/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-bakery-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 19:38:15,160 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 19:38:15,220 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 19:38:15,223 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 19:38:15,224 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 19:38:15,251 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 19:38:15,252 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 19:38:15,252 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 19:38:15,252 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 19:38:15,255 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 19:38:15,255 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 19:38:15,255 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 19:38:15,256 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 19:38:15,257 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 19:38:15,257 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 19:38:15,257 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 19:38:15,257 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 19:38:15,257 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 19:38:15,257 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 19:38:15,258 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 19:38:15,258 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 19:38:15,258 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 19:38:15,258 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 19:38:15,259 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 19:38:15,259 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 19:38:15,259 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 19:38:15,259 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 19:38:15,259 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:38:15,260 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 19:38:15,260 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 19:38:15,260 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 19:38:15,261 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 19:38:15,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 19:38:15,261 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 19:38:15,261 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 19:38:15,261 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 19:38:15,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 19:38:15,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 19:38:15,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 19:38:15,501 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 19:38:15,502 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 19:38:15,503 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-bakery-3.wvr.c [2023-08-26 19:38:16,415 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 19:38:16,583 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 19:38:16,584 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-3.wvr.c [2023-08-26 19:38:16,591 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5820e7778/2368ba9d357349dfa0773ec84bcd4be6/FLAG2e7272d38 [2023-08-26 19:38:16,598 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5820e7778/2368ba9d357349dfa0773ec84bcd4be6 [2023-08-26 19:38:16,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 19:38:16,601 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 19:38:16,601 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 19:38:16,602 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 19:38:16,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 19:38:16,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:38:16" (1/1) ... [2023-08-26 19:38:16,604 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3afe5464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:38:16, skipping insertion in model container [2023-08-26 19:38:16,604 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:38:16" (1/1) ... [2023-08-26 19:38:16,622 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 19:38:16,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:38:16,729 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 19:38:16,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:38:16,763 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 19:38:16,764 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 19:38:16,768 INFO L206 MainTranslator]: Completed translation [2023-08-26 19:38:16,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:38:16 WrapperNode [2023-08-26 19:38:16,768 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 19:38:16,772 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 19:38:16,772 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 19:38:16,772 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 19:38:16,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:38:16" (1/1) ... [2023-08-26 19:38:16,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:38:16" (1/1) ... [2023-08-26 19:38:16,805 INFO L138 Inliner]: procedures = 22, calls = 111, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 267 [2023-08-26 19:38:16,805 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 19:38:16,805 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 19:38:16,805 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 19:38:16,806 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 19:38:16,811 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:38:16" (1/1) ... [2023-08-26 19:38:16,811 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:38:16" (1/1) ... [2023-08-26 19:38:16,816 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:38:16" (1/1) ... [2023-08-26 19:38:16,816 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:38:16" (1/1) ... [2023-08-26 19:38:16,821 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:38:16" (1/1) ... [2023-08-26 19:38:16,822 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:38:16" (1/1) ... [2023-08-26 19:38:16,823 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:38:16" (1/1) ... [2023-08-26 19:38:16,824 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:38:16" (1/1) ... [2023-08-26 19:38:16,826 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 19:38:16,826 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 19:38:16,827 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 19:38:16,827 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 19:38:16,827 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:38:16" (1/1) ... [2023-08-26 19:38:16,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:38:16,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:38:16,858 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 19:38:16,865 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 19:38:16,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 19:38:16,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 19:38:16,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 19:38:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 19:38:16,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 19:38:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 19:38:16,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 19:38:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 19:38:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 19:38:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 19:38:16,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 19:38:16,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 19:38:16,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 19:38:16,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 19:38:16,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 19:38:16,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 19:38:16,889 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 19:38:16,975 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 19:38:16,977 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 19:38:17,265 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 19:38:17,332 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 19:38:17,332 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 19:38:17,334 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:38:17 BoogieIcfgContainer [2023-08-26 19:38:17,334 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 19:38:17,335 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 19:38:17,335 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 19:38:17,337 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 19:38:17,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:38:16" (1/3) ... [2023-08-26 19:38:17,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee7b15b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:38:17, skipping insertion in model container [2023-08-26 19:38:17,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:38:16" (2/3) ... [2023-08-26 19:38:17,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee7b15b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:38:17, skipping insertion in model container [2023-08-26 19:38:17,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:38:17" (3/3) ... [2023-08-26 19:38:17,339 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-bakery-3.wvr.c [2023-08-26 19:38:17,358 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 19:38:17,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-26 19:38:17,359 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 19:38:17,402 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 19:38:17,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 360 flow [2023-08-26 19:38:17,490 INFO L124 PetriNetUnfolderBase]: 2/165 cut-off events. [2023-08-26 19:38:17,491 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 19:38:17,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 165 events. 2/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 157 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 118. Up to 2 conditions per place. [2023-08-26 19:38:17,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 360 flow [2023-08-26 19:38:17,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 154 transitions, 326 flow [2023-08-26 19:38:17,506 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 19:38:17,519 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 154 transitions, 326 flow [2023-08-26 19:38:17,521 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 154 transitions, 326 flow [2023-08-26 19:38:17,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 154 transitions, 326 flow [2023-08-26 19:38:17,543 INFO L124 PetriNetUnfolderBase]: 2/154 cut-off events. [2023-08-26 19:38:17,543 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 19:38:17,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 154 events. 2/154 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 156 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 118. Up to 2 conditions per place. [2023-08-26 19:38:17,545 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-26 19:38:21,630 INFO L134 LiptonReduction]: Checked pairs total: 22362 [2023-08-26 19:38:21,630 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-26 19:38:21,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 19:38:21,656 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;@536b7b7c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 19:38:21,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-26 19:38:21,657 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 19:38:21,657 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 19:38:21,657 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:38:21,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:21,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 19:38:21,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:21,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:21,661 INFO L85 PathProgramCache]: Analyzing trace with hash 747, now seen corresponding path program 1 times [2023-08-26 19:38:21,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:21,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93246228] [2023-08-26 19:38:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:21,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:21,724 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 19:38:21,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:21,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93246228] [2023-08-26 19:38:21,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93246228] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:21,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:21,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 19:38:21,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659786520] [2023-08-26 19:38:21,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:21,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 19:38:21,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 19:38:21,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 19:38:21,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 291 [2023-08-26 19:38:21,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 140 flow. Second operand has 2 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:21,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:21,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 291 [2023-08-26 19:38:21,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:22,127 INFO L124 PetriNetUnfolderBase]: 3906/6501 cut-off events. [2023-08-26 19:38:22,127 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2023-08-26 19:38:22,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12406 conditions, 6501 events. 3906/6501 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 44291 event pairs, 3906 based on Foata normal form. 0/5330 useless extension candidates. Maximal degree in co-relation 11166. Up to 5730 conditions per place. [2023-08-26 19:38:22,168 INFO L140 encePairwiseOnDemand]: 289/291 looper letters, 41 selfloop transitions, 0 changer transitions 0/59 dead transitions. [2023-08-26 19:38:22,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 218 flow [2023-08-26 19:38:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 19:38:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 19:38:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 331 transitions. [2023-08-26 19:38:22,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687285223367697 [2023-08-26 19:38:22,184 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 331 transitions. [2023-08-26 19:38:22,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 331 transitions. [2023-08-26 19:38:22,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:22,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 331 transitions. [2023-08-26 19:38:22,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 165.5) internal successors, (331), 2 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:22,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:22,195 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:22,196 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 140 flow. Second operand 2 states and 331 transitions. [2023-08-26 19:38:22,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 218 flow [2023-08-26 19:38:22,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 206 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 19:38:22,205 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 124 flow [2023-08-26 19:38:22,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=124, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-26 19:38:22,208 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-08-26 19:38:22,208 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 124 flow [2023-08-26 19:38:22,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:22,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:22,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:38:22,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 19:38:22,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:22,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:22,209 INFO L85 PathProgramCache]: Analyzing trace with hash 738705, now seen corresponding path program 1 times [2023-08-26 19:38:22,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:22,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421174358] [2023-08-26 19:38:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:22,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:22,386 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 19:38:22,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:22,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421174358] [2023-08-26 19:38:22,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421174358] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:22,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:22,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:38:22,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302780912] [2023-08-26 19:38:22,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:22,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:38:22,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:22,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:38:22,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:38:22,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 291 [2023-08-26 19:38:22,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 124 flow. Second operand has 3 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 19:38:22,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:22,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 291 [2023-08-26 19:38:22,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:22,675 INFO L124 PetriNetUnfolderBase]: 3816/6353 cut-off events. [2023-08-26 19:38:22,675 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 19:38:22,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11996 conditions, 6353 events. 3816/6353 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 43082 event pairs, 3816 based on Foata normal form. 0/5240 useless extension candidates. Maximal degree in co-relation 11993. Up to 5583 conditions per place. [2023-08-26 19:38:22,702 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 38 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-26 19:38:22,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 198 flow [2023-08-26 19:38:22,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:38:22,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:38:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-08-26 19:38:22,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4662084765177549 [2023-08-26 19:38:22,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-08-26 19:38:22,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-08-26 19:38:22,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:22,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-08-26 19:38:22,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:22,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:22,707 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:22,707 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 124 flow. Second operand 3 states and 407 transitions. [2023-08-26 19:38:22,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 198 flow [2023-08-26 19:38:22,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:38:22,709 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 122 flow [2023-08-26 19:38:22,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-08-26 19:38:22,709 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-08-26 19:38:22,710 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 122 flow [2023-08-26 19:38:22,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 19:38:22,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:22,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:38:22,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 19:38:22,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:22,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:22,711 INFO L85 PathProgramCache]: Analyzing trace with hash 738704, now seen corresponding path program 1 times [2023-08-26 19:38:22,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:22,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769372453] [2023-08-26 19:38:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:22,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:22,810 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 19:38:22,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:22,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769372453] [2023-08-26 19:38:22,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769372453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:22,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:22,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:38:22,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151827937] [2023-08-26 19:38:22,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:22,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:38:22,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:22,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:38:22,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:38:22,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 291 [2023-08-26 19:38:22,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:22,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:22,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 291 [2023-08-26 19:38:22,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:23,098 INFO L124 PetriNetUnfolderBase]: 3726/6205 cut-off events. [2023-08-26 19:38:23,098 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 19:38:23,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11704 conditions, 6205 events. 3726/6205 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 41897 event pairs, 3726 based on Foata normal form. 0/5150 useless extension candidates. Maximal degree in co-relation 11700. Up to 5437 conditions per place. [2023-08-26 19:38:23,122 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 36 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-26 19:38:23,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 192 flow [2023-08-26 19:38:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:38:23,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:38:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-26 19:38:23,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4536082474226804 [2023-08-26 19:38:23,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-26 19:38:23,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-26 19:38:23,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:23,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-26 19:38:23,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:23,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:23,126 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:23,126 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 122 flow. Second operand 3 states and 396 transitions. [2023-08-26 19:38:23,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 192 flow [2023-08-26 19:38:23,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 55 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:38:23,127 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 119 flow [2023-08-26 19:38:23,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-08-26 19:38:23,128 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -8 predicate places. [2023-08-26 19:38:23,128 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 119 flow [2023-08-26 19:38:23,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:23,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:23,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:38:23,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 19:38:23,129 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:23,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:23,129 INFO L85 PathProgramCache]: Analyzing trace with hash 709915504, now seen corresponding path program 1 times [2023-08-26 19:38:23,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:23,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004603348] [2023-08-26 19:38:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:23,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:23,174 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 19:38:23,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:23,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004603348] [2023-08-26 19:38:23,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004603348] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:23,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:23,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:38:23,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631358913] [2023-08-26 19:38:23,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:23,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:38:23,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:23,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:38:23,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:38:23,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 291 [2023-08-26 19:38:23,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 119 flow. Second operand has 3 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 19:38:23,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:23,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 291 [2023-08-26 19:38:23,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:23,482 INFO L124 PetriNetUnfolderBase]: 3636/6039 cut-off events. [2023-08-26 19:38:23,483 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 19:38:23,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11393 conditions, 6039 events. 3636/6039 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 40678 event pairs, 3636 based on Foata normal form. 0/5049 useless extension candidates. Maximal degree in co-relation 11389. Up to 5291 conditions per place. [2023-08-26 19:38:23,503 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 34 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-26 19:38:23,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 185 flow [2023-08-26 19:38:23,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:38:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:38:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-26 19:38:23,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4616265750286369 [2023-08-26 19:38:23,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-26 19:38:23,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-26 19:38:23,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:23,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-26 19:38:23,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:23,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:23,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:23,508 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 119 flow. Second operand 3 states and 403 transitions. [2023-08-26 19:38:23,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 185 flow [2023-08-26 19:38:23,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:38:23,510 INFO L231 Difference]: Finished difference. Result has 62 places, 53 transitions, 116 flow [2023-08-26 19:38:23,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=62, PETRI_TRANSITIONS=53} [2023-08-26 19:38:23,511 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2023-08-26 19:38:23,511 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 53 transitions, 116 flow [2023-08-26 19:38:23,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 19:38:23,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:23,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:38:23,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 19:38:23,512 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:23,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:23,512 INFO L85 PathProgramCache]: Analyzing trace with hash 709915503, now seen corresponding path program 1 times [2023-08-26 19:38:23,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:23,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510413887] [2023-08-26 19:38:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:23,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:23,564 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 19:38:23,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:23,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510413887] [2023-08-26 19:38:23,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510413887] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:23,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:23,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:38:23,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716367723] [2023-08-26 19:38:23,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:23,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:38:23,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:38:23,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:38:23,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 291 [2023-08-26 19:38:23,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 53 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:23,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:23,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 291 [2023-08-26 19:38:23,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:23,846 INFO L124 PetriNetUnfolderBase]: 3546/5873 cut-off events. [2023-08-26 19:38:23,846 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 19:38:23,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11082 conditions, 5873 events. 3546/5873 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 39420 event pairs, 3546 based on Foata normal form. 0/4948 useless extension candidates. Maximal degree in co-relation 11078. Up to 5145 conditions per place. [2023-08-26 19:38:23,862 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 32 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-26 19:38:23,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 51 transitions, 178 flow [2023-08-26 19:38:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:38:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:38:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-26 19:38:23,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44902634593356244 [2023-08-26 19:38:23,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-26 19:38:23,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-26 19:38:23,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:23,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-26 19:38:23,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:23,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:23,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:23,866 INFO L175 Difference]: Start difference. First operand has 62 places, 53 transitions, 116 flow. Second operand 3 states and 392 transitions. [2023-08-26 19:38:23,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 51 transitions, 178 flow [2023-08-26 19:38:23,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:38:23,867 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 113 flow [2023-08-26 19:38:23,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2023-08-26 19:38:23,867 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -10 predicate places. [2023-08-26 19:38:23,868 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 113 flow [2023-08-26 19:38:23,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:23,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:23,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:23,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 19:38:23,868 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:23,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:23,868 INFO L85 PathProgramCache]: Analyzing trace with hash -670983689, now seen corresponding path program 1 times [2023-08-26 19:38:23,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:23,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56027864] [2023-08-26 19:38:23,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:23,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:23,952 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 19:38:23,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:23,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56027864] [2023-08-26 19:38:23,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56027864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:23,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:23,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 19:38:23,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371388225] [2023-08-26 19:38:23,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:23,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 19:38:23,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:23,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 19:38:23,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 19:38:23,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 291 [2023-08-26 19:38:23,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 114.4) internal successors, (572), 5 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:23,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:23,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 291 [2023-08-26 19:38:23,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:24,158 INFO L124 PetriNetUnfolderBase]: 2664/4490 cut-off events. [2023-08-26 19:38:24,158 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 19:38:24,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8475 conditions, 4490 events. 2664/4490 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 29376 event pairs, 2664 based on Foata normal form. 0/3963 useless extension candidates. Maximal degree in co-relation 8471. Up to 3920 conditions per place. [2023-08-26 19:38:24,173 INFO L140 encePairwiseOnDemand]: 289/291 looper letters, 31 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-26 19:38:24,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 50 transitions, 175 flow [2023-08-26 19:38:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:38:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:38:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-08-26 19:38:24,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261168384879725 [2023-08-26 19:38:24,175 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-08-26 19:38:24,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-08-26 19:38:24,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:24,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-08-26 19:38:24,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:24,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:24,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:24,178 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 113 flow. Second operand 3 states and 372 transitions. [2023-08-26 19:38:24,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 50 transitions, 175 flow [2023-08-26 19:38:24,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 50 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:38:24,179 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 112 flow [2023-08-26 19:38:24,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2023-08-26 19:38:24,179 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -10 predicate places. [2023-08-26 19:38:24,179 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 112 flow [2023-08-26 19:38:24,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.4) internal successors, (572), 5 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:24,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:24,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:24,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 19:38:24,180 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:24,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:24,181 INFO L85 PathProgramCache]: Analyzing trace with hash -670983688, now seen corresponding path program 1 times [2023-08-26 19:38:24,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:24,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585942638] [2023-08-26 19:38:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:24,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:24,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:24,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585942638] [2023-08-26 19:38:24,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585942638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:24,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:24,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:38:24,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132118246] [2023-08-26 19:38:24,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:24,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:38:24,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:38:24,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:38:24,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 291 [2023-08-26 19:38:24,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:24,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:24,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 291 [2023-08-26 19:38:24,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:24,409 INFO L124 PetriNetUnfolderBase]: 1782/3107 cut-off events. [2023-08-26 19:38:24,409 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 19:38:24,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5868 conditions, 3107 events. 1782/3107 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 19513 event pairs, 1782 based on Foata normal form. 0/2985 useless extension candidates. Maximal degree in co-relation 5864. Up to 2695 conditions per place. [2023-08-26 19:38:24,419 INFO L140 encePairwiseOnDemand]: 289/291 looper letters, 30 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-26 19:38:24,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 49 transitions, 172 flow [2023-08-26 19:38:24,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:38:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:38:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-08-26 19:38:24,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558991981672394 [2023-08-26 19:38:24,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-08-26 19:38:24,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-08-26 19:38:24,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:24,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-08-26 19:38:24,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:24,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:24,423 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:24,423 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 112 flow. Second operand 3 states and 398 transitions. [2023-08-26 19:38:24,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 49 transitions, 172 flow [2023-08-26 19:38:24,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 49 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:38:24,424 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 111 flow [2023-08-26 19:38:24,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2023-08-26 19:38:24,424 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -10 predicate places. [2023-08-26 19:38:24,424 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 111 flow [2023-08-26 19:38:24,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:24,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:24,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:24,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 19:38:24,425 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:24,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:24,425 INFO L85 PathProgramCache]: Analyzing trace with hash -378278934, now seen corresponding path program 1 times [2023-08-26 19:38:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:24,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793078902] [2023-08-26 19:38:24,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:24,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:24,749 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 19:38:24,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:24,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793078902] [2023-08-26 19:38:24,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793078902] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:24,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:24,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:38:24,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026911397] [2023-08-26 19:38:24,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:24,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:38:24,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:24,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:38:24,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:38:24,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:38:24,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 111 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:24,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:24,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:38:24,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:25,441 INFO L124 PetriNetUnfolderBase]: 4870/7530 cut-off events. [2023-08-26 19:38:25,441 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-08-26 19:38:25,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15125 conditions, 7530 events. 4870/7530 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 44502 event pairs, 1571 based on Foata normal form. 1/7472 useless extension candidates. Maximal degree in co-relation 15121. Up to 2087 conditions per place. [2023-08-26 19:38:25,462 INFO L140 encePairwiseOnDemand]: 283/291 looper letters, 157 selfloop transitions, 15 changer transitions 25/209 dead transitions. [2023-08-26 19:38:25,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 209 transitions, 851 flow [2023-08-26 19:38:25,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 19:38:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 19:38:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1606 transitions. [2023-08-26 19:38:25,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017182130584192 [2023-08-26 19:38:25,466 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1606 transitions. [2023-08-26 19:38:25,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1606 transitions. [2023-08-26 19:38:25,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:25,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1606 transitions. [2023-08-26 19:38:25,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 146.0) internal successors, (1606), 11 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:25,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:25,472 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:25,472 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 111 flow. Second operand 11 states and 1606 transitions. [2023-08-26 19:38:25,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 209 transitions, 851 flow [2023-08-26 19:38:25,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 209 transitions, 850 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:38:25,474 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 202 flow [2023-08-26 19:38:25,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=202, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-08-26 19:38:25,475 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-08-26 19:38:25,475 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 202 flow [2023-08-26 19:38:25,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:25,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:25,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:25,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 19:38:25,476 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:25,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:25,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1629220308, now seen corresponding path program 2 times [2023-08-26 19:38:25,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:25,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890669658] [2023-08-26 19:38:25,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:25,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:25,856 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 19:38:25,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:25,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890669658] [2023-08-26 19:38:25,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890669658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:25,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:25,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:38:25,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011342172] [2023-08-26 19:38:25,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:25,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:38:25,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:25,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:38:25,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:38:25,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:38:25,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 202 flow. Second operand has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:25,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:25,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:38:25,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:27,032 INFO L124 PetriNetUnfolderBase]: 11407/19558 cut-off events. [2023-08-26 19:38:27,032 INFO L125 PetriNetUnfolderBase]: For 358/366 co-relation queries the response was YES. [2023-08-26 19:38:27,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39511 conditions, 19558 events. 11407/19558 cut-off events. For 358/366 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 153508 event pairs, 2698 based on Foata normal form. 202/19361 useless extension candidates. Maximal degree in co-relation 39503. Up to 7450 conditions per place. [2023-08-26 19:38:27,106 INFO L140 encePairwiseOnDemand]: 277/291 looper letters, 134 selfloop transitions, 37 changer transitions 4/203 dead transitions. [2023-08-26 19:38:27,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 203 transitions, 836 flow [2023-08-26 19:38:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 19:38:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 19:38:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1330 transitions. [2023-08-26 19:38:27,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078274150439099 [2023-08-26 19:38:27,110 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1330 transitions. [2023-08-26 19:38:27,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1330 transitions. [2023-08-26 19:38:27,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:27,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1330 transitions. [2023-08-26 19:38:27,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 147.77777777777777) internal successors, (1330), 9 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:27,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:27,115 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:27,115 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 202 flow. Second operand 9 states and 1330 transitions. [2023-08-26 19:38:27,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 203 transitions, 836 flow [2023-08-26 19:38:27,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 203 transitions, 834 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 19:38:27,125 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 466 flow [2023-08-26 19:38:27,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=466, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2023-08-26 19:38:27,125 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2023-08-26 19:38:27,126 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 466 flow [2023-08-26 19:38:27,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:27,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:27,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:27,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 19:38:27,126 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:27,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash -394323216, now seen corresponding path program 3 times [2023-08-26 19:38:27,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:27,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619045706] [2023-08-26 19:38:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:27,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:27,247 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 19:38:27,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:27,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619045706] [2023-08-26 19:38:27,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619045706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:27,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:27,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 19:38:27,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751453887] [2023-08-26 19:38:27,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:27,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:38:27,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:27,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:38:27,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:38:27,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 291 [2023-08-26 19:38:27,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 466 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:27,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:27,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 291 [2023-08-26 19:38:27,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:28,125 INFO L124 PetriNetUnfolderBase]: 8244/14449 cut-off events. [2023-08-26 19:38:28,126 INFO L125 PetriNetUnfolderBase]: For 10212/10675 co-relation queries the response was YES. [2023-08-26 19:38:28,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37994 conditions, 14449 events. 8244/14449 cut-off events. For 10212/10675 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 111380 event pairs, 5337 based on Foata normal form. 432/14199 useless extension candidates. Maximal degree in co-relation 37979. Up to 10630 conditions per place. [2023-08-26 19:38:28,311 INFO L140 encePairwiseOnDemand]: 287/291 looper letters, 84 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2023-08-26 19:38:28,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 131 transitions, 762 flow [2023-08-26 19:38:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:38:28,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:38:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-26 19:38:28,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349369988545246 [2023-08-26 19:38:28,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-26 19:38:28,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-26 19:38:28,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:28,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-26 19:38:28,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:28,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:28,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:28,314 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 466 flow. Second operand 3 states and 467 transitions. [2023-08-26 19:38:28,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 131 transitions, 762 flow [2023-08-26 19:38:28,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 131 transitions, 762 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:38:28,345 INFO L231 Difference]: Finished difference. Result has 90 places, 103 transitions, 470 flow [2023-08-26 19:38:28,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=470, PETRI_PLACES=90, PETRI_TRANSITIONS=103} [2023-08-26 19:38:28,347 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 19 predicate places. [2023-08-26 19:38:28,347 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 103 transitions, 470 flow [2023-08-26 19:38:28,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:28,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:28,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:28,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 19:38:28,348 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:28,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:28,349 INFO L85 PathProgramCache]: Analyzing trace with hash 77804160, now seen corresponding path program 4 times [2023-08-26 19:38:28,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:28,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932664151] [2023-08-26 19:38:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:28,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:28,440 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 19:38:28,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:28,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932664151] [2023-08-26 19:38:28,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932664151] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:28,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:28,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 19:38:28,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78341325] [2023-08-26 19:38:28,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:28,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:38:28,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:38:28,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:38:28,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 291 [2023-08-26 19:38:28,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 103 transitions, 470 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:28,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:28,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 291 [2023-08-26 19:38:28,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:29,404 INFO L124 PetriNetUnfolderBase]: 8496/15010 cut-off events. [2023-08-26 19:38:29,405 INFO L125 PetriNetUnfolderBase]: For 11356/11897 co-relation queries the response was YES. [2023-08-26 19:38:29,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40349 conditions, 15010 events. 8496/15010 cut-off events. For 11356/11897 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 116221 event pairs, 5476 based on Foata normal form. 400/14660 useless extension candidates. Maximal degree in co-relation 40332. Up to 11054 conditions per place. [2023-08-26 19:38:29,464 INFO L140 encePairwiseOnDemand]: 287/291 looper letters, 81 selfloop transitions, 2 changer transitions 1/129 dead transitions. [2023-08-26 19:38:29,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 129 transitions, 752 flow [2023-08-26 19:38:29,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:38:29,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:38:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-26 19:38:29,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349369988545246 [2023-08-26 19:38:29,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-26 19:38:29,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-26 19:38:29,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:29,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-26 19:38:29,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:29,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:29,469 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:29,469 INFO L175 Difference]: Start difference. First operand has 90 places, 103 transitions, 470 flow. Second operand 3 states and 467 transitions. [2023-08-26 19:38:29,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 129 transitions, 752 flow [2023-08-26 19:38:29,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 129 transitions, 748 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:38:29,499 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 476 flow [2023-08-26 19:38:29,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=476, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2023-08-26 19:38:29,499 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2023-08-26 19:38:29,500 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 476 flow [2023-08-26 19:38:29,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:29,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:29,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:29,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 19:38:29,500 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:29,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:29,501 INFO L85 PathProgramCache]: Analyzing trace with hash 70933454, now seen corresponding path program 5 times [2023-08-26 19:38:29,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:29,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356959387] [2023-08-26 19:38:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:29,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:29,589 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 19:38:29,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:29,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356959387] [2023-08-26 19:38:29,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356959387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:29,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:29,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 19:38:29,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577039533] [2023-08-26 19:38:29,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:29,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:38:29,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:38:29,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:38:29,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 291 [2023-08-26 19:38:29,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 476 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:29,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:29,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 291 [2023-08-26 19:38:29,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:30,658 INFO L124 PetriNetUnfolderBase]: 8878/16225 cut-off events. [2023-08-26 19:38:30,658 INFO L125 PetriNetUnfolderBase]: For 13118/13633 co-relation queries the response was YES. [2023-08-26 19:38:30,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43990 conditions, 16225 events. 8878/16225 cut-off events. For 13118/13633 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 132609 event pairs, 5933 based on Foata normal form. 442/15969 useless extension candidates. Maximal degree in co-relation 43972. Up to 10872 conditions per place. [2023-08-26 19:38:30,732 INFO L140 encePairwiseOnDemand]: 287/291 looper letters, 84 selfloop transitions, 2 changer transitions 1/132 dead transitions. [2023-08-26 19:38:30,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 132 transitions, 780 flow [2023-08-26 19:38:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:38:30,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:38:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-26 19:38:30,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349369988545246 [2023-08-26 19:38:30,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-26 19:38:30,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-26 19:38:30,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:30,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-26 19:38:30,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:30,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:30,736 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:30,736 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 476 flow. Second operand 3 states and 467 transitions. [2023-08-26 19:38:30,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 132 transitions, 780 flow [2023-08-26 19:38:30,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 132 transitions, 776 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:38:30,791 INFO L231 Difference]: Finished difference. Result has 92 places, 103 transitions, 482 flow [2023-08-26 19:38:30,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=92, PETRI_TRANSITIONS=103} [2023-08-26 19:38:30,791 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 21 predicate places. [2023-08-26 19:38:30,791 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 103 transitions, 482 flow [2023-08-26 19:38:30,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:30,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:30,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:30,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 19:38:30,792 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:30,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:30,792 INFO L85 PathProgramCache]: Analyzing trace with hash 144769190, now seen corresponding path program 6 times [2023-08-26 19:38:30,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:30,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329438511] [2023-08-26 19:38:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:30,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:31,001 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 19:38:31,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:31,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329438511] [2023-08-26 19:38:31,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329438511] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:31,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:31,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:38:31,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554876638] [2023-08-26 19:38:31,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:31,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:38:31,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:31,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:38:31,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:38:31,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:38:31,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 103 transitions, 482 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:31,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:31,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:38:31,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:32,991 INFO L124 PetriNetUnfolderBase]: 16747/25770 cut-off events. [2023-08-26 19:38:32,991 INFO L125 PetriNetUnfolderBase]: For 21424/22144 co-relation queries the response was YES. [2023-08-26 19:38:33,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76663 conditions, 25770 events. 16747/25770 cut-off events. For 21424/22144 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 175273 event pairs, 5651 based on Foata normal form. 460/25795 useless extension candidates. Maximal degree in co-relation 76644. Up to 7840 conditions per place. [2023-08-26 19:38:33,086 INFO L140 encePairwiseOnDemand]: 283/291 looper letters, 243 selfloop transitions, 21 changer transitions 29/318 dead transitions. [2023-08-26 19:38:33,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 318 transitions, 1986 flow [2023-08-26 19:38:33,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 19:38:33,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 19:38:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1602 transitions. [2023-08-26 19:38:33,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5004686035613871 [2023-08-26 19:38:33,089 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1602 transitions. [2023-08-26 19:38:33,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1602 transitions. [2023-08-26 19:38:33,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:33,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1602 transitions. [2023-08-26 19:38:33,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 145.63636363636363) internal successors, (1602), 11 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:33,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:33,095 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:33,095 INFO L175 Difference]: Start difference. First operand has 92 places, 103 transitions, 482 flow. Second operand 11 states and 1602 transitions. [2023-08-26 19:38:33,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 318 transitions, 1986 flow [2023-08-26 19:38:33,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 318 transitions, 1982 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:38:33,148 INFO L231 Difference]: Finished difference. Result has 105 places, 112 transitions, 596 flow [2023-08-26 19:38:33,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=596, PETRI_PLACES=105, PETRI_TRANSITIONS=112} [2023-08-26 19:38:33,149 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 34 predicate places. [2023-08-26 19:38:33,149 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 112 transitions, 596 flow [2023-08-26 19:38:33,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:33,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:33,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:33,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 19:38:33,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:33,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash 982264808, now seen corresponding path program 7 times [2023-08-26 19:38:33,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:33,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540261628] [2023-08-26 19:38:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:33,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:33,424 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 19:38:33,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:33,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540261628] [2023-08-26 19:38:33,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540261628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:33,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:33,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 19:38:33,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426049691] [2023-08-26 19:38:33,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:33,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:38:33,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:33,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:38:33,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:38:33,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:38:33,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 112 transitions, 596 flow. Second operand has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:33,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:33,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:38:33,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:35,297 INFO L124 PetriNetUnfolderBase]: 13114/23167 cut-off events. [2023-08-26 19:38:35,297 INFO L125 PetriNetUnfolderBase]: For 21881/22204 co-relation queries the response was YES. [2023-08-26 19:38:35,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68077 conditions, 23167 events. 13114/23167 cut-off events. For 21881/22204 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 186749 event pairs, 6785 based on Foata normal form. 225/22677 useless extension candidates. Maximal degree in co-relation 68053. Up to 15911 conditions per place. [2023-08-26 19:38:35,384 INFO L140 encePairwiseOnDemand]: 280/291 looper letters, 133 selfloop transitions, 28 changer transitions 0/198 dead transitions. [2023-08-26 19:38:35,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 198 transitions, 1296 flow [2023-08-26 19:38:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 19:38:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 19:38:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1001 transitions. [2023-08-26 19:38:35,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49140893470790376 [2023-08-26 19:38:35,387 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1001 transitions. [2023-08-26 19:38:35,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1001 transitions. [2023-08-26 19:38:35,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:35,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1001 transitions. [2023-08-26 19:38:35,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:35,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 291.0) internal successors, (2328), 8 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:35,390 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 291.0) internal successors, (2328), 8 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:35,390 INFO L175 Difference]: Start difference. First operand has 105 places, 112 transitions, 596 flow. Second operand 7 states and 1001 transitions. [2023-08-26 19:38:35,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 198 transitions, 1296 flow [2023-08-26 19:38:35,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 198 transitions, 1279 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-26 19:38:35,489 INFO L231 Difference]: Finished difference. Result has 109 places, 139 transitions, 838 flow [2023-08-26 19:38:35,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=838, PETRI_PLACES=109, PETRI_TRANSITIONS=139} [2023-08-26 19:38:35,490 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 38 predicate places. [2023-08-26 19:38:35,490 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 139 transitions, 838 flow [2023-08-26 19:38:35,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:35,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:35,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:35,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 19:38:35,491 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:35,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:35,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2144438734, now seen corresponding path program 8 times [2023-08-26 19:38:35,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:35,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102724202] [2023-08-26 19:38:35,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:35,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:35,672 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 19:38:35,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:35,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102724202] [2023-08-26 19:38:35,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102724202] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:35,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:35,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:38:35,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546563952] [2023-08-26 19:38:35,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:35,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:38:35,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:35,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:38:35,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:38:35,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:38:35,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 139 transitions, 838 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:35,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:35,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:38:35,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:38,635 INFO L124 PetriNetUnfolderBase]: 21438/33060 cut-off events. [2023-08-26 19:38:38,635 INFO L125 PetriNetUnfolderBase]: For 45202/46999 co-relation queries the response was YES. [2023-08-26 19:38:38,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108493 conditions, 33060 events. 21438/33060 cut-off events. For 45202/46999 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 230700 event pairs, 8329 based on Foata normal form. 862/33406 useless extension candidates. Maximal degree in co-relation 108466. Up to 11891 conditions per place. [2023-08-26 19:38:38,779 INFO L140 encePairwiseOnDemand]: 283/291 looper letters, 258 selfloop transitions, 25 changer transitions 29/344 dead transitions. [2023-08-26 19:38:38,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 344 transitions, 2485 flow [2023-08-26 19:38:38,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 19:38:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 19:38:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1590 transitions. [2023-08-26 19:38:38,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967197750702905 [2023-08-26 19:38:38,782 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1590 transitions. [2023-08-26 19:38:38,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1590 transitions. [2023-08-26 19:38:38,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:38,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1590 transitions. [2023-08-26 19:38:38,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 144.54545454545453) internal successors, (1590), 11 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:38,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:38,788 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:38,788 INFO L175 Difference]: Start difference. First operand has 109 places, 139 transitions, 838 flow. Second operand 11 states and 1590 transitions. [2023-08-26 19:38:38,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 344 transitions, 2485 flow [2023-08-26 19:38:39,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 344 transitions, 2483 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 19:38:39,042 INFO L231 Difference]: Finished difference. Result has 124 places, 154 transitions, 1017 flow [2023-08-26 19:38:39,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1017, PETRI_PLACES=124, PETRI_TRANSITIONS=154} [2023-08-26 19:38:39,043 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 53 predicate places. [2023-08-26 19:38:39,043 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 154 transitions, 1017 flow [2023-08-26 19:38:39,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:39,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:39,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:39,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 19:38:39,044 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:39,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:39,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1858557954, now seen corresponding path program 9 times [2023-08-26 19:38:39,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:39,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896008492] [2023-08-26 19:38:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:39,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:39,334 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 19:38:39,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:39,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896008492] [2023-08-26 19:38:39,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896008492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:39,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:39,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 19:38:39,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766570252] [2023-08-26 19:38:39,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:39,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:38:39,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:39,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:38:39,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:38:39,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:38:39,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 154 transitions, 1017 flow. Second operand has 6 states, 6 states have (on average 134.16666666666666) internal successors, (805), 6 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:39,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:39,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:38:39,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:41,608 INFO L124 PetriNetUnfolderBase]: 14448/26371 cut-off events. [2023-08-26 19:38:41,608 INFO L125 PetriNetUnfolderBase]: For 39112/39548 co-relation queries the response was YES. [2023-08-26 19:38:41,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87519 conditions, 26371 events. 14448/26371 cut-off events. For 39112/39548 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 224409 event pairs, 6195 based on Foata normal form. 148/25708 useless extension candidates. Maximal degree in co-relation 87486. Up to 20095 conditions per place. [2023-08-26 19:38:41,738 INFO L140 encePairwiseOnDemand]: 280/291 looper letters, 144 selfloop transitions, 24 changer transitions 0/220 dead transitions. [2023-08-26 19:38:41,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 220 transitions, 1658 flow [2023-08-26 19:38:41,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 19:38:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 19:38:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 867 transitions. [2023-08-26 19:38:41,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965635738831615 [2023-08-26 19:38:41,740 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 867 transitions. [2023-08-26 19:38:41,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 867 transitions. [2023-08-26 19:38:41,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:41,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 867 transitions. [2023-08-26 19:38:41,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.5) internal successors, (867), 6 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:41,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:41,743 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:41,743 INFO L175 Difference]: Start difference. First operand has 124 places, 154 transitions, 1017 flow. Second operand 6 states and 867 transitions. [2023-08-26 19:38:41,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 220 transitions, 1658 flow [2023-08-26 19:38:42,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 220 transitions, 1638 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-26 19:38:42,060 INFO L231 Difference]: Finished difference. Result has 130 places, 177 transitions, 1254 flow [2023-08-26 19:38:42,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1254, PETRI_PLACES=130, PETRI_TRANSITIONS=177} [2023-08-26 19:38:42,061 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 59 predicate places. [2023-08-26 19:38:42,061 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 177 transitions, 1254 flow [2023-08-26 19:38:42,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.16666666666666) internal successors, (805), 6 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:42,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:42,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:42,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 19:38:42,061 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:42,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:42,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1222950790, now seen corresponding path program 10 times [2023-08-26 19:38:42,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:42,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709906020] [2023-08-26 19:38:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:42,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:42,508 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 19:38:42,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:42,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709906020] [2023-08-26 19:38:42,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709906020] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:42,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:42,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 19:38:42,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488846477] [2023-08-26 19:38:42,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:42,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:38:42,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:42,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:38:42,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:38:42,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:38:42,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 177 transitions, 1254 flow. Second operand has 6 states, 6 states have (on average 134.16666666666666) internal successors, (805), 6 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:42,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:42,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:38:42,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:45,315 INFO L124 PetriNetUnfolderBase]: 16520/30247 cut-off events. [2023-08-26 19:38:45,315 INFO L125 PetriNetUnfolderBase]: For 60967/61332 co-relation queries the response was YES. [2023-08-26 19:38:45,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107189 conditions, 30247 events. 16520/30247 cut-off events. For 60967/61332 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 263679 event pairs, 6415 based on Foata normal form. 248/29854 useless extension candidates. Maximal degree in co-relation 107152. Up to 20282 conditions per place. [2023-08-26 19:38:45,471 INFO L140 encePairwiseOnDemand]: 281/291 looper letters, 180 selfloop transitions, 28 changer transitions 2/262 dead transitions. [2023-08-26 19:38:45,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 262 transitions, 2127 flow [2023-08-26 19:38:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 19:38:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 19:38:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 877 transitions. [2023-08-26 19:38:45,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502290950744559 [2023-08-26 19:38:45,473 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 877 transitions. [2023-08-26 19:38:45,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 877 transitions. [2023-08-26 19:38:45,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:45,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 877 transitions. [2023-08-26 19:38:45,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.16666666666666) internal successors, (877), 6 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:45,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:45,477 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:45,477 INFO L175 Difference]: Start difference. First operand has 130 places, 177 transitions, 1254 flow. Second operand 6 states and 877 transitions. [2023-08-26 19:38:45,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 262 transitions, 2127 flow [2023-08-26 19:38:45,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 262 transitions, 2085 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-08-26 19:38:45,962 INFO L231 Difference]: Finished difference. Result has 137 places, 192 transitions, 1419 flow [2023-08-26 19:38:45,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1419, PETRI_PLACES=137, PETRI_TRANSITIONS=192} [2023-08-26 19:38:45,962 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 66 predicate places. [2023-08-26 19:38:45,963 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 192 transitions, 1419 flow [2023-08-26 19:38:45,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.16666666666666) internal successors, (805), 6 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:45,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:45,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:45,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 19:38:45,963 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:45,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:45,963 INFO L85 PathProgramCache]: Analyzing trace with hash 301152816, now seen corresponding path program 11 times [2023-08-26 19:38:45,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:45,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545603402] [2023-08-26 19:38:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:45,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:46,341 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 19:38:46,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:46,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545603402] [2023-08-26 19:38:46,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545603402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:46,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:46,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 19:38:46,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202791506] [2023-08-26 19:38:46,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:46,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:38:46,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:46,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:38:46,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:38:46,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:38:46,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 192 transitions, 1419 flow. Second operand has 6 states, 6 states have (on average 134.16666666666666) internal successors, (805), 6 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:46,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:46,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:38:46,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:49,480 INFO L124 PetriNetUnfolderBase]: 18768/33737 cut-off events. [2023-08-26 19:38:49,480 INFO L125 PetriNetUnfolderBase]: For 76330/77035 co-relation queries the response was YES. [2023-08-26 19:38:49,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122410 conditions, 33737 events. 18768/33737 cut-off events. For 76330/77035 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 290453 event pairs, 7895 based on Foata normal form. 372/33198 useless extension candidates. Maximal degree in co-relation 122370. Up to 13493 conditions per place. [2023-08-26 19:38:49,843 INFO L140 encePairwiseOnDemand]: 281/291 looper letters, 205 selfloop transitions, 51 changer transitions 2/310 dead transitions. [2023-08-26 19:38:49,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 310 transitions, 2678 flow [2023-08-26 19:38:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 19:38:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 19:38:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 892 transitions. [2023-08-26 19:38:49,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108820160366552 [2023-08-26 19:38:49,845 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 892 transitions. [2023-08-26 19:38:49,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 892 transitions. [2023-08-26 19:38:49,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:49,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 892 transitions. [2023-08-26 19:38:49,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.66666666666666) internal successors, (892), 6 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:49,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:49,848 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:49,848 INFO L175 Difference]: Start difference. First operand has 137 places, 192 transitions, 1419 flow. Second operand 6 states and 892 transitions. [2023-08-26 19:38:49,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 310 transitions, 2678 flow [2023-08-26 19:38:50,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 310 transitions, 2638 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-26 19:38:50,439 INFO L231 Difference]: Finished difference. Result has 143 places, 212 transitions, 1770 flow [2023-08-26 19:38:50,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1770, PETRI_PLACES=143, PETRI_TRANSITIONS=212} [2023-08-26 19:38:50,439 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 72 predicate places. [2023-08-26 19:38:50,439 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 212 transitions, 1770 flow [2023-08-26 19:38:50,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.16666666666666) internal successors, (805), 6 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:50,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:50,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:50,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 19:38:50,440 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:50,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:50,440 INFO L85 PathProgramCache]: Analyzing trace with hash -749460694, now seen corresponding path program 12 times [2023-08-26 19:38:50,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:50,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701556028] [2023-08-26 19:38:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:50,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:51,012 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 19:38:51,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:51,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701556028] [2023-08-26 19:38:51,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701556028] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:51,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:51,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 19:38:51,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620327820] [2023-08-26 19:38:51,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:51,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 19:38:51,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:51,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 19:38:51,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-26 19:38:51,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:38:51,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 212 transitions, 1770 flow. Second operand has 10 states, 10 states have (on average 131.7) internal successors, (1317), 10 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:51,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:51,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:38:51,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:56,169 INFO L124 PetriNetUnfolderBase]: 27224/49445 cut-off events. [2023-08-26 19:38:56,169 INFO L125 PetriNetUnfolderBase]: For 147269/148603 co-relation queries the response was YES. [2023-08-26 19:38:56,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189986 conditions, 49445 events. 27224/49445 cut-off events. For 147269/148603 co-relation queries the response was YES. Maximal size of possible extension queue 1498. Compared 457253 event pairs, 11095 based on Foata normal form. 508/48681 useless extension candidates. Maximal degree in co-relation 189942. Up to 27387 conditions per place. [2023-08-26 19:38:56,555 INFO L140 encePairwiseOnDemand]: 276/291 looper letters, 274 selfloop transitions, 64 changer transitions 14/404 dead transitions. [2023-08-26 19:38:56,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 404 transitions, 3780 flow [2023-08-26 19:38:56,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 19:38:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 19:38:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1460 transitions. [2023-08-26 19:38:56,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017182130584192 [2023-08-26 19:38:56,558 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1460 transitions. [2023-08-26 19:38:56,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1460 transitions. [2023-08-26 19:38:56,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:56,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1460 transitions. [2023-08-26 19:38:56,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 146.0) internal successors, (1460), 10 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:56,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 291.0) internal successors, (3201), 11 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:56,563 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 291.0) internal successors, (3201), 11 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:56,563 INFO L175 Difference]: Start difference. First operand has 143 places, 212 transitions, 1770 flow. Second operand 10 states and 1460 transitions. [2023-08-26 19:38:56,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 404 transitions, 3780 flow [2023-08-26 19:38:57,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 404 transitions, 3780 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:38:57,855 INFO L231 Difference]: Finished difference. Result has 160 places, 254 transitions, 2456 flow [2023-08-26 19:38:57,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2456, PETRI_PLACES=160, PETRI_TRANSITIONS=254} [2023-08-26 19:38:57,856 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 89 predicate places. [2023-08-26 19:38:57,856 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 254 transitions, 2456 flow [2023-08-26 19:38:57,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 131.7) internal successors, (1317), 10 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:57,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:57,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:57,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 19:38:57,856 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:38:57,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:57,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1991546796, now seen corresponding path program 13 times [2023-08-26 19:38:57,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:57,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300040973] [2023-08-26 19:38:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:57,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:58,143 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 19:38:58,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:58,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300040973] [2023-08-26 19:38:58,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300040973] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:38:58,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:38:58,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 19:38:58,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422091241] [2023-08-26 19:38:58,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:38:58,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:38:58,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:38:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:38:58,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:38:58,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 254 transitions, 2456 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:58,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:58,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:38:58,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:04,666 INFO L124 PetriNetUnfolderBase]: 28660/53813 cut-off events. [2023-08-26 19:39:04,666 INFO L125 PetriNetUnfolderBase]: For 218657/219951 co-relation queries the response was YES. [2023-08-26 19:39:04,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221152 conditions, 53813 events. 28660/53813 cut-off events. For 218657/219951 co-relation queries the response was YES. Maximal size of possible extension queue 1653. Compared 516635 event pairs, 9569 based on Foata normal form. 716/53684 useless extension candidates. Maximal degree in co-relation 221099. Up to 25075 conditions per place. [2023-08-26 19:39:05,112 INFO L140 encePairwiseOnDemand]: 278/291 looper letters, 283 selfloop transitions, 116 changer transitions 18/469 dead transitions. [2023-08-26 19:39:05,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 469 transitions, 4915 flow [2023-08-26 19:39:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 19:39:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 19:39:05,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1607 transitions. [2023-08-26 19:39:05,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020306154326772 [2023-08-26 19:39:05,117 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1607 transitions. [2023-08-26 19:39:05,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1607 transitions. [2023-08-26 19:39:05,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:39:05,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1607 transitions. [2023-08-26 19:39:05,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 146.0909090909091) internal successors, (1607), 11 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:05,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:05,121 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:05,121 INFO L175 Difference]: Start difference. First operand has 160 places, 254 transitions, 2456 flow. Second operand 11 states and 1607 transitions. [2023-08-26 19:39:05,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 469 transitions, 4915 flow [2023-08-26 19:39:06,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 469 transitions, 4849 flow, removed 33 selfloop flow, removed 0 redundant places. [2023-08-26 19:39:06,952 INFO L231 Difference]: Finished difference. Result has 177 places, 306 transitions, 3446 flow [2023-08-26 19:39:06,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=2402, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3446, PETRI_PLACES=177, PETRI_TRANSITIONS=306} [2023-08-26 19:39:06,953 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 106 predicate places. [2023-08-26 19:39:06,953 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 306 transitions, 3446 flow [2023-08-26 19:39:06,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:06,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:39:06,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:39:06,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 19:39:06,954 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:39:06,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:39:06,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1571889872, now seen corresponding path program 14 times [2023-08-26 19:39:06,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:39:06,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250744236] [2023-08-26 19:39:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:39:06,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:39:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:07,435 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 19:39:07,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:39:07,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250744236] [2023-08-26 19:39:07,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250744236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:39:07,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:39:07,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:39:07,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503517694] [2023-08-26 19:39:07,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:39:07,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:39:07,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:39:07,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:39:07,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:39:07,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:39:07,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 306 transitions, 3446 flow. Second operand has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:07,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:39:07,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:39:07,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:14,229 INFO L124 PetriNetUnfolderBase]: 27940/52062 cut-off events. [2023-08-26 19:39:14,229 INFO L125 PetriNetUnfolderBase]: For 284468/287603 co-relation queries the response was YES. [2023-08-26 19:39:14,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229774 conditions, 52062 events. 27940/52062 cut-off events. For 284468/287603 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 492452 event pairs, 14961 based on Foata normal form. 200/51128 useless extension candidates. Maximal degree in co-relation 229713. Up to 43328 conditions per place. [2023-08-26 19:39:14,685 INFO L140 encePairwiseOnDemand]: 282/291 looper letters, 280 selfloop transitions, 21 changer transitions 0/353 dead transitions. [2023-08-26 19:39:14,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 353 transitions, 4421 flow [2023-08-26 19:39:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 19:39:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 19:39:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 857 transitions. [2023-08-26 19:39:14,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490836197021764 [2023-08-26 19:39:14,686 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 857 transitions. [2023-08-26 19:39:14,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 857 transitions. [2023-08-26 19:39:14,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:39:14,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 857 transitions. [2023-08-26 19:39:14,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 142.83333333333334) internal successors, (857), 6 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:14,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:14,689 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:14,689 INFO L175 Difference]: Start difference. First operand has 177 places, 306 transitions, 3446 flow. Second operand 6 states and 857 transitions. [2023-08-26 19:39:14,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 353 transitions, 4421 flow [2023-08-26 19:39:16,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 353 transitions, 4271 flow, removed 75 selfloop flow, removed 0 redundant places. [2023-08-26 19:39:16,940 INFO L231 Difference]: Finished difference. Result has 183 places, 315 transitions, 3499 flow [2023-08-26 19:39:16,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=3304, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3499, PETRI_PLACES=183, PETRI_TRANSITIONS=315} [2023-08-26 19:39:16,941 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 112 predicate places. [2023-08-26 19:39:16,941 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 315 transitions, 3499 flow [2023-08-26 19:39:16,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:16,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:39:16,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:39:16,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 19:39:16,942 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:39:16,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:39:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash 836937062, now seen corresponding path program 15 times [2023-08-26 19:39:16,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:39:16,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899367864] [2023-08-26 19:39:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:39:16,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:39:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:17,200 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 19:39:17,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:39:17,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899367864] [2023-08-26 19:39:17,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899367864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:39:17,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:39:17,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 19:39:17,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164988677] [2023-08-26 19:39:17,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:39:17,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:39:17,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:39:17,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:39:17,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:39:17,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:39:17,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 315 transitions, 3499 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:17,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:39:17,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:39:17,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:26,873 INFO L124 PetriNetUnfolderBase]: 39155/73134 cut-off events. [2023-08-26 19:39:26,873 INFO L125 PetriNetUnfolderBase]: For 390839/395760 co-relation queries the response was YES. [2023-08-26 19:39:27,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315331 conditions, 73134 events. 39155/73134 cut-off events. For 390839/395760 co-relation queries the response was YES. Maximal size of possible extension queue 2176. Compared 726898 event pairs, 12604 based on Foata normal form. 1299/73076 useless extension candidates. Maximal degree in co-relation 315267. Up to 14079 conditions per place. [2023-08-26 19:39:27,610 INFO L140 encePairwiseOnDemand]: 279/291 looper letters, 405 selfloop transitions, 181 changer transitions 25/663 dead transitions. [2023-08-26 19:39:27,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 663 transitions, 8219 flow [2023-08-26 19:39:27,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 19:39:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 19:39:27,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1632 transitions. [2023-08-26 19:39:27,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098406747891284 [2023-08-26 19:39:27,612 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1632 transitions. [2023-08-26 19:39:27,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1632 transitions. [2023-08-26 19:39:27,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:39:27,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1632 transitions. [2023-08-26 19:39:27,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 148.36363636363637) internal successors, (1632), 11 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:27,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:27,616 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:27,616 INFO L175 Difference]: Start difference. First operand has 183 places, 315 transitions, 3499 flow. Second operand 11 states and 1632 transitions. [2023-08-26 19:39:27,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 663 transitions, 8219 flow [2023-08-26 19:39:30,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 663 transitions, 8102 flow, removed 48 selfloop flow, removed 2 redundant places. [2023-08-26 19:39:30,439 INFO L231 Difference]: Finished difference. Result has 200 places, 432 transitions, 5827 flow [2023-08-26 19:39:30,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=3439, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5827, PETRI_PLACES=200, PETRI_TRANSITIONS=432} [2023-08-26 19:39:30,439 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 129 predicate places. [2023-08-26 19:39:30,439 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 432 transitions, 5827 flow [2023-08-26 19:39:30,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:30,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:39:30,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:39:30,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 19:39:30,440 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:39:30,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:39:30,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1079018060, now seen corresponding path program 16 times [2023-08-26 19:39:30,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:39:30,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275401588] [2023-08-26 19:39:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:39:30,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:39:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:30,731 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 19:39:30,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:39:30,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275401588] [2023-08-26 19:39:30,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275401588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:39:30,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:39:30,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 19:39:30,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54581199] [2023-08-26 19:39:30,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:39:30,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:39:30,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:39:30,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:39:30,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:39:30,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:39:30,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 432 transitions, 5827 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:30,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:39:30,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:39:30,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:42,188 INFO L124 PetriNetUnfolderBase]: 38358/72034 cut-off events. [2023-08-26 19:39:42,188 INFO L125 PetriNetUnfolderBase]: For 545985/550407 co-relation queries the response was YES. [2023-08-26 19:39:42,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336612 conditions, 72034 events. 38358/72034 cut-off events. For 545985/550407 co-relation queries the response was YES. Maximal size of possible extension queue 2070. Compared 719082 event pairs, 13135 based on Foata normal form. 1482/72558 useless extension candidates. Maximal degree in co-relation 336539. Up to 16149 conditions per place. [2023-08-26 19:39:42,972 INFO L140 encePairwiseOnDemand]: 275/291 looper letters, 422 selfloop transitions, 322 changer transitions 17/813 dead transitions. [2023-08-26 19:39:42,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 813 transitions, 11863 flow [2023-08-26 19:39:42,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 19:39:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 19:39:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2451 transitions. [2023-08-26 19:39:42,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954517889630079 [2023-08-26 19:39:42,974 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2451 transitions. [2023-08-26 19:39:42,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2451 transitions. [2023-08-26 19:39:42,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:39:42,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2451 transitions. [2023-08-26 19:39:42,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 144.1764705882353) internal successors, (2451), 17 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:42,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 291.0) internal successors, (5238), 18 states have internal predecessors, (5238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:42,980 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 291.0) internal successors, (5238), 18 states have internal predecessors, (5238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:42,980 INFO L175 Difference]: Start difference. First operand has 200 places, 432 transitions, 5827 flow. Second operand 17 states and 2451 transitions. [2023-08-26 19:39:42,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 813 transitions, 11863 flow [2023-08-26 19:39:47,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 813 transitions, 11690 flow, removed 86 selfloop flow, removed 1 redundant places. [2023-08-26 19:39:47,442 INFO L231 Difference]: Finished difference. Result has 229 places, 599 transitions, 9572 flow [2023-08-26 19:39:47,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=5566, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9572, PETRI_PLACES=229, PETRI_TRANSITIONS=599} [2023-08-26 19:39:47,442 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 158 predicate places. [2023-08-26 19:39:47,442 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 599 transitions, 9572 flow [2023-08-26 19:39:47,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:47,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:39:47,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:39:47,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 19:39:47,443 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:39:47,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:39:47,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1157750274, now seen corresponding path program 17 times [2023-08-26 19:39:47,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:39:47,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608281626] [2023-08-26 19:39:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:39:47,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:39:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:47,935 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 19:39:47,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:39:47,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608281626] [2023-08-26 19:39:47,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608281626] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:39:47,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:39:47,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:39:47,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035992895] [2023-08-26 19:39:47,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:39:47,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:39:47,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:39:47,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:39:47,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:39:47,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:39:47,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 599 transitions, 9572 flow. Second operand has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:47,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:39:47,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:39:47,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:40:01,080 INFO L124 PetriNetUnfolderBase]: 37907/69849 cut-off events. [2023-08-26 19:40:01,080 INFO L125 PetriNetUnfolderBase]: For 809243/816330 co-relation queries the response was YES. [2023-08-26 19:40:01,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372307 conditions, 69849 events. 37907/69849 cut-off events. For 809243/816330 co-relation queries the response was YES. Maximal size of possible extension queue 1965. Compared 678471 event pairs, 19546 based on Foata normal form. 596/68789 useless extension candidates. Maximal degree in co-relation 372220. Up to 59810 conditions per place. [2023-08-26 19:40:02,108 INFO L140 encePairwiseOnDemand]: 279/291 looper letters, 543 selfloop transitions, 62 changer transitions 33/690 dead transitions. [2023-08-26 19:40:02,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 690 transitions, 11776 flow [2023-08-26 19:40:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 19:40:02,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 19:40:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1156 transitions. [2023-08-26 19:40:02,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965635738831615 [2023-08-26 19:40:02,110 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1156 transitions. [2023-08-26 19:40:02,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1156 transitions. [2023-08-26 19:40:02,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:40:02,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1156 transitions. [2023-08-26 19:40:02,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.5) internal successors, (1156), 8 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:02,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 291.0) internal successors, (2619), 9 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:02,112 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 291.0) internal successors, (2619), 9 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:02,113 INFO L175 Difference]: Start difference. First operand has 229 places, 599 transitions, 9572 flow. Second operand 8 states and 1156 transitions. [2023-08-26 19:40:02,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 690 transitions, 11776 flow [2023-08-26 19:40:09,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 690 transitions, 11263 flow, removed 237 selfloop flow, removed 3 redundant places. [2023-08-26 19:40:09,602 INFO L231 Difference]: Finished difference. Result has 237 places, 604 transitions, 9383 flow [2023-08-26 19:40:09,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=9105, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9383, PETRI_PLACES=237, PETRI_TRANSITIONS=604} [2023-08-26 19:40:09,603 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 166 predicate places. [2023-08-26 19:40:09,603 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 604 transitions, 9383 flow [2023-08-26 19:40:09,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:09,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:40:09,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:40:09,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 19:40:09,604 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:40:09,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:40:09,604 INFO L85 PathProgramCache]: Analyzing trace with hash -953748810, now seen corresponding path program 18 times [2023-08-26 19:40:09,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:40:09,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911607407] [2023-08-26 19:40:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:40:09,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:40:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:40:10,322 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 19:40:10,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:40:10,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911607407] [2023-08-26 19:40:10,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911607407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:40:10,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:40:10,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:40:10,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190072387] [2023-08-26 19:40:10,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:40:10,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:40:10,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:40:10,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:40:10,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:40:10,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:40:10,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 604 transitions, 9383 flow. Second operand has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:10,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:40:10,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:40:10,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:40:23,918 INFO L124 PetriNetUnfolderBase]: 37769/69705 cut-off events. [2023-08-26 19:40:23,918 INFO L125 PetriNetUnfolderBase]: For 810845/817805 co-relation queries the response was YES. [2023-08-26 19:40:24,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372742 conditions, 69705 events. 37769/69705 cut-off events. For 810845/817805 co-relation queries the response was YES. Maximal size of possible extension queue 1949. Compared 677188 event pairs, 20041 based on Foata normal form. 612/68703 useless extension candidates. Maximal degree in co-relation 372651. Up to 59921 conditions per place. [2023-08-26 19:40:24,996 INFO L140 encePairwiseOnDemand]: 280/291 looper letters, 547 selfloop transitions, 92 changer transitions 11/702 dead transitions. [2023-08-26 19:40:24,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 702 transitions, 11952 flow [2023-08-26 19:40:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 19:40:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 19:40:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1271 transitions. [2023-08-26 19:40:24,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852997327224131 [2023-08-26 19:40:24,998 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1271 transitions. [2023-08-26 19:40:24,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1271 transitions. [2023-08-26 19:40:24,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:40:24,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1271 transitions. [2023-08-26 19:40:24,999 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 19:40:25,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:25,001 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:25,001 INFO L175 Difference]: Start difference. First operand has 237 places, 604 transitions, 9383 flow. Second operand 9 states and 1271 transitions. [2023-08-26 19:40:25,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 702 transitions, 11952 flow [2023-08-26 19:40:31,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 702 transitions, 11816 flow, removed 26 selfloop flow, removed 4 redundant places. [2023-08-26 19:40:31,910 INFO L231 Difference]: Finished difference. Result has 246 places, 629 transitions, 10099 flow [2023-08-26 19:40:31,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=9267, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10099, PETRI_PLACES=246, PETRI_TRANSITIONS=629} [2023-08-26 19:40:31,911 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 175 predicate places. [2023-08-26 19:40:31,911 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 629 transitions, 10099 flow [2023-08-26 19:40:31,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:31,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:40:31,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:40:31,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 19:40:31,912 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:40:31,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:40:31,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1224232156, now seen corresponding path program 19 times [2023-08-26 19:40:31,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:40:31,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095260066] [2023-08-26 19:40:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:40:31,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:40:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:40:32,260 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 19:40:32,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:40:32,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095260066] [2023-08-26 19:40:32,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095260066] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:40:32,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:40:32,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 19:40:32,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152083941] [2023-08-26 19:40:32,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:40:32,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:40:32,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:40:32,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:40:32,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:40:32,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:40:32,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 629 transitions, 10099 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:32,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:40:32,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:40:32,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:40:49,127 INFO L124 PetriNetUnfolderBase]: 44677/83817 cut-off events. [2023-08-26 19:40:49,128 INFO L125 PetriNetUnfolderBase]: For 982708/988433 co-relation queries the response was YES. [2023-08-26 19:40:50,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443859 conditions, 83817 events. 44677/83817 cut-off events. For 982708/988433 co-relation queries the response was YES. Maximal size of possible extension queue 2604. Compared 856292 event pairs, 14631 based on Foata normal form. 3017/85937 useless extension candidates. Maximal degree in co-relation 443763. Up to 16392 conditions per place. [2023-08-26 19:40:50,249 INFO L140 encePairwiseOnDemand]: 277/291 looper letters, 602 selfloop transitions, 350 changer transitions 22/1026 dead transitions. [2023-08-26 19:40:50,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 1026 transitions, 17463 flow [2023-08-26 19:40:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 19:40:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 19:40:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2044 transitions. [2023-08-26 19:40:50,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017182130584192 [2023-08-26 19:40:50,251 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2044 transitions. [2023-08-26 19:40:50,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2044 transitions. [2023-08-26 19:40:50,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:40:50,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2044 transitions. [2023-08-26 19:40:50,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:50,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 291.0) internal successors, (4365), 15 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:50,256 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 291.0) internal successors, (4365), 15 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:50,256 INFO L175 Difference]: Start difference. First operand has 246 places, 629 transitions, 10099 flow. Second operand 14 states and 2044 transitions. [2023-08-26 19:40:50,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 1026 transitions, 17463 flow [2023-08-26 19:40:59,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1026 transitions, 17134 flow, removed 109 selfloop flow, removed 4 redundant places. [2023-08-26 19:40:59,694 INFO L231 Difference]: Finished difference. Result has 263 places, 741 transitions, 13081 flow [2023-08-26 19:40:59,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=9663, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13081, PETRI_PLACES=263, PETRI_TRANSITIONS=741} [2023-08-26 19:40:59,694 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 192 predicate places. [2023-08-26 19:40:59,694 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 741 transitions, 13081 flow [2023-08-26 19:40:59,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:59,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:40:59,695 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:40:59,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-26 19:40:59,695 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:40:59,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:40:59,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1314551004, now seen corresponding path program 20 times [2023-08-26 19:40:59,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:40:59,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70130360] [2023-08-26 19:40:59,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:40:59,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:40:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:40:59,962 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 19:40:59,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:40:59,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70130360] [2023-08-26 19:40:59,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70130360] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:40:59,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:40:59,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:40:59,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519864880] [2023-08-26 19:40:59,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:40:59,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:40:59,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:40:59,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:40:59,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:40:59,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:40:59,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 741 transitions, 13081 flow. Second operand has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:59,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:40:59,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:40:59,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:41:18,733 INFO L124 PetriNetUnfolderBase]: 45608/83378 cut-off events. [2023-08-26 19:41:18,733 INFO L125 PetriNetUnfolderBase]: For 1158257/1166638 co-relation queries the response was YES. [2023-08-26 19:41:19,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467529 conditions, 83378 events. 45608/83378 cut-off events. For 1158257/1166638 co-relation queries the response was YES. Maximal size of possible extension queue 2460. Compared 825831 event pairs, 18870 based on Foata normal form. 1306/82648 useless extension candidates. Maximal degree in co-relation 467426. Up to 46213 conditions per place. [2023-08-26 19:41:19,921 INFO L140 encePairwiseOnDemand]: 278/291 looper letters, 567 selfloop transitions, 316 changer transitions 24/959 dead transitions. [2023-08-26 19:41:19,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 959 transitions, 17572 flow [2023-08-26 19:41:19,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 19:41:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 19:41:19,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1881 transitions. [2023-08-26 19:41:19,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4972244250594766 [2023-08-26 19:41:19,923 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1881 transitions. [2023-08-26 19:41:19,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1881 transitions. [2023-08-26 19:41:19,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:41:19,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1881 transitions. [2023-08-26 19:41:19,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 144.69230769230768) internal successors, (1881), 13 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:41:19,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:41:19,927 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:41:19,927 INFO L175 Difference]: Start difference. First operand has 263 places, 741 transitions, 13081 flow. Second operand 13 states and 1881 transitions. [2023-08-26 19:41:19,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 959 transitions, 17572 flow [2023-08-26 19:41:31,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 959 transitions, 17174 flow, removed 167 selfloop flow, removed 1 redundant places. [2023-08-26 19:41:31,608 INFO L231 Difference]: Finished difference. Result has 279 places, 765 transitions, 14161 flow [2023-08-26 19:41:31,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=12783, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14161, PETRI_PLACES=279, PETRI_TRANSITIONS=765} [2023-08-26 19:41:31,608 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 208 predicate places. [2023-08-26 19:41:31,608 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 765 transitions, 14161 flow [2023-08-26 19:41:31,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:41:31,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:41:31,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:41:31,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 19:41:31,609 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:41:31,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:41:31,609 INFO L85 PathProgramCache]: Analyzing trace with hash -210601820, now seen corresponding path program 21 times [2023-08-26 19:41:31,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:41:31,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494072372] [2023-08-26 19:41:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:41:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:41:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:41:32,133 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 19:41:32,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:41:32,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494072372] [2023-08-26 19:41:32,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494072372] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:41:32,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:41:32,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-26 19:41:32,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238049256] [2023-08-26 19:41:32,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:41:32,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 19:41:32,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:41:32,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 19:41:32,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-26 19:41:32,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:41:32,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 765 transitions, 14161 flow. Second operand has 11 states, 11 states have (on average 131.36363636363637) internal successors, (1445), 11 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:41:32,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:41:32,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:41:32,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:41:52,125 INFO L124 PetriNetUnfolderBase]: 45969/85877 cut-off events. [2023-08-26 19:41:52,125 INFO L125 PetriNetUnfolderBase]: For 1254578/1259576 co-relation queries the response was YES. [2023-08-26 19:41:53,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487215 conditions, 85877 events. 45969/85877 cut-off events. For 1254578/1259576 co-relation queries the response was YES. Maximal size of possible extension queue 2617. Compared 876855 event pairs, 19728 based on Foata normal form. 1333/85567 useless extension candidates. Maximal degree in co-relation 487106. Up to 51944 conditions per place. [2023-08-26 19:41:53,465 INFO L140 encePairwiseOnDemand]: 278/291 looper letters, 660 selfloop transitions, 216 changer transitions 33/961 dead transitions. [2023-08-26 19:41:53,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 961 transitions, 18437 flow [2023-08-26 19:41:53,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 19:41:53,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 19:41:53,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1599 transitions. [2023-08-26 19:41:53,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49953139643861294 [2023-08-26 19:41:53,467 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1599 transitions. [2023-08-26 19:41:53,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1599 transitions. [2023-08-26 19:41:53,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:41:53,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1599 transitions. [2023-08-26 19:41:53,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 145.36363636363637) internal successors, (1599), 11 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:41:53,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:41:53,470 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:41:53,470 INFO L175 Difference]: Start difference. First operand has 279 places, 765 transitions, 14161 flow. Second operand 11 states and 1599 transitions. [2023-08-26 19:41:53,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 961 transitions, 18437 flow [2023-08-26 19:42:08,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 961 transitions, 18131 flow, removed 132 selfloop flow, removed 1 redundant places. [2023-08-26 19:42:08,111 INFO L231 Difference]: Finished difference. Result has 294 places, 798 transitions, 15368 flow [2023-08-26 19:42:08,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=13888, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15368, PETRI_PLACES=294, PETRI_TRANSITIONS=798} [2023-08-26 19:42:08,112 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 223 predicate places. [2023-08-26 19:42:08,112 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 798 transitions, 15368 flow [2023-08-26 19:42:08,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 131.36363636363637) internal successors, (1445), 11 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:42:08,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:42:08,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:42:08,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 19:42:08,112 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:42:08,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:42:08,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1906889198, now seen corresponding path program 22 times [2023-08-26 19:42:08,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:42:08,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920231292] [2023-08-26 19:42:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:42:08,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:42:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:42:08,464 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 19:42:08,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:42:08,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920231292] [2023-08-26 19:42:08,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920231292] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:42:08,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:42:08,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 19:42:08,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524171583] [2023-08-26 19:42:08,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:42:08,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:42:08,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:42:08,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:42:08,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:42:08,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:42:08,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 798 transitions, 15368 flow. Second operand has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:42:08,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:42:08,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:42:08,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:42:30,686 INFO L124 PetriNetUnfolderBase]: 45904/86722 cut-off events. [2023-08-26 19:42:30,686 INFO L125 PetriNetUnfolderBase]: For 1325897/1331633 co-relation queries the response was YES. [2023-08-26 19:42:31,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500080 conditions, 86722 events. 45904/86722 cut-off events. For 1325897/1331633 co-relation queries the response was YES. Maximal size of possible extension queue 2631. Compared 898669 event pairs, 25438 based on Foata normal form. 408/85740 useless extension candidates. Maximal degree in co-relation 499964. Up to 72148 conditions per place. [2023-08-26 19:42:32,075 INFO L140 encePairwiseOnDemand]: 281/291 looper letters, 742 selfloop transitions, 55 changer transitions 17/866 dead transitions. [2023-08-26 19:42:32,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 866 transitions, 17694 flow [2023-08-26 19:42:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 19:42:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 19:42:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1143 transitions. [2023-08-26 19:42:32,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49097938144329895 [2023-08-26 19:42:32,076 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1143 transitions. [2023-08-26 19:42:32,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1143 transitions. [2023-08-26 19:42:32,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:42:32,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1143 transitions. [2023-08-26 19:42:32,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 142.875) internal successors, (1143), 8 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:42:32,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 291.0) internal successors, (2619), 9 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:42:32,079 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 291.0) internal successors, (2619), 9 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:42:32,079 INFO L175 Difference]: Start difference. First operand has 294 places, 798 transitions, 15368 flow. Second operand 8 states and 1143 transitions. [2023-08-26 19:42:32,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 866 transitions, 17694 flow [2023-08-26 19:42:47,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 866 transitions, 17404 flow, removed 71 selfloop flow, removed 4 redundant places. [2023-08-26 19:42:47,601 INFO L231 Difference]: Finished difference. Result has 299 places, 800 transitions, 15321 flow [2023-08-26 19:42:47,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=15082, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15321, PETRI_PLACES=299, PETRI_TRANSITIONS=800} [2023-08-26 19:42:47,601 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 228 predicate places. [2023-08-26 19:42:47,602 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 800 transitions, 15321 flow [2023-08-26 19:42:47,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.11111111111111) internal successors, (1189), 9 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:42:47,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:42:47,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:42:47,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 19:42:47,602 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:42:47,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:42:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1048144152, now seen corresponding path program 23 times [2023-08-26 19:42:47,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:42:47,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396075076] [2023-08-26 19:42:47,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:42:47,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:42:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:42:48,122 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 19:42:48,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:42:48,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396075076] [2023-08-26 19:42:48,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396075076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:42:48,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:42:48,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 19:42:48,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792730692] [2023-08-26 19:42:48,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:42:48,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 19:42:48,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:42:48,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 19:42:48,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-26 19:42:48,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:42:48,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 800 transitions, 15321 flow. Second operand has 10 states, 10 states have (on average 131.7) internal successors, (1317), 10 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:42:48,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:42:48,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:42:48,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:43:11,388 INFO L124 PetriNetUnfolderBase]: 49951/94117 cut-off events. [2023-08-26 19:43:11,388 INFO L125 PetriNetUnfolderBase]: For 1375477/1381288 co-relation queries the response was YES. [2023-08-26 19:43:12,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541043 conditions, 94117 events. 49951/94117 cut-off events. For 1375477/1381288 co-relation queries the response was YES. Maximal size of possible extension queue 2915. Compared 984759 event pairs, 25260 based on Foata normal form. 497/93273 useless extension candidates. Maximal degree in co-relation 540927. Up to 72432 conditions per place. [2023-08-26 19:43:12,908 INFO L140 encePairwiseOnDemand]: 279/291 looper letters, 777 selfloop transitions, 84 changer transitions 50/963 dead transitions. [2023-08-26 19:43:12,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 963 transitions, 18748 flow [2023-08-26 19:43:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 19:43:12,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 19:43:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1850 transitions. [2023-08-26 19:43:12,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4890298704731694 [2023-08-26 19:43:12,910 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1850 transitions. [2023-08-26 19:43:12,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1850 transitions. [2023-08-26 19:43:12,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:43:12,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1850 transitions. [2023-08-26 19:43:12,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 142.30769230769232) internal successors, (1850), 13 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:43:12,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:43:12,914 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:43:12,914 INFO L175 Difference]: Start difference. First operand has 299 places, 800 transitions, 15321 flow. Second operand 13 states and 1850 transitions. [2023-08-26 19:43:12,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 963 transitions, 18748 flow [2023-08-26 19:43:28,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 963 transitions, 18549 flow, removed 60 selfloop flow, removed 5 redundant places. [2023-08-26 19:43:28,717 INFO L231 Difference]: Finished difference. Result has 313 places, 821 transitions, 15794 flow [2023-08-26 19:43:28,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=15130, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15794, PETRI_PLACES=313, PETRI_TRANSITIONS=821} [2023-08-26 19:43:28,718 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 242 predicate places. [2023-08-26 19:43:28,718 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 821 transitions, 15794 flow [2023-08-26 19:43:28,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 131.7) internal successors, (1317), 10 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:43:28,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:43:28,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:43:28,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-26 19:43:28,718 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:43:28,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:43:28,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1393344348, now seen corresponding path program 24 times [2023-08-26 19:43:28,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:43:28,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047238217] [2023-08-26 19:43:28,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:43:28,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:43:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:43:29,022 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 19:43:29,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:43:29,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047238217] [2023-08-26 19:43:29,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047238217] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:43:29,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:43:29,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 19:43:29,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910393419] [2023-08-26 19:43:29,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:43:29,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:43:29,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:43:29,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:43:29,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:43:29,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:43:29,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 821 transitions, 15794 flow. Second operand has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:43:29,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:43:29,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:43:29,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:43:52,426 INFO L124 PetriNetUnfolderBase]: 49596/92876 cut-off events. [2023-08-26 19:43:52,427 INFO L125 PetriNetUnfolderBase]: For 1402517/1410669 co-relation queries the response was YES. [2023-08-26 19:43:53,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537863 conditions, 92876 events. 49596/92876 cut-off events. For 1402517/1410669 co-relation queries the response was YES. Maximal size of possible extension queue 2816. Compared 964604 event pairs, 27568 based on Foata normal form. 544/91923 useless extension candidates. Maximal degree in co-relation 537741. Up to 77676 conditions per place. [2023-08-26 19:43:54,004 INFO L140 encePairwiseOnDemand]: 280/291 looper letters, 765 selfloop transitions, 51 changer transitions 24/892 dead transitions. [2023-08-26 19:43:54,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 892 transitions, 18247 flow [2023-08-26 19:43:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 19:43:54,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 19:43:54,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1143 transitions. [2023-08-26 19:43:54,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49097938144329895 [2023-08-26 19:43:54,006 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1143 transitions. [2023-08-26 19:43:54,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1143 transitions. [2023-08-26 19:43:54,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:43:54,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1143 transitions. [2023-08-26 19:43:54,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 142.875) internal successors, (1143), 8 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:43:54,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 291.0) internal successors, (2619), 9 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:43:54,008 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 291.0) internal successors, (2619), 9 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:43:54,008 INFO L175 Difference]: Start difference. First operand has 313 places, 821 transitions, 15794 flow. Second operand 8 states and 1143 transitions. [2023-08-26 19:43:54,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 892 transitions, 18247 flow [2023-08-26 19:44:11,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 892 transitions, 18121 flow, removed 43 selfloop flow, removed 6 redundant places. [2023-08-26 19:44:11,147 INFO L231 Difference]: Finished difference. Result has 313 places, 820 transitions, 15770 flow [2023-08-26 19:44:11,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=15670, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15770, PETRI_PLACES=313, PETRI_TRANSITIONS=820} [2023-08-26 19:44:11,147 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 242 predicate places. [2023-08-26 19:44:11,147 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 820 transitions, 15770 flow [2023-08-26 19:44:11,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:44:11,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:44:11,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:44:11,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-26 19:44:11,148 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:44:11,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:44:11,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1360206646, now seen corresponding path program 25 times [2023-08-26 19:44:11,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:44:11,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210863734] [2023-08-26 19:44:11,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:44:11,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:44:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:44:11,495 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 19:44:11,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:44:11,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210863734] [2023-08-26 19:44:11,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210863734] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:44:11,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:44:11,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 19:44:11,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986448246] [2023-08-26 19:44:11,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:44:11,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 19:44:11,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:44:11,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 19:44:11,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-26 19:44:11,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:44:11,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 820 transitions, 15770 flow. Second operand has 12 states, 12 states have (on average 131.08333333333334) internal successors, (1573), 12 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:44:11,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:44:11,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:44:11,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:44:35,860 INFO L124 PetriNetUnfolderBase]: 49442/93229 cut-off events. [2023-08-26 19:44:35,861 INFO L125 PetriNetUnfolderBase]: For 1390411/1398238 co-relation queries the response was YES. [2023-08-26 19:44:37,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539878 conditions, 93229 events. 49442/93229 cut-off events. For 1390411/1398238 co-relation queries the response was YES. Maximal size of possible extension queue 2896. Compared 975298 event pairs, 27668 based on Foata normal form. 494/92227 useless extension candidates. Maximal degree in co-relation 539756. Up to 78469 conditions per place. [2023-08-26 19:44:37,647 INFO L140 encePairwiseOnDemand]: 279/291 looper letters, 795 selfloop transitions, 24 changer transitions 41/912 dead transitions. [2023-08-26 19:44:37,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 912 transitions, 18439 flow [2023-08-26 19:44:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 19:44:37,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 19:44:37,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1534 transitions. [2023-08-26 19:44:37,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47922524211184003 [2023-08-26 19:44:37,649 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1534 transitions. [2023-08-26 19:44:37,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1534 transitions. [2023-08-26 19:44:37,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:44:37,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1534 transitions. [2023-08-26 19:44:37,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 139.45454545454547) internal successors, (1534), 11 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:44:37,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:44:37,652 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 291.0) internal successors, (3492), 12 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:44:37,652 INFO L175 Difference]: Start difference. First operand has 313 places, 820 transitions, 15770 flow. Second operand 11 states and 1534 transitions. [2023-08-26 19:44:37,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 912 transitions, 18439 flow [2023-08-26 19:44:55,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 912 transitions, 18218 flow, removed 67 selfloop flow, removed 5 redundant places. [2023-08-26 19:44:55,069 INFO L231 Difference]: Finished difference. Result has 326 places, 835 transitions, 15975 flow [2023-08-26 19:44:55,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=15553, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=798, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15975, PETRI_PLACES=326, PETRI_TRANSITIONS=835} [2023-08-26 19:44:55,070 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 255 predicate places. [2023-08-26 19:44:55,070 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 835 transitions, 15975 flow [2023-08-26 19:44:55,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.08333333333334) internal successors, (1573), 12 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:44:55,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:44:55,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:44:55,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-26 19:44:55,071 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:44:55,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:44:55,071 INFO L85 PathProgramCache]: Analyzing trace with hash 93236380, now seen corresponding path program 26 times [2023-08-26 19:44:55,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:44:55,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671106107] [2023-08-26 19:44:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:44:55,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:44:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:44:55,384 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 19:44:55,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:44:55,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671106107] [2023-08-26 19:44:55,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671106107] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:44:55,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:44:55,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-26 19:44:55,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925608621] [2023-08-26 19:44:55,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:44:55,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 19:44:55,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:44:55,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 19:44:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-08-26 19:44:55,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 291 [2023-08-26 19:44:55,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 835 transitions, 15975 flow. Second operand has 11 states, 11 states have (on average 131.36363636363637) internal successors, (1445), 11 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:44:55,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:44:55,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 291 [2023-08-26 19:44:55,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand