,566 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 85 flow [2023-08-26 19:52:45,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2023-08-26 19:52:45,567 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -14 predicate places. [2023-08-26 19:52:45,567 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 85 flow [2023-08-26 19:52:45,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:45,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:45,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:45,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 19:52:45,568 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:45,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:45,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1776782171, now seen corresponding path program 1 times [2023-08-26 19:52:45,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:45,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863420687] [2023-08-26 19:52:45,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:45,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:46,179 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 19:52:46,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:46,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863420687] [2023-08-26 19:52:46,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863420687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:46,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:46,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:52:46,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836821782] [2023-08-26 19:52:46,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:46,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:52:46,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:46,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:52:46,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:52:46,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 290 [2023-08-26 19:52:46,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 85 flow. Second operand has 6 states, 6 states have (on average 131.66666666666666) internal successors, (790), 6 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:46,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:46,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 290 [2023-08-26 19:52:46,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:46,910 INFO L124 PetriNetUnfolderBase]: 7775/10913 cut-off events. [2023-08-26 19:52:46,910 INFO L125 PetriNetUnfolderBase]: For 194/194 co-relation queries the response was YES. [2023-08-26 19:52:46,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22079 conditions, 10913 events. 7775/10913 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 53708 event pairs, 2164 based on Foata normal form. 1/10914 useless extension candidates. Maximal degree in co-relation 22075. Up to 5195 conditions per place. [2023-08-26 19:52:46,979 INFO L140 encePairwiseOnDemand]: 283/290 looper letters, 89 selfloop transitions, 12 changer transitions 13/114 dead transitions. [2023-08-26 19:52:46,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 114 transitions, 487 flow [2023-08-26 19:52:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 19:52:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 19:52:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 871 transitions. [2023-08-26 19:52:46,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5005747126436781 [2023-08-26 19:52:46,982 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 871 transitions. [2023-08-26 19:52:46,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 871 transitions. [2023-08-26 19:52:46,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:46,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 871 transitions. [2023-08-26 19:52:46,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 145.16666666666666) internal successors, (871), 6 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:46,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:46,986 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:46,987 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 85 flow. Second operand 6 states and 871 transitions. [2023-08-26 19:52:46,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 114 transitions, 487 flow [2023-08-26 19:52:46,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 114 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:52:46,989 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 164 flow [2023-08-26 19:52:46,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2023-08-26 19:52:46,989 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -7 predicate places. [2023-08-26 19:52:46,990 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 164 flow [2023-08-26 19:52:46,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 131.66666666666666) internal successors, (790), 6 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:46,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:46,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:46,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 19:52:46,990 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:46,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:46,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1665606325, now seen corresponding path program 2 times [2023-08-26 19:52:46,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:46,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359474590] [2023-08-26 19:52:46,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:46,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:47,219 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 19:52:47,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:47,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359474590] [2023-08-26 19:52:47,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359474590] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:47,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:47,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:52:47,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675257515] [2023-08-26 19:52:47,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:47,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:52:47,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:47,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:52:47,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:52:47,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:52:47,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 164 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:47,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:47,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:52:47,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:48,066 INFO L124 PetriNetUnfolderBase]: 4828/8104 cut-off events. [2023-08-26 19:52:48,066 INFO L125 PetriNetUnfolderBase]: For 691/719 co-relation queries the response was YES. [2023-08-26 19:52:48,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17001 conditions, 8104 events. 4828/8104 cut-off events. For 691/719 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 56029 event pairs, 556 based on Foata normal form. 32/7914 useless extension candidates. Maximal degree in co-relation 16994. Up to 2028 conditions per place. [2023-08-26 19:52:48,116 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 107 selfloop transitions, 47 changer transitions 0/172 dead transitions. [2023-08-26 19:52:48,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 172 transitions, 741 flow [2023-08-26 19:52:48,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 19:52:48,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 19:52:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1564 transitions. [2023-08-26 19:52:48,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490282131661442 [2023-08-26 19:52:48,120 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1564 transitions. [2023-08-26 19:52:48,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1564 transitions. [2023-08-26 19:52:48,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:48,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1564 transitions. [2023-08-26 19:52:48,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 142.1818181818182) internal successors, (1564), 11 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:48,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:48,129 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:48,129 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 164 flow. Second operand 11 states and 1564 transitions. [2023-08-26 19:52:48,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 172 transitions, 741 flow [2023-08-26 19:52:48,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 172 transitions, 735 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 19:52:48,139 INFO L231 Difference]: Finished difference. Result has 67 places, 98 transitions, 392 flow [2023-08-26 19:52:48,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=392, PETRI_PLACES=67, PETRI_TRANSITIONS=98} [2023-08-26 19:52:48,140 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2023-08-26 19:52:48,140 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 98 transitions, 392 flow [2023-08-26 19:52:48,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:48,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:48,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:48,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 19:52:48,141 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:48,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:48,141 INFO L85 PathProgramCache]: Analyzing trace with hash -876230877, now seen corresponding path program 3 times [2023-08-26 19:52:48,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:48,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310557865] [2023-08-26 19:52:48,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:48,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:48,378 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 19:52:48,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:48,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310557865] [2023-08-26 19:52:48,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310557865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:48,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:48,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 19:52:48,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359326196] [2023-08-26 19:52:48,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:48,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:52:48,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:48,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:52:48,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:52:48,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:52:48,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 98 transitions, 392 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:48,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:48,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:52:48,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:49,195 INFO L124 PetriNetUnfolderBase]: 4597/7596 cut-off events. [2023-08-26 19:52:49,196 INFO L125 PetriNetUnfolderBase]: For 3270/3742 co-relation queries the response was YES. [2023-08-26 19:52:49,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19752 conditions, 7596 events. 4597/7596 cut-off events. For 3270/3742 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 50527 event pairs, 726 based on Foata normal form. 264/7666 useless extension candidates. Maximal degree in co-relation 19743. Up to 5116 conditions per place. [2023-08-26 19:52:49,252 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 112 selfloop transitions, 47 changer transitions 0/177 dead transitions. [2023-08-26 19:52:49,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 177 transitions, 953 flow [2023-08-26 19:52:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 19:52:49,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 19:52:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1268 transitions. [2023-08-26 19:52:49,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48582375478927203 [2023-08-26 19:52:49,256 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1268 transitions. [2023-08-26 19:52:49,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1268 transitions. [2023-08-26 19:52:49,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:49,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1268 transitions. [2023-08-26 19:52:49,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 140.88888888888889) internal successors, (1268), 9 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:49,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:49,265 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:49,266 INFO L175 Difference]: Start difference. First operand has 67 places, 98 transitions, 392 flow. Second operand 9 states and 1268 transitions. [2023-08-26 19:52:49,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 177 transitions, 953 flow [2023-08-26 19:52:49,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 177 transitions, 953 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:52:49,285 INFO L231 Difference]: Finished difference. Result has 79 places, 120 transitions, 653 flow [2023-08-26 19:52:49,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=653, PETRI_PLACES=79, PETRI_TRANSITIONS=120} [2023-08-26 19:52:49,286 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 16 predicate places. [2023-08-26 19:52:49,286 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 120 transitions, 653 flow [2023-08-26 19:52:49,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:49,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:49,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:49,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 19:52:49,287 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:49,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:49,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1927123061, now seen corresponding path program 4 times [2023-08-26 19:52:49,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:49,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774720885] [2023-08-26 19:52:49,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:49,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:49,522 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 19:52:49,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:49,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774720885] [2023-08-26 19:52:49,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774720885] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:49,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:49,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 19:52:49,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819130173] [2023-08-26 19:52:49,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:49,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:52:49,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:49,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:52:49,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:52:49,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:52:49,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 120 transitions, 653 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:49,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:49,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:52:49,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:50,463 INFO L124 PetriNetUnfolderBase]: 5961/9982 cut-off events. [2023-08-26 19:52:50,464 INFO L125 PetriNetUnfolderBase]: For 12404/13318 co-relation queries the response was YES. [2023-08-26 19:52:50,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30609 conditions, 9982 events. 5961/9982 cut-off events. For 12404/13318 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 70901 event pairs, 934 based on Foata normal form. 412/10126 useless extension candidates. Maximal degree in co-relation 30595. Up to 3197 conditions per place. [2023-08-26 19:52:50,540 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 118 selfloop transitions, 87 changer transitions 0/223 dead transitions. [2023-08-26 19:52:50,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 223 transitions, 1482 flow [2023-08-26 19:52:50,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 19:52:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 19:52:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1284 transitions. [2023-08-26 19:52:50,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49195402298850577 [2023-08-26 19:52:50,545 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1284 transitions. [2023-08-26 19:52:50,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1284 transitions. [2023-08-26 19:52:50,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:50,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1284 transitions. [2023-08-26 19:52:50,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 142.66666666666666) internal successors, (1284), 9 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:50,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:50,551 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:50,551 INFO L175 Difference]: Start difference. First operand has 79 places, 120 transitions, 653 flow. Second operand 9 states and 1284 transitions. [2023-08-26 19:52:50,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 223 transitions, 1482 flow [2023-08-26 19:52:50,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 223 transitions, 1443 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-26 19:52:50,595 INFO L231 Difference]: Finished difference. Result has 86 places, 156 transitions, 1157 flow [2023-08-26 19:52:50,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1157, PETRI_PLACES=86, PETRI_TRANSITIONS=156} [2023-08-26 19:52:50,596 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 23 predicate places. [2023-08-26 19:52:50,596 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 156 transitions, 1157 flow [2023-08-26 19:52:50,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:50,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:50,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:50,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 19:52:50,597 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:50,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:50,598 INFO L85 PathProgramCache]: Analyzing trace with hash 286951713, now seen corresponding path program 5 times [2023-08-26 19:52:50,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:50,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279674304] [2023-08-26 19:52:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:50,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:50,812 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 19:52:50,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:50,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279674304] [2023-08-26 19:52:50,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279674304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:50,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:50,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 19:52:50,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336433916] [2023-08-26 19:52:50,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:50,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:52:50,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:50,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:52:50,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:52:50,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:52:50,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 156 transitions, 1157 flow. Second operand has 6 states, 6 states have (on average 132.83333333333334) internal successors, (797), 6 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:50,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:50,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:52:50,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:51,584 INFO L124 PetriNetUnfolderBase]: 5335/9023 cut-off events. [2023-08-26 19:52:51,584 INFO L125 PetriNetUnfolderBase]: For 19486/20874 co-relation queries the response was YES. [2023-08-26 19:52:51,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31830 conditions, 9023 events. 5335/9023 cut-off events. For 19486/20874 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 62991 event pairs, 1495 based on Foata normal form. 542/9376 useless extension candidates. Maximal degree in co-relation 31814. Up to 6499 conditions per place. [2023-08-26 19:52:51,644 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 123 selfloop transitions, 57 changer transitions 8/206 dead transitions. [2023-08-26 19:52:51,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 206 transitions, 1742 flow [2023-08-26 19:52:51,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 19:52:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 19:52:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 990 transitions. [2023-08-26 19:52:51,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876847290640394 [2023-08-26 19:52:51,648 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 990 transitions. [2023-08-26 19:52:51,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 990 transitions. [2023-08-26 19:52:51,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:51,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 990 transitions. [2023-08-26 19:52:51,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 141.42857142857142) internal successors, (990), 7 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:51,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:51,654 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:51,654 INFO L175 Difference]: Start difference. First operand has 86 places, 156 transitions, 1157 flow. Second operand 7 states and 990 transitions. [2023-08-26 19:52:51,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 206 transitions, 1742 flow [2023-08-26 19:52:51,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 206 transitions, 1705 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-26 19:52:51,693 INFO L231 Difference]: Finished difference. Result has 93 places, 156 transitions, 1303 flow [2023-08-26 19:52:51,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1303, PETRI_PLACES=93, PETRI_TRANSITIONS=156} [2023-08-26 19:52:51,694 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 30 predicate places. [2023-08-26 19:52:51,694 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 156 transitions, 1303 flow [2023-08-26 19:52:51,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 132.83333333333334) internal successors, (797), 6 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:51,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:51,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:51,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 19:52:51,695 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:51,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:51,695 INFO L85 PathProgramCache]: Analyzing trace with hash 599718469, now seen corresponding path program 6 times [2023-08-26 19:52:51,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:51,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840455697] [2023-08-26 19:52:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:51,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:51,917 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 19:52:51,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:51,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840455697] [2023-08-26 19:52:51,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840455697] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:51,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:51,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 19:52:51,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432697391] [2023-08-26 19:52:51,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:51,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:52:51,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:51,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:52:51,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:52:51,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:52:51,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 156 transitions, 1303 flow. Second operand has 6 states, 6 states have (on average 132.83333333333334) internal successors, (797), 6 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:51,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:51,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:52:51,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:52,575 INFO L124 PetriNetUnfolderBase]: 4692/8040 cut-off events. [2023-08-26 19:52:52,575 INFO L125 PetriNetUnfolderBase]: For 17715/18843 co-relation queries the response was YES. [2023-08-26 19:52:52,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28945 conditions, 8040 events. 4692/8040 cut-off events. For 17715/18843 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 56120 event pairs, 1383 based on Foata normal form. 398/8229 useless extension candidates. Maximal degree in co-relation 28925. Up to 6063 conditions per place. [2023-08-26 19:52:52,632 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 106 selfloop transitions, 48 changer transitions 18/190 dead transitions. [2023-08-26 19:52:52,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 190 transitions, 1727 flow [2023-08-26 19:52:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 19:52:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 19:52:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 980 transitions. [2023-08-26 19:52:52,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2023-08-26 19:52:52,635 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 980 transitions. [2023-08-26 19:52:52,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 980 transitions. [2023-08-26 19:52:52,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:52,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 980 transitions. [2023-08-26 19:52:52,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.0) internal successors, (980), 7 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:52,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:52,643 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:52,644 INFO L175 Difference]: Start difference. First operand has 93 places, 156 transitions, 1303 flow. Second operand 7 states and 980 transitions. [2023-08-26 19:52:52,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 190 transitions, 1727 flow [2023-08-26 19:52:52,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 190 transitions, 1676 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-26 19:52:52,672 INFO L231 Difference]: Finished difference. Result has 98 places, 145 transitions, 1304 flow [2023-08-26 19:52:52,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1304, PETRI_PLACES=98, PETRI_TRANSITIONS=145} [2023-08-26 19:52:52,673 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 35 predicate places. [2023-08-26 19:52:52,673 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 145 transitions, 1304 flow [2023-08-26 19:52:52,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 132.83333333333334) internal successors, (797), 6 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:52,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:52,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:52,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 19:52:52,674 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:52,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:52,674 INFO L85 PathProgramCache]: Analyzing trace with hash 244313207, now seen corresponding path program 7 times [2023-08-26 19:52:52,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:52,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512337728] [2023-08-26 19:52:52,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:52,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:52,841 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 19:52:52,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:52,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512337728] [2023-08-26 19:52:52,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512337728] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:52,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:52,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 19:52:52,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135912062] [2023-08-26 19:52:52,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:52,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:52:52,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:52,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:52:52,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:52:52,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:52:52,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 145 transitions, 1304 flow. Second operand has 6 states, 6 states have (on average 132.83333333333334) internal successors, (797), 6 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:52,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:52,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:52:52,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:53,538 INFO L124 PetriNetUnfolderBase]: 4118/7262 cut-off events. [2023-08-26 19:52:53,539 INFO L125 PetriNetUnfolderBase]: For 17669/18287 co-relation queries the response was YES. [2023-08-26 19:52:53,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26465 conditions, 7262 events. 4118/7262 cut-off events. For 17669/18287 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 51638 event pairs, 1346 based on Foata normal form. 176/7261 useless extension candidates. Maximal degree in co-relation 26443. Up to 5881 conditions per place. [2023-08-26 19:52:53,613 INFO L140 encePairwiseOnDemand]: 283/290 looper letters, 133 selfloop transitions, 20 changer transitions 0/170 dead transitions. [2023-08-26 19:52:53,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 170 transitions, 1726 flow [2023-08-26 19:52:53,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 19:52:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 19:52:53,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 697 transitions. [2023-08-26 19:52:53,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806896551724138 [2023-08-26 19:52:53,616 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 697 transitions. [2023-08-26 19:52:53,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 697 transitions. [2023-08-26 19:52:53,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:53,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 697 transitions. [2023-08-26 19:52:53,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.4) internal successors, (697), 5 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:53,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 290.0) internal successors, (1740), 6 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:53,621 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 290.0) internal successors, (1740), 6 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:53,621 INFO L175 Difference]: Start difference. First operand has 98 places, 145 transitions, 1304 flow. Second operand 5 states and 697 transitions. [2023-08-26 19:52:53,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 170 transitions, 1726 flow [2023-08-26 19:52:53,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 170 transitions, 1672 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-26 19:52:53,661 INFO L231 Difference]: Finished difference. Result has 88 places, 145 transitions, 1307 flow [2023-08-26 19:52:53,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1307, PETRI_PLACES=88, PETRI_TRANSITIONS=145} [2023-08-26 19:52:53,662 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-08-26 19:52:53,662 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 145 transitions, 1307 flow [2023-08-26 19:52:53,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 132.83333333333334) internal successors, (797), 6 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:53,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:53,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:53,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 19:52:53,663 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:53,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:53,663 INFO L85 PathProgramCache]: Analyzing trace with hash -359909413, now seen corresponding path program 8 times [2023-08-26 19:52:53,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:53,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423458137] [2023-08-26 19:52:53,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:53,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:53,846 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 19:52:53,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:53,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423458137] [2023-08-26 19:52:53,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423458137] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:53,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:53,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 19:52:53,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928418157] [2023-08-26 19:52:53,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:53,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:52:53,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:53,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:52:53,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:52:53,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:52:53,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 145 transitions, 1307 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:53,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:53,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:52:53,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:54,603 INFO L124 PetriNetUnfolderBase]: 4053/7215 cut-off events. [2023-08-26 19:52:54,603 INFO L125 PetriNetUnfolderBase]: For 15543/16570 co-relation queries the response was YES. [2023-08-26 19:52:54,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25524 conditions, 7215 events. 4053/7215 cut-off events. For 15543/16570 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 51807 event pairs, 705 based on Foata normal form. 586/7618 useless extension candidates. Maximal degree in co-relation 25503. Up to 2919 conditions per place. [2023-08-26 19:52:54,653 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 112 selfloop transitions, 88 changer transitions 1/218 dead transitions. [2023-08-26 19:52:54,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 218 transitions, 2053 flow [2023-08-26 19:52:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 19:52:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 19:52:54,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1271 transitions. [2023-08-26 19:52:54,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869731800766284 [2023-08-26 19:52:54,656 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1271 transitions. [2023-08-26 19:52:54,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1271 transitions. [2023-08-26 19:52:54,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:54,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1271 transitions. [2023-08-26 19:52:54,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 141.22222222222223) internal successors, (1271), 9 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:54,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:54,664 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:54,665 INFO L175 Difference]: Start difference. First operand has 88 places, 145 transitions, 1307 flow. Second operand 9 states and 1271 transitions. [2023-08-26 19:52:54,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 218 transitions, 2053 flow [2023-08-26 19:52:54,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 218 transitions, 2033 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:52:54,697 INFO L231 Difference]: Finished difference. Result has 95 places, 155 transitions, 1580 flow [2023-08-26 19:52:54,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1580, PETRI_PLACES=95, PETRI_TRANSITIONS=155} [2023-08-26 19:52:54,698 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 32 predicate places. [2023-08-26 19:52:54,698 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 155 transitions, 1580 flow [2023-08-26 19:52:54,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:54,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:54,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:54,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 19:52:54,699 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:54,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:54,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1430309173, now seen corresponding path program 9 times [2023-08-26 19:52:54,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:54,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77576217] [2023-08-26 19:52:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:54,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:54,951 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 19:52:54,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:54,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77576217] [2023-08-26 19:52:54,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77576217] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:54,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:54,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:52:54,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118816693] [2023-08-26 19:52:54,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:54,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:52:54,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:54,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:52:54,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:52:54,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:52:54,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 155 transitions, 1580 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:54,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:54,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:52:54,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:55,792 INFO L124 PetriNetUnfolderBase]: 4218/7543 cut-off events. [2023-08-26 19:52:55,792 INFO L125 PetriNetUnfolderBase]: For 24036/24924 co-relation queries the response was YES. [2023-08-26 19:52:55,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28951 conditions, 7543 events. 4218/7543 cut-off events. For 24036/24924 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 54790 event pairs, 1182 based on Foata normal form. 400/7765 useless extension candidates. Maximal degree in co-relation 28929. Up to 5547 conditions per place. [2023-08-26 19:52:55,898 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 147 selfloop transitions, 59 changer transitions 4/227 dead transitions. [2023-08-26 19:52:55,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 227 transitions, 2362 flow [2023-08-26 19:52:55,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 19:52:55,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 19:52:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1660 transitions. [2023-08-26 19:52:55,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47701149425287354 [2023-08-26 19:52:55,905 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1660 transitions. [2023-08-26 19:52:55,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1660 transitions. [2023-08-26 19:52:55,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:55,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1660 transitions. [2023-08-26 19:52:55,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 138.33333333333334) internal successors, (1660), 12 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:55,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:55,913 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:55,913 INFO L175 Difference]: Start difference. First operand has 95 places, 155 transitions, 1580 flow. Second operand 12 states and 1660 transitions. [2023-08-26 19:52:55,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 227 transitions, 2362 flow [2023-08-26 19:52:55,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 227 transitions, 2248 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-26 19:52:55,949 INFO L231 Difference]: Finished difference. Result has 104 places, 162 transitions, 1680 flow [2023-08-26 19:52:55,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1680, PETRI_PLACES=104, PETRI_TRANSITIONS=162} [2023-08-26 19:52:55,950 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 41 predicate places. [2023-08-26 19:52:55,950 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 162 transitions, 1680 flow [2023-08-26 19:52:55,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:55,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:55,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:55,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 19:52:55,951 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:55,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:55,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2102463787, now seen corresponding path program 10 times [2023-08-26 19:52:55,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:55,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134716982] [2023-08-26 19:52:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:55,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:56,155 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 19:52:56,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:56,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134716982] [2023-08-26 19:52:56,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134716982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:56,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:56,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 19:52:56,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858406929] [2023-08-26 19:52:56,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:56,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:52:56,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:56,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:52:56,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:52:56,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:52:56,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 162 transitions, 1680 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:56,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:56,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:52:56,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:57,040 INFO L124 PetriNetUnfolderBase]: 4171/7563 cut-off events. [2023-08-26 19:52:57,040 INFO L125 PetriNetUnfolderBase]: For 24872/26006 co-relation queries the response was YES. [2023-08-26 19:52:57,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28698 conditions, 7563 events. 4171/7563 cut-off events. For 24872/26006 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 56189 event pairs, 644 based on Foata normal form. 680/8037 useless extension candidates. Maximal degree in co-relation 28675. Up to 2943 conditions per place. [2023-08-26 19:52:57,081 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 112 selfloop transitions, 98 changer transitions 6/233 dead transitions. [2023-08-26 19:52:57,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 233 transitions, 2423 flow [2023-08-26 19:52:57,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 19:52:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 19:52:57,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1275 transitions. [2023-08-26 19:52:57,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4885057471264368 [2023-08-26 19:52:57,085 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1275 transitions. [2023-08-26 19:52:57,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1275 transitions. [2023-08-26 19:52:57,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:57,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1275 transitions. [2023-08-26 19:52:57,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 141.66666666666666) internal successors, (1275), 9 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:57,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:57,092 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:57,092 INFO L175 Difference]: Start difference. First operand has 104 places, 162 transitions, 1680 flow. Second operand 9 states and 1275 transitions. [2023-08-26 19:52:57,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 233 transitions, 2423 flow [2023-08-26 19:52:57,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 233 transitions, 2302 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-08-26 19:52:57,146 INFO L231 Difference]: Finished difference. Result has 107 places, 167 transitions, 1830 flow [2023-08-26 19:52:57,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1830, PETRI_PLACES=107, PETRI_TRANSITIONS=167} [2023-08-26 19:52:57,146 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 44 predicate places. [2023-08-26 19:52:57,146 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 167 transitions, 1830 flow [2023-08-26 19:52:57,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:57,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:57,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:57,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 19:52:57,147 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:57,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:57,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1046748397, now seen corresponding path program 11 times [2023-08-26 19:52:57,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:57,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963459370] [2023-08-26 19:52:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:57,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:57,385 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 19:52:57,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:57,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963459370] [2023-08-26 19:52:57,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963459370] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:57,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:57,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:52:57,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310992874] [2023-08-26 19:52:57,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:57,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:52:57,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:57,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:52:57,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:52:57,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:52:57,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 167 transitions, 1830 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:57,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:57,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:52:57,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:58,427 INFO L124 PetriNetUnfolderBase]: 4133/7467 cut-off events. [2023-08-26 19:52:58,427 INFO L125 PetriNetUnfolderBase]: For 32153/33170 co-relation queries the response was YES. [2023-08-26 19:52:58,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30369 conditions, 7467 events. 4133/7467 cut-off events. For 32153/33170 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 54997 event pairs, 1140 based on Foata normal form. 426/7722 useless extension candidates. Maximal degree in co-relation 30345. Up to 5446 conditions per place. [2023-08-26 19:52:58,492 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 151 selfloop transitions, 60 changer transitions 9/237 dead transitions. [2023-08-26 19:52:58,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 237 transitions, 2750 flow [2023-08-26 19:52:58,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 19:52:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 19:52:58,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1654 transitions. [2023-08-26 19:52:58,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4752873563218391 [2023-08-26 19:52:58,496 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1654 transitions. [2023-08-26 19:52:58,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1654 transitions. [2023-08-26 19:52:58,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:58,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1654 transitions. [2023-08-26 19:52:58,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 137.83333333333334) internal successors, (1654), 12 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:58,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:58,505 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:58,505 INFO L175 Difference]: Start difference. First operand has 107 places, 167 transitions, 1830 flow. Second operand 12 states and 1654 transitions. [2023-08-26 19:52:58,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 237 transitions, 2750 flow [2023-08-26 19:52:58,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 237 transitions, 2592 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-26 19:52:58,567 INFO L231 Difference]: Finished difference. Result has 113 places, 175 transitions, 1943 flow [2023-08-26 19:52:58,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1943, PETRI_PLACES=113, PETRI_TRANSITIONS=175} [2023-08-26 19:52:58,568 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 50 predicate places. [2023-08-26 19:52:58,568 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 175 transitions, 1943 flow [2023-08-26 19:52:58,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:58,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:58,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:58,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 19:52:58,569 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:58,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:58,569 INFO L85 PathProgramCache]: Analyzing trace with hash 240451193, now seen corresponding path program 12 times [2023-08-26 19:52:58,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:58,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506042035] [2023-08-26 19:52:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:58,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:58,785 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 19:52:58,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:58,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506042035] [2023-08-26 19:52:58,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506042035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:58,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:58,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:52:58,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516518613] [2023-08-26 19:52:58,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:58,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:52:58,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:58,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:52:58,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:52:58,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:52:58,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 175 transitions, 1943 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:58,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:58,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:52:58,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:59,412 INFO L124 PetriNetUnfolderBase]: 2280/4405 cut-off events. [2023-08-26 19:52:59,413 INFO L125 PetriNetUnfolderBase]: For 15245/16271 co-relation queries the response was YES. [2023-08-26 19:52:59,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17078 conditions, 4405 events. 2280/4405 cut-off events. For 15245/16271 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 31159 event pairs, 500 based on Foata normal form. 764/5075 useless extension candidates. Maximal degree in co-relation 17053. Up to 1980 conditions per place. [2023-08-26 19:52:59,439 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 120 selfloop transitions, 115 changer transitions 13/262 dead transitions. [2023-08-26 19:52:59,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 262 transitions, 2989 flow [2023-08-26 19:52:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 19:52:59,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 19:52:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1546 transitions. [2023-08-26 19:52:59,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846394984326019 [2023-08-26 19:52:59,442 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1546 transitions. [2023-08-26 19:52:59,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1546 transitions. [2023-08-26 19:52:59,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:59,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1546 transitions. [2023-08-26 19:52:59,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 140.54545454545453) internal successors, (1546), 11 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:59,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:59,448 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:59,448 INFO L175 Difference]: Start difference. First operand has 113 places, 175 transitions, 1943 flow. Second operand 11 states and 1546 transitions. [2023-08-26 19:52:59,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 262 transitions, 2989 flow [2023-08-26 19:52:59,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 262 transitions, 2837 flow, removed 9 selfloop flow, removed 11 redundant places. [2023-08-26 19:52:59,484 INFO L231 Difference]: Finished difference. Result has 114 places, 182 transitions, 2174 flow [2023-08-26 19:52:59,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1573, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2174, PETRI_PLACES=114, PETRI_TRANSITIONS=182} [2023-08-26 19:52:59,484 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 51 predicate places. [2023-08-26 19:52:59,484 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 182 transitions, 2174 flow [2023-08-26 19:52:59,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:59,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:59,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:59,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 19:52:59,485 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:52:59,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:59,486 INFO L85 PathProgramCache]: Analyzing trace with hash 656090593, now seen corresponding path program 13 times [2023-08-26 19:52:59,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:59,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976871297] [2023-08-26 19:52:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:59,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:59,658 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 19:52:59,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:59,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976871297] [2023-08-26 19:52:59,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976871297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:52:59,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:52:59,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:52:59,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013020125] [2023-08-26 19:52:59,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:52:59,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:52:59,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:59,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:52:59,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:52:59,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:52:59,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 182 transitions, 2174 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:59,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:59,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:52:59,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:00,351 INFO L124 PetriNetUnfolderBase]: 2464/4875 cut-off events. [2023-08-26 19:53:00,352 INFO L125 PetriNetUnfolderBase]: For 18877/19825 co-relation queries the response was YES. [2023-08-26 19:53:00,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19597 conditions, 4875 events. 2464/4875 cut-off events. For 18877/19825 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 35804 event pairs, 179 based on Foata normal form. 412/5189 useless extension candidates. Maximal degree in co-relation 19570. Up to 1454 conditions per place. [2023-08-26 19:53:00,389 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 114 selfloop transitions, 152 changer transitions 2/282 dead transitions. [2023-08-26 19:53:00,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 282 transitions, 3128 flow [2023-08-26 19:53:00,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 19:53:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 19:53:00,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1416 transitions. [2023-08-26 19:53:00,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882758620689655 [2023-08-26 19:53:00,392 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1416 transitions. [2023-08-26 19:53:00,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1416 transitions. [2023-08-26 19:53:00,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:00,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1416 transitions. [2023-08-26 19:53:00,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.6) internal successors, (1416), 10 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:00,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:00,398 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:00,398 INFO L175 Difference]: Start difference. First operand has 114 places, 182 transitions, 2174 flow. Second operand 10 states and 1416 transitions. [2023-08-26 19:53:00,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 282 transitions, 3128 flow [2023-08-26 19:53:00,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 282 transitions, 2947 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-08-26 19:53:00,451 INFO L231 Difference]: Finished difference. Result has 119 places, 206 transitions, 2635 flow [2023-08-26 19:53:00,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2635, PETRI_PLACES=119, PETRI_TRANSITIONS=206} [2023-08-26 19:53:00,451 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 56 predicate places. [2023-08-26 19:53:00,452 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 206 transitions, 2635 flow [2023-08-26 19:53:00,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:00,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:00,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:00,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 19:53:00,452 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:00,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:00,453 INFO L85 PathProgramCache]: Analyzing trace with hash -856563731, now seen corresponding path program 14 times [2023-08-26 19:53:00,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:00,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197523774] [2023-08-26 19:53:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:00,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:00,645 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 19:53:00,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:00,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197523774] [2023-08-26 19:53:00,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197523774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:00,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:00,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 19:53:00,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50888130] [2023-08-26 19:53:00,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:00,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:53:00,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:00,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:53:00,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:53:00,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:00,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 206 transitions, 2635 flow. Second operand has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:00,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:00,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:00,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:01,431 INFO L124 PetriNetUnfolderBase]: 2436/4853 cut-off events. [2023-08-26 19:53:01,431 INFO L125 PetriNetUnfolderBase]: For 28001/28985 co-relation queries the response was YES. [2023-08-26 19:53:01,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22173 conditions, 4853 events. 2436/4853 cut-off events. For 28001/28985 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 35819 event pairs, 396 based on Foata normal form. 296/5055 useless extension candidates. Maximal degree in co-relation 22144. Up to 1941 conditions per place. [2023-08-26 19:53:01,459 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 130 selfloop transitions, 142 changer transitions 5/291 dead transitions. [2023-08-26 19:53:01,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 291 transitions, 3667 flow [2023-08-26 19:53:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 19:53:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 19:53:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2076 transitions. [2023-08-26 19:53:01,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772413793103448 [2023-08-26 19:53:01,463 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2076 transitions. [2023-08-26 19:53:01,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2076 transitions. [2023-08-26 19:53:01,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:01,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2076 transitions. [2023-08-26 19:53:01,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 138.4) internal successors, (2076), 15 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:01,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 290.0) internal successors, (4640), 16 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:01,471 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 290.0) internal successors, (4640), 16 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:01,471 INFO L175 Difference]: Start difference. First operand has 119 places, 206 transitions, 2635 flow. Second operand 15 states and 2076 transitions. [2023-08-26 19:53:01,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 291 transitions, 3667 flow [2023-08-26 19:53:01,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 291 transitions, 3595 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-26 19:53:01,567 INFO L231 Difference]: Finished difference. Result has 129 places, 213 transitions, 2943 flow [2023-08-26 19:53:01,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2571, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2943, PETRI_PLACES=129, PETRI_TRANSITIONS=213} [2023-08-26 19:53:01,568 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 66 predicate places. [2023-08-26 19:53:01,568 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 213 transitions, 2943 flow [2023-08-26 19:53:01,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:01,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:01,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:01,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 19:53:01,568 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:01,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:01,569 INFO L85 PathProgramCache]: Analyzing trace with hash -256423549, now seen corresponding path program 15 times [2023-08-26 19:53:01,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:01,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003333889] [2023-08-26 19:53:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:01,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:01,756 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 19:53:01,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:01,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003333889] [2023-08-26 19:53:01,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003333889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:01,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:01,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:53:01,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866924640] [2023-08-26 19:53:01,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:01,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:53:01,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:01,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:53:01,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:53:01,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:01,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 213 transitions, 2943 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:01,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:01,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:01,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:02,557 INFO L124 PetriNetUnfolderBase]: 2294/4593 cut-off events. [2023-08-26 19:53:02,557 INFO L125 PetriNetUnfolderBase]: For 30800/31884 co-relation queries the response was YES. [2023-08-26 19:53:02,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22112 conditions, 4593 events. 2294/4593 cut-off events. For 30800/31884 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 33812 event pairs, 178 based on Foata normal form. 486/5020 useless extension candidates. Maximal degree in co-relation 22082. Up to 1332 conditions per place. [2023-08-26 19:53:02,587 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 116 selfloop transitions, 162 changer transitions 5/297 dead transitions. [2023-08-26 19:53:02,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 297 transitions, 3979 flow [2023-08-26 19:53:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 19:53:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 19:53:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1417 transitions. [2023-08-26 19:53:02,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4886206896551724 [2023-08-26 19:53:02,589 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1417 transitions. [2023-08-26 19:53:02,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1417 transitions. [2023-08-26 19:53:02,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:02,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1417 transitions. [2023-08-26 19:53:02,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.7) internal successors, (1417), 10 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:02,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:02,594 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:02,594 INFO L175 Difference]: Start difference. First operand has 129 places, 213 transitions, 2943 flow. Second operand 10 states and 1417 transitions. [2023-08-26 19:53:02,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 297 transitions, 3979 flow [2023-08-26 19:53:02,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 297 transitions, 3747 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-26 19:53:02,675 INFO L231 Difference]: Finished difference. Result has 132 places, 219 transitions, 3149 flow [2023-08-26 19:53:02,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3149, PETRI_PLACES=132, PETRI_TRANSITIONS=219} [2023-08-26 19:53:02,676 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 69 predicate places. [2023-08-26 19:53:02,676 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 219 transitions, 3149 flow [2023-08-26 19:53:02,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:02,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:02,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:02,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 19:53:02,676 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:02,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:02,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1893969183, now seen corresponding path program 16 times [2023-08-26 19:53:02,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:02,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875308492] [2023-08-26 19:53:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:02,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:02,892 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 19:53:02,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:02,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875308492] [2023-08-26 19:53:02,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875308492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:02,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:02,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 19:53:02,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332797588] [2023-08-26 19:53:02,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:02,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 19:53:02,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:02,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 19:53:02,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-26 19:53:02,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:02,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 219 transitions, 3149 flow. Second operand has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:02,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:02,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:02,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:03,761 INFO L124 PetriNetUnfolderBase]: 2227/4526 cut-off events. [2023-08-26 19:53:03,762 INFO L125 PetriNetUnfolderBase]: For 34606/35416 co-relation queries the response was YES. [2023-08-26 19:53:03,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22721 conditions, 4526 events. 2227/4526 cut-off events. For 34606/35416 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 33630 event pairs, 372 based on Foata normal form. 226/4687 useless extension candidates. Maximal degree in co-relation 22690. Up to 1750 conditions per place. [2023-08-26 19:53:03,802 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 138 selfloop transitions, 143 changer transitions 15/310 dead transitions. [2023-08-26 19:53:03,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 310 transitions, 4247 flow [2023-08-26 19:53:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 19:53:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 19:53:03,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2605 transitions. [2023-08-26 19:53:03,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727767695099819 [2023-08-26 19:53:03,806 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2605 transitions. [2023-08-26 19:53:03,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2605 transitions. [2023-08-26 19:53:03,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:03,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2605 transitions. [2023-08-26 19:53:03,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 137.10526315789474) internal successors, (2605), 19 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:03,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:03,818 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:03,819 INFO L175 Difference]: Start difference. First operand has 132 places, 219 transitions, 3149 flow. Second operand 19 states and 2605 transitions. [2023-08-26 19:53:03,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 310 transitions, 4247 flow [2023-08-26 19:53:03,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 310 transitions, 3976 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-08-26 19:53:03,908 INFO L231 Difference]: Finished difference. Result has 143 places, 218 transitions, 3175 flow [2023-08-26 19:53:03,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3175, PETRI_PLACES=143, PETRI_TRANSITIONS=218} [2023-08-26 19:53:03,909 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 80 predicate places. [2023-08-26 19:53:03,909 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 218 transitions, 3175 flow [2023-08-26 19:53:03,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:03,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:03,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:03,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 19:53:03,910 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:03,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:03,910 INFO L85 PathProgramCache]: Analyzing trace with hash 561616531, now seen corresponding path program 17 times [2023-08-26 19:53:03,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:03,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539222829] [2023-08-26 19:53:03,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:03,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:04,144 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 19:53:04,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:04,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539222829] [2023-08-26 19:53:04,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539222829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:04,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:04,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 19:53:04,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448567899] [2023-08-26 19:53:04,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:04,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 19:53:04,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:04,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 19:53:04,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-26 19:53:04,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:04,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 218 transitions, 3175 flow. Second operand has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:04,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:04,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:04,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:04,918 INFO L124 PetriNetUnfolderBase]: 2249/4575 cut-off events. [2023-08-26 19:53:04,918 INFO L125 PetriNetUnfolderBase]: For 36235/37043 co-relation queries the response was YES. [2023-08-26 19:53:04,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22875 conditions, 4575 events. 2249/4575 cut-off events. For 36235/37043 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 34120 event pairs, 572 based on Foata normal form. 120/4641 useless extension candidates. Maximal degree in co-relation 22844. Up to 3244 conditions per place. [2023-08-26 19:53:04,943 INFO L140 encePairwiseOnDemand]: 281/290 looper letters, 190 selfloop transitions, 62 changer transitions 31/297 dead transitions. [2023-08-26 19:53:04,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 297 transitions, 4363 flow [2023-08-26 19:53:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 19:53:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 19:53:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2321 transitions. [2023-08-26 19:53:04,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47079107505070994 [2023-08-26 19:53:04,946 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2321 transitions. [2023-08-26 19:53:04,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2321 transitions. [2023-08-26 19:53:04,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:04,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2321 transitions. [2023-08-26 19:53:04,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 136.52941176470588) internal successors, (2321), 17 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:04,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:04,952 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:04,952 INFO L175 Difference]: Start difference. First operand has 143 places, 218 transitions, 3175 flow. Second operand 17 states and 2321 transitions. [2023-08-26 19:53:04,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 297 transitions, 4363 flow [2023-08-26 19:53:05,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 297 transitions, 4036 flow, removed 2 selfloop flow, removed 14 redundant places. [2023-08-26 19:53:05,050 INFO L231 Difference]: Finished difference. Result has 143 places, 215 transitions, 2976 flow [2023-08-26 19:53:05,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2883, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2976, PETRI_PLACES=143, PETRI_TRANSITIONS=215} [2023-08-26 19:53:05,052 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 80 predicate places. [2023-08-26 19:53:05,052 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 215 transitions, 2976 flow [2023-08-26 19:53:05,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:05,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:05,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:05,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-26 19:53:05,052 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:05,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:05,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1710467467, now seen corresponding path program 18 times [2023-08-26 19:53:05,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:05,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809464034] [2023-08-26 19:53:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:05,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:05,258 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 19:53:05,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:05,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809464034] [2023-08-26 19:53:05,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809464034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:05,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:05,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 19:53:05,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236090919] [2023-08-26 19:53:05,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:05,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:53:05,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:05,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:53:05,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:53:05,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 290 [2023-08-26 19:53:05,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 215 transitions, 2976 flow. Second operand has 9 states, 9 states have (on average 121.77777777777777) internal successors, (1096), 9 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:05,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:05,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 290 [2023-08-26 19:53:05,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:06,241 INFO L124 PetriNetUnfolderBase]: 3828/6623 cut-off events. [2023-08-26 19:53:06,241 INFO L125 PetriNetUnfolderBase]: For 40051/40051 co-relation queries the response was YES. [2023-08-26 19:53:06,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31828 conditions, 6623 events. 3828/6623 cut-off events. For 40051/40051 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 42711 event pairs, 760 based on Foata normal form. 36/6659 useless extension candidates. Maximal degree in co-relation 31796. Up to 2939 conditions per place. [2023-08-26 19:53:06,281 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 169 selfloop transitions, 120 changer transitions 49/338 dead transitions. [2023-08-26 19:53:06,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 338 transitions, 4334 flow [2023-08-26 19:53:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 19:53:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 19:53:06,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1712 transitions. [2023-08-26 19:53:06,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45411140583554377 [2023-08-26 19:53:06,284 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1712 transitions. [2023-08-26 19:53:06,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1712 transitions. [2023-08-26 19:53:06,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:06,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1712 transitions. [2023-08-26 19:53:06,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 131.69230769230768) internal successors, (1712), 13 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:06,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 290.0) internal successors, (4060), 14 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:06,289 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 290.0) internal successors, (4060), 14 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:06,289 INFO L175 Difference]: Start difference. First operand has 143 places, 215 transitions, 2976 flow. Second operand 13 states and 1712 transitions. [2023-08-26 19:53:06,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 338 transitions, 4334 flow [2023-08-26 19:53:06,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 338 transitions, 4214 flow, removed 14 selfloop flow, removed 10 redundant places. [2023-08-26 19:53:06,377 INFO L231 Difference]: Finished difference. Result has 143 places, 194 transitions, 2768 flow [2023-08-26 19:53:06,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2862, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2768, PETRI_PLACES=143, PETRI_TRANSITIONS=194} [2023-08-26 19:53:06,378 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 80 predicate places. [2023-08-26 19:53:06,378 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 194 transitions, 2768 flow [2023-08-26 19:53:06,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 121.77777777777777) internal successors, (1096), 9 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:06,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:06,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:06,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 19:53:06,378 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:06,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:06,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1167770817, now seen corresponding path program 19 times [2023-08-26 19:53:06,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:06,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434085658] [2023-08-26 19:53:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:06,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:06,555 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 19:53:06,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:06,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434085658] [2023-08-26 19:53:06,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434085658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:06,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:06,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 19:53:06,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653992006] [2023-08-26 19:53:06,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:06,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 19:53:06,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:06,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 19:53:06,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-26 19:53:06,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:06,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 194 transitions, 2768 flow. Second operand has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:06,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:06,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:06,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:07,334 INFO L124 PetriNetUnfolderBase]: 1979/4087 cut-off events. [2023-08-26 19:53:07,335 INFO L125 PetriNetUnfolderBase]: For 34787/35571 co-relation queries the response was YES. [2023-08-26 19:53:07,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20346 conditions, 4087 events. 1979/4087 cut-off events. For 34787/35571 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 30330 event pairs, 360 based on Foata normal form. 252/4284 useless extension candidates. Maximal degree in co-relation 20314. Up to 1734 conditions per place. [2023-08-26 19:53:07,360 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 124 selfloop transitions, 118 changer transitions 21/277 dead transitions. [2023-08-26 19:53:07,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 277 transitions, 3851 flow [2023-08-26 19:53:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 19:53:07,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 19:53:07,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2201 transitions. [2023-08-26 19:53:07,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435344827586207 [2023-08-26 19:53:07,363 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2201 transitions. [2023-08-26 19:53:07,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2201 transitions. [2023-08-26 19:53:07,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:07,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2201 transitions. [2023-08-26 19:53:07,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 137.5625) internal successors, (2201), 16 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:07,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 290.0) internal successors, (4930), 17 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:07,367 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 290.0) internal successors, (4930), 17 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:07,367 INFO L175 Difference]: Start difference. First operand has 143 places, 194 transitions, 2768 flow. Second operand 16 states and 2201 transitions. [2023-08-26 19:53:07,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 277 transitions, 3851 flow [2023-08-26 19:53:07,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 277 transitions, 3717 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-08-26 19:53:07,431 INFO L231 Difference]: Finished difference. Result has 148 places, 190 transitions, 2791 flow [2023-08-26 19:53:07,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2637, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2791, PETRI_PLACES=148, PETRI_TRANSITIONS=190} [2023-08-26 19:53:07,431 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 85 predicate places. [2023-08-26 19:53:07,431 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 190 transitions, 2791 flow [2023-08-26 19:53:07,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:07,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:07,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:07,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 19:53:07,432 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:07,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:07,432 INFO L85 PathProgramCache]: Analyzing trace with hash -825046407, now seen corresponding path program 20 times [2023-08-26 19:53:07,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:07,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700708127] [2023-08-26 19:53:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:07,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:07,591 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 19:53:07,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:07,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700708127] [2023-08-26 19:53:07,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700708127] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:07,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:07,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 19:53:07,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044905097] [2023-08-26 19:53:07,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:07,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:53:07,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:07,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:53:07,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:53:07,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:07,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 190 transitions, 2791 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:07,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:07,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:07,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:08,161 INFO L124 PetriNetUnfolderBase]: 1795/3892 cut-off events. [2023-08-26 19:53:08,161 INFO L125 PetriNetUnfolderBase]: For 40284/40616 co-relation queries the response was YES. [2023-08-26 19:53:08,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19919 conditions, 3892 events. 1795/3892 cut-off events. For 40284/40616 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29636 event pairs, 314 based on Foata normal form. 186/4042 useless extension candidates. Maximal degree in co-relation 19885. Up to 1078 conditions per place. [2023-08-26 19:53:08,186 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 119 selfloop transitions, 119 changer transitions 11/262 dead transitions. [2023-08-26 19:53:08,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 262 transitions, 3736 flow [2023-08-26 19:53:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 19:53:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 19:53:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 994 transitions. [2023-08-26 19:53:08,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896551724137931 [2023-08-26 19:53:08,188 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 994 transitions. [2023-08-26 19:53:08,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 994 transitions. [2023-08-26 19:53:08,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:08,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 994 transitions. [2023-08-26 19:53:08,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:08,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:08,190 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:08,190 INFO L175 Difference]: Start difference. First operand has 148 places, 190 transitions, 2791 flow. Second operand 7 states and 994 transitions. [2023-08-26 19:53:08,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 262 transitions, 3736 flow [2023-08-26 19:53:08,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 262 transitions, 3672 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-08-26 19:53:08,251 INFO L231 Difference]: Finished difference. Result has 145 places, 210 transitions, 3383 flow [2023-08-26 19:53:08,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3383, PETRI_PLACES=145, PETRI_TRANSITIONS=210} [2023-08-26 19:53:08,251 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 82 predicate places. [2023-08-26 19:53:08,251 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 210 transitions, 3383 flow [2023-08-26 19:53:08,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:08,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:08,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:08,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 19:53:08,252 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:08,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:08,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1492474561, now seen corresponding path program 21 times [2023-08-26 19:53:08,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:08,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138965209] [2023-08-26 19:53:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:08,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:08,459 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 19:53:08,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:08,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138965209] [2023-08-26 19:53:08,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138965209] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:08,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:08,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:53:08,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630696346] [2023-08-26 19:53:08,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:08,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:53:08,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:08,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:53:08,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:53:08,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:08,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 210 transitions, 3383 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:08,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:08,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:08,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:09,088 INFO L124 PetriNetUnfolderBase]: 1731/3706 cut-off events. [2023-08-26 19:53:09,088 INFO L125 PetriNetUnfolderBase]: For 43991/44827 co-relation queries the response was YES. [2023-08-26 19:53:09,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20663 conditions, 3706 events. 1731/3706 cut-off events. For 43991/44827 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27586 event pairs, 140 based on Foata normal form. 320/3987 useless extension candidates. Maximal degree in co-relation 20629. Up to 1106 conditions per place. [2023-08-26 19:53:09,113 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 94 selfloop transitions, 153 changer transitions 14/274 dead transitions. [2023-08-26 19:53:09,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 274 transitions, 4201 flow [2023-08-26 19:53:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 19:53:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 19:53:09,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1275 transitions. [2023-08-26 19:53:09,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4885057471264368 [2023-08-26 19:53:09,115 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1275 transitions. [2023-08-26 19:53:09,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1275 transitions. [2023-08-26 19:53:09,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:09,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1275 transitions. [2023-08-26 19:53:09,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 141.66666666666666) internal successors, (1275), 9 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:09,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:09,118 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:09,118 INFO L175 Difference]: Start difference. First operand has 145 places, 210 transitions, 3383 flow. Second operand 9 states and 1275 transitions. [2023-08-26 19:53:09,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 274 transitions, 4201 flow [2023-08-26 19:53:09,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 274 transitions, 4161 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-26 19:53:09,187 INFO L231 Difference]: Finished difference. Result has 151 places, 205 transitions, 3592 flow [2023-08-26 19:53:09,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3592, PETRI_PLACES=151, PETRI_TRANSITIONS=205} [2023-08-26 19:53:09,188 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 88 predicate places. [2023-08-26 19:53:09,188 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 205 transitions, 3592 flow [2023-08-26 19:53:09,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:09,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:09,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:09,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-26 19:53:09,188 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:09,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:09,188 INFO L85 PathProgramCache]: Analyzing trace with hash 81372805, now seen corresponding path program 22 times [2023-08-26 19:53:09,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:09,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693686761] [2023-08-26 19:53:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:09,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:09,357 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 19:53:09,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:09,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693686761] [2023-08-26 19:53:09,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693686761] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:09,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:09,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 19:53:09,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454184746] [2023-08-26 19:53:09,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:09,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:53:09,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:09,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:53:09,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:53:09,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:09,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 205 transitions, 3592 flow. Second operand has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:09,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:09,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:09,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:09,954 INFO L124 PetriNetUnfolderBase]: 1696/3663 cut-off events. [2023-08-26 19:53:09,954 INFO L125 PetriNetUnfolderBase]: For 50487/51152 co-relation queries the response was YES. [2023-08-26 19:53:09,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21336 conditions, 3663 events. 1696/3663 cut-off events. For 50487/51152 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 27573 event pairs, 146 based on Foata normal form. 294/3918 useless extension candidates. Maximal degree in co-relation 21301. Up to 1044 conditions per place. [2023-08-26 19:53:09,978 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 104 selfloop transitions, 161 changer transitions 6/284 dead transitions. [2023-08-26 19:53:09,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 284 transitions, 4670 flow [2023-08-26 19:53:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 19:53:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 19:53:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1413 transitions. [2023-08-26 19:53:09,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48724137931034484 [2023-08-26 19:53:09,980 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1413 transitions. [2023-08-26 19:53:09,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1413 transitions. [2023-08-26 19:53:09,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:09,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1413 transitions. [2023-08-26 19:53:09,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.3) internal successors, (1413), 10 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:09,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:09,984 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:09,984 INFO L175 Difference]: Start difference. First operand has 151 places, 205 transitions, 3592 flow. Second operand 10 states and 1413 transitions. [2023-08-26 19:53:09,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 284 transitions, 4670 flow [2023-08-26 19:53:10,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 284 transitions, 4359 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-08-26 19:53:10,061 INFO L231 Difference]: Finished difference. Result has 151 places, 213 transitions, 3808 flow [2023-08-26 19:53:10,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3808, PETRI_PLACES=151, PETRI_TRANSITIONS=213} [2023-08-26 19:53:10,062 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 88 predicate places. [2023-08-26 19:53:10,062 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 213 transitions, 3808 flow [2023-08-26 19:53:10,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:10,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:10,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:10,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-26 19:53:10,063 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:10,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:10,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1314185333, now seen corresponding path program 23 times [2023-08-26 19:53:10,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:10,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851333272] [2023-08-26 19:53:10,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:10,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:10,229 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 19:53:10,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:10,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851333272] [2023-08-26 19:53:10,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851333272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:10,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:10,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 19:53:10,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587488577] [2023-08-26 19:53:10,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:10,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:53:10,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:53:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:53:10,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:10,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 213 transitions, 3808 flow. Second operand has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:10,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:10,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:10,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:10,821 INFO L124 PetriNetUnfolderBase]: 1729/3736 cut-off events. [2023-08-26 19:53:10,821 INFO L125 PetriNetUnfolderBase]: For 53679/54380 co-relation queries the response was YES. [2023-08-26 19:53:10,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21652 conditions, 3736 events. 1729/3736 cut-off events. For 53679/54380 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 28268 event pairs, 162 based on Foata normal form. 322/4021 useless extension candidates. Maximal degree in co-relation 21619. Up to 1066 conditions per place. [2023-08-26 19:53:10,843 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 102 selfloop transitions, 156 changer transitions 17/288 dead transitions. [2023-08-26 19:53:10,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 288 transitions, 4803 flow [2023-08-26 19:53:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 19:53:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 19:53:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1413 transitions. [2023-08-26 19:53:10,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48724137931034484 [2023-08-26 19:53:10,845 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1413 transitions. [2023-08-26 19:53:10,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1413 transitions. [2023-08-26 19:53:10,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:10,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1413 transitions. [2023-08-26 19:53:10,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.3) internal successors, (1413), 10 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:10,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:10,849 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:10,849 INFO L175 Difference]: Start difference. First operand has 151 places, 213 transitions, 3808 flow. Second operand 10 states and 1413 transitions. [2023-08-26 19:53:10,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 288 transitions, 4803 flow [2023-08-26 19:53:10,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 288 transitions, 4489 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-26 19:53:10,933 INFO L231 Difference]: Finished difference. Result has 155 places, 209 transitions, 3777 flow [2023-08-26 19:53:10,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3777, PETRI_PLACES=155, PETRI_TRANSITIONS=209} [2023-08-26 19:53:10,933 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 92 predicate places. [2023-08-26 19:53:10,934 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 209 transitions, 3777 flow [2023-08-26 19:53:10,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:10,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:10,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:10,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-26 19:53:10,934 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:10,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash -20472539, now seen corresponding path program 24 times [2023-08-26 19:53:10,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:10,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292706581] [2023-08-26 19:53:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:10,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:11,104 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 19:53:11,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:11,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292706581] [2023-08-26 19:53:11,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292706581] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:11,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:11,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 19:53:11,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60995045] [2023-08-26 19:53:11,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:11,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:53:11,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:53:11,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:53:11,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:11,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 209 transitions, 3777 flow. Second operand has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:11,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:11,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:11,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:11,694 INFO L124 PetriNetUnfolderBase]: 1670/3650 cut-off events. [2023-08-26 19:53:11,694 INFO L125 PetriNetUnfolderBase]: For 54116/54823 co-relation queries the response was YES. [2023-08-26 19:53:11,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21561 conditions, 3650 events. 1670/3650 cut-off events. For 54116/54823 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 27745 event pairs, 160 based on Foata normal form. 334/3945 useless extension candidates. Maximal degree in co-relation 21527. Up to 1050 conditions per place. [2023-08-26 19:53:11,721 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 94 selfloop transitions, 159 changer transitions 20/285 dead transitions. [2023-08-26 19:53:11,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 285 transitions, 4754 flow [2023-08-26 19:53:11,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 19:53:11,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 19:53:11,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1415 transitions. [2023-08-26 19:53:11,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879310344827586 [2023-08-26 19:53:11,723 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1415 transitions. [2023-08-26 19:53:11,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1415 transitions. [2023-08-26 19:53:11,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:11,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1415 transitions. [2023-08-26 19:53:11,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.5) internal successors, (1415), 10 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:11,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:11,726 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:11,726 INFO L175 Difference]: Start difference. First operand has 155 places, 209 transitions, 3777 flow. Second operand 10 states and 1415 transitions. [2023-08-26 19:53:11,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 285 transitions, 4754 flow [2023-08-26 19:53:11,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 285 transitions, 4627 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-26 19:53:11,810 INFO L231 Difference]: Finished difference. Result has 158 places, 209 transitions, 4031 flow [2023-08-26 19:53:11,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=3666, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4031, PETRI_PLACES=158, PETRI_TRANSITIONS=209} [2023-08-26 19:53:11,811 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 95 predicate places. [2023-08-26 19:53:11,811 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 209 transitions, 4031 flow [2023-08-26 19:53:11,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:11,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:11,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:11,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-26 19:53:11,811 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:11,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:11,811 INFO L85 PathProgramCache]: Analyzing trace with hash 454075907, now seen corresponding path program 25 times [2023-08-26 19:53:11,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:11,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954084900] [2023-08-26 19:53:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:11,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:11,970 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 19:53:11,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:11,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954084900] [2023-08-26 19:53:11,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954084900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:11,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:11,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:53:11,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434133498] [2023-08-26 19:53:11,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:11,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:53:11,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:11,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:53:11,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:53:11,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:11,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 209 transitions, 4031 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:11,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:11,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:11,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:12,382 INFO L124 PetriNetUnfolderBase]: 786/1789 cut-off events. [2023-08-26 19:53:12,382 INFO L125 PetriNetUnfolderBase]: For 24009/24297 co-relation queries the response was YES. [2023-08-26 19:53:12,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10869 conditions, 1789 events. 786/1789 cut-off events. For 24009/24297 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11836 event pairs, 176 based on Foata normal form. 170/1943 useless extension candidates. Maximal degree in co-relation 10835. Up to 1027 conditions per place. [2023-08-26 19:53:12,394 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 106 selfloop transitions, 26 changer transitions 51/195 dead transitions. [2023-08-26 19:53:12,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 195 transitions, 3335 flow [2023-08-26 19:53:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 19:53:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 19:53:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1517 transitions. [2023-08-26 19:53:12,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4755485893416928 [2023-08-26 19:53:12,400 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1517 transitions. [2023-08-26 19:53:12,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1517 transitions. [2023-08-26 19:53:12,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:12,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1517 transitions. [2023-08-26 19:53:12,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 137.9090909090909) internal successors, (1517), 11 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:12,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:12,405 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:12,405 INFO L175 Difference]: Start difference. First operand has 158 places, 209 transitions, 4031 flow. Second operand 11 states and 1517 transitions. [2023-08-26 19:53:12,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 195 transitions, 3335 flow [2023-08-26 19:53:12,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 195 transitions, 3081 flow, removed 25 selfloop flow, removed 12 redundant places. [2023-08-26 19:53:12,455 INFO L231 Difference]: Finished difference. Result has 155 places, 118 transitions, 1614 flow [2023-08-26 19:53:12,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1614, PETRI_PLACES=155, PETRI_TRANSITIONS=118} [2023-08-26 19:53:12,456 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 92 predicate places. [2023-08-26 19:53:12,456 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 118 transitions, 1614 flow [2023-08-26 19:53:12,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:12,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:12,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:12,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-26 19:53:12,456 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:12,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:12,457 INFO L85 PathProgramCache]: Analyzing trace with hash 757936535, now seen corresponding path program 26 times [2023-08-26 19:53:12,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:12,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617171659] [2023-08-26 19:53:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:12,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:12,659 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 19:53:12,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:12,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617171659] [2023-08-26 19:53:12,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617171659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:12,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:12,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 19:53:12,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37604208] [2023-08-26 19:53:12,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:12,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 19:53:12,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:12,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 19:53:12,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-26 19:53:12,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:12,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 118 transitions, 1614 flow. Second operand has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:12,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:12,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:12,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:13,074 INFO L124 PetriNetUnfolderBase]: 604/1379 cut-off events. [2023-08-26 19:53:13,074 INFO L125 PetriNetUnfolderBase]: For 13873/14021 co-relation queries the response was YES. [2023-08-26 19:53:13,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7260 conditions, 1379 events. 604/1379 cut-off events. For 13873/14021 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8526 event pairs, 176 based on Foata normal form. 24/1387 useless extension candidates. Maximal degree in co-relation 7225. Up to 1031 conditions per place. [2023-08-26 19:53:13,085 INFO L140 encePairwiseOnDemand]: 282/290 looper letters, 107 selfloop transitions, 21 changer transitions 8/148 dead transitions. [2023-08-26 19:53:13,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 148 transitions, 2024 flow [2023-08-26 19:53:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 19:53:13,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 19:53:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2005 transitions. [2023-08-26 19:53:13,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46091954022988507 [2023-08-26 19:53:13,087 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2005 transitions. [2023-08-26 19:53:13,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2005 transitions. [2023-08-26 19:53:13,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:13,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2005 transitions. [2023-08-26 19:53:13,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 133.66666666666666) internal successors, (2005), 15 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:13,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 290.0) internal successors, (4640), 16 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:13,094 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 290.0) internal successors, (4640), 16 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:13,094 INFO L175 Difference]: Start difference. First operand has 155 places, 118 transitions, 1614 flow. Second operand 15 states and 2005 transitions. [2023-08-26 19:53:13,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 148 transitions, 2024 flow [2023-08-26 19:53:13,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 148 transitions, 1704 flow, removed 45 selfloop flow, removed 33 redundant places. [2023-08-26 19:53:13,109 INFO L231 Difference]: Finished difference. Result has 124 places, 113 transitions, 1287 flow [2023-08-26 19:53:13,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1287, PETRI_PLACES=124, PETRI_TRANSITIONS=113} [2023-08-26 19:53:13,110 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 61 predicate places. [2023-08-26 19:53:13,110 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 113 transitions, 1287 flow [2023-08-26 19:53:13,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:13,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:13,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:13,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-26 19:53:13,111 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:13,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:13,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1487192239, now seen corresponding path program 27 times [2023-08-26 19:53:13,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:13,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280916680] [2023-08-26 19:53:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:13,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:13,310 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 19:53:13,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:13,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280916680] [2023-08-26 19:53:13,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280916680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:13,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:13,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 19:53:13,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927644893] [2023-08-26 19:53:13,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:13,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 19:53:13,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:13,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 19:53:13,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-26 19:53:13,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:13,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 113 transitions, 1287 flow. Second operand has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:13,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:13,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:13,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:13,627 INFO L124 PetriNetUnfolderBase]: 560/1275 cut-off events. [2023-08-26 19:53:13,627 INFO L125 PetriNetUnfolderBase]: For 8990/9108 co-relation queries the response was YES. [2023-08-26 19:53:13,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5949 conditions, 1275 events. 560/1275 cut-off events. For 8990/9108 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7701 event pairs, 172 based on Foata normal form. 20/1279 useless extension candidates. Maximal degree in co-relation 5925. Up to 935 conditions per place. [2023-08-26 19:53:13,634 INFO L140 encePairwiseOnDemand]: 282/290 looper letters, 85 selfloop transitions, 11 changer transitions 30/138 dead transitions. [2023-08-26 19:53:13,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 138 transitions, 1611 flow [2023-08-26 19:53:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 19:53:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 19:53:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1875 transitions. [2023-08-26 19:53:13,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4618226600985222 [2023-08-26 19:53:13,636 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1875 transitions. [2023-08-26 19:53:13,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1875 transitions. [2023-08-26 19:53:13,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:13,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1875 transitions. [2023-08-26 19:53:13,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 133.92857142857142) internal successors, (1875), 14 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:13,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:13,641 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:13,641 INFO L175 Difference]: Start difference. First operand has 124 places, 113 transitions, 1287 flow. Second operand 14 states and 1875 transitions. [2023-08-26 19:53:13,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 138 transitions, 1611 flow [2023-08-26 19:53:13,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 138 transitions, 1485 flow, removed 4 selfloop flow, removed 23 redundant places. [2023-08-26 19:53:13,654 INFO L231 Difference]: Finished difference. Result has 113 places, 94 transitions, 980 flow [2023-08-26 19:53:13,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=980, PETRI_PLACES=113, PETRI_TRANSITIONS=94} [2023-08-26 19:53:13,655 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 50 predicate places. [2023-08-26 19:53:13,655 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 94 transitions, 980 flow [2023-08-26 19:53:13,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:13,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:13,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:13,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-26 19:53:13,655 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:13,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash 619481137, now seen corresponding path program 28 times [2023-08-26 19:53:13,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:13,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427968463] [2023-08-26 19:53:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:13,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:53:13,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:13,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427968463] [2023-08-26 19:53:13,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427968463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:13,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:13,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:53:13,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800116523] [2023-08-26 19:53:13,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:13,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:53:13,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:13,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:53:13,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:53:13,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:13,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 94 transitions, 980 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:13,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:13,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:13,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:14,006 INFO L124 PetriNetUnfolderBase]: 143/356 cut-off events. [2023-08-26 19:53:14,006 INFO L125 PetriNetUnfolderBase]: For 2370/2458 co-relation queries the response was YES. [2023-08-26 19:53:14,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1718 conditions, 356 events. 143/356 cut-off events. For 2370/2458 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1509 event pairs, 2 based on Foata normal form. 80/436 useless extension candidates. Maximal degree in co-relation 1696. Up to 123 conditions per place. [2023-08-26 19:53:14,008 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 37 selfloop transitions, 15 changer transitions 27/87 dead transitions. [2023-08-26 19:53:14,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 87 transitions, 829 flow [2023-08-26 19:53:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 19:53:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 19:53:14,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1225 transitions. [2023-08-26 19:53:14,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46934865900383144 [2023-08-26 19:53:14,010 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1225 transitions. [2023-08-26 19:53:14,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1225 transitions. [2023-08-26 19:53:14,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:14,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1225 transitions. [2023-08-26 19:53:14,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 136.11111111111111) internal successors, (1225), 9 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:14,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:14,014 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:14,014 INFO L175 Difference]: Start difference. First operand has 113 places, 94 transitions, 980 flow. Second operand 9 states and 1225 transitions. [2023-08-26 19:53:14,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 87 transitions, 829 flow [2023-08-26 19:53:14,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 632 flow, removed 22 selfloop flow, removed 26 redundant places. [2023-08-26 19:53:14,019 INFO L231 Difference]: Finished difference. Result has 81 places, 43 transitions, 259 flow [2023-08-26 19:53:14,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=259, PETRI_PLACES=81, PETRI_TRANSITIONS=43} [2023-08-26 19:53:14,020 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2023-08-26 19:53:14,020 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 43 transitions, 259 flow [2023-08-26 19:53:14,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:14,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:14,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:14,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-26 19:53:14,020 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 19:53:14,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:14,021 INFO L85 PathProgramCache]: Analyzing trace with hash -155548305, now seen corresponding path program 29 times [2023-08-26 19:53:14,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:14,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865822410] [2023-08-26 19:53:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:14,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:14,189 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 19:53:14,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:14,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865822410] [2023-08-26 19:53:14,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865822410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:53:14,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:53:14,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 19:53:14,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115967897] [2023-08-26 19:53:14,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:53:14,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:53:14,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:14,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:53:14,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:53:14,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 19:53:14,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 43 transitions, 259 flow. Second operand has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:14,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:14,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 19:53:14,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:14,300 INFO L124 PetriNetUnfolderBase]: 36/103 cut-off events. [2023-08-26 19:53:14,301 INFO L125 PetriNetUnfolderBase]: For 338/338 co-relation queries the response was YES. [2023-08-26 19:53:14,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 103 events. 36/103 cut-off events. For 338/338 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 277 event pairs, 0 based on Foata normal form. 4/107 useless extension candidates. Maximal degree in co-relation 422. Up to 27 conditions per place. [2023-08-26 19:53:14,301 INFO L140 encePairwiseOnDemand]: 282/290 looper letters, 0 selfloop transitions, 0 changer transitions 42/42 dead transitions. [2023-08-26 19:53:14,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 42 transitions, 305 flow [2023-08-26 19:53:14,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 19:53:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 19:53:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1190 transitions. [2023-08-26 19:53:14,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559386973180077 [2023-08-26 19:53:14,303 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1190 transitions. [2023-08-26 19:53:14,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1190 transitions. [2023-08-26 19:53:14,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:14,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1190 transitions. [2023-08-26 19:53:14,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 132.22222222222223) internal successors, (1190), 9 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:14,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:14,306 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:14,306 INFO L175 Difference]: Start difference. First operand has 81 places, 43 transitions, 259 flow. Second operand 9 states and 1190 transitions. [2023-08-26 19:53:14,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 42 transitions, 305 flow [2023-08-26 19:53:14,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 218 flow, removed 12 selfloop flow, removed 18 redundant places. [2023-08-26 19:53:14,308 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2023-08-26 19:53:14,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2023-08-26 19:53:14,308 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2023-08-26 19:53:14,308 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2023-08-26 19:53:14,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:14,313 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 21 remaining) [2023-08-26 19:53:14,314 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 21 remaining) [2023-08-26 19:53:14,314 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 21 remaining) [2023-08-26 19:53:14,314 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 21 remaining) [2023-08-26 19:53:14,314 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 21 remaining) [2023-08-26 19:53:14,314 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 21 remaining) [2023-08-26 19:53:14,314 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 21 remaining) [2023-08-26 19:53:14,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 21 remaining) [2023-08-26 19:53:14,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 21 remaining) [2023-08-26 19:53:14,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 21 remaining) [2023-08-26 19:53:14,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 21 remaining) [2023-08-26 19:53:14,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 21 remaining) [2023-08-26 19:53:14,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 21 remaining) [2023-08-26 19:53:14,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 21 remaining) [2023-08-26 19:53:14,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 21 remaining) [2023-08-26 19:53:14,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 21 remaining) [2023-08-26 19:53:14,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONASSERT (4 of 21 remaining) [2023-08-26 19:53:14,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 21 remaining) [2023-08-26 19:53:14,315 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 21 remaining) [2023-08-26 19:53:14,316 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 21 remaining) [2023-08-26 19:53:14,316 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 21 remaining) [2023-08-26 19:53:14,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-26 19:53:14,316 INFO L445 BasicCegarLoop]: Path program histogram: [29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:14,319 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 19:53:14,319 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 19:53:14,321 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 07:53:14 BasicIcfg [2023-08-26 19:53:14,322 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 19:53:14,325 INFO L158 Benchmark]: Toolchain (without parser) took 40510.94ms. Allocated memory was 375.4MB in the beginning and 1.7GB in the end (delta: 1.3GB). Free memory was 331.6MB in the beginning and 1.2GB in the end (delta: -852.5MB). Peak memory consumption was 484.4MB. Max. memory is 16.0GB. [2023-08-26 19:53:14,325 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 375.4MB. Free memory was 352.3MB in the beginning and 352.3MB in the end (delta: 25.2kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 19:53:14,326 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.85ms. Allocated memory is still 375.4MB. Free memory was 331.6MB in the beginning and 320.1MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 19:53:14,326 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.70ms. Allocated memory is still 375.4MB. Free memory was 320.1MB in the beginning and 318.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 19:53:14,326 INFO L158 Benchmark]: Boogie Preprocessor took 35.58ms. Allocated memory is still 375.4MB. Free memory was 318.0MB in the beginning and 316.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 19:53:14,327 INFO L158 Benchmark]: RCFGBuilder took 680.29ms. Allocated memory is still 375.4MB. Free memory was 315.9MB in the beginning and 289.6MB in the end (delta: 26.2MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-26 19:53:14,327 INFO L158 Benchmark]: TraceAbstraction took 39502.79ms. Allocated memory was 375.4MB in the beginning and 1.7GB in the end (delta: 1.3GB). Free memory was 288.6MB in the beginning and 1.2GB in the end (delta: -895.5MB). Peak memory consumption was 442.5MB. Max. memory is 16.0GB. [2023-08-26 19:53:14,329 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 375.4MB. Free memory was 352.3MB in the beginning and 352.3MB in the end (delta: 25.2kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 222.85ms. Allocated memory is still 375.4MB. Free memory was 331.6MB in the beginning and 320.1MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 62.70ms. Allocated memory is still 375.4MB. Free memory was 320.1MB in the beginning and 318.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 35.58ms. Allocated memory is still 375.4MB. Free memory was 318.0MB in the beginning and 316.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 680.29ms. Allocated memory is still 375.4MB. Free memory was 315.9MB in the beginning and 289.6MB in the end (delta: 26.2MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * TraceAbstraction took 39502.79ms. Allocated memory was 375.4MB in the beginning and 1.7GB in the end (delta: 1.3GB). Free memory was 288.6MB in the beginning and 1.2GB in the end (delta: -895.5MB). Peak memory consumption was 442.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.6s, 154 PlacesBefore, 63 PlacesAfterwards, 143 TransitionsBefore, 50 TransitionsAfterwards, 1702 CoEnabledTransitionPairs, 7 FixpointIterations, 75 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 130 TotalNumberOfCompositions, 8882 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3852, independent: 3616, independent conditional: 0, independent unconditional: 3616, dependent: 236, dependent conditional: 0, dependent unconditional: 236, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 869, independent: 838, independent conditional: 0, independent unconditional: 838, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3852, independent: 2778, independent conditional: 0, independent unconditional: 2778, dependent: 205, dependent conditional: 0, dependent unconditional: 205, unknown: 869, unknown conditional: 0, unknown unconditional: 869] , Statistics on independence cache: Total cache size (in pairs): 244, Positive cache size: 227, Positive conditional cache size: 0, Positive unconditional cache size: 227, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 192 locations, 21 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: 39.4s, OverallIterations: 38, TraceHistogramMax: 1, PathProgramHistogramMax: 29, EmptinessCheckTime: 0.0s, AutomataDifference: 26.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1972 SdHoareTripleChecker+Valid, 6.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1972 mSDsluCounter, 102 SdHoareTripleChecker+Invalid, 4.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 79 mSDsCounter, 571 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10344 IncrementalHoareTripleChecker+Invalid, 10915 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 571 mSolverCounterUnsat, 23 mSDtfsCounter, 10344 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 359 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4031occurred in iteration=33, InterpolantAutomatonStates: 337, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 5.9s InterpolantComputationTime, 1035 NumberOfCodeBlocks, 1035 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 997 ConstructedInterpolants, 0 QuantifiedInterpolants, 3656 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 38 InterpolantComputations, 38 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 19:53:14,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...