/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 INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/popl20-counter-determinism.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 16:56:14,925 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 16:56:15,000 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 16:56:15,004 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 16:56:15,004 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 16:56:15,037 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 16:56:15,038 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 16:56:15,043 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 16:56:15,044 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 16:56:15,048 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 16:56:15,048 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 16:56:15,048 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 16:56:15,049 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 16:56:15,049 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 16:56:15,049 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 16:56:15,049 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 16:56:15,050 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 16:56:15,050 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 16:56:15,050 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 16:56:15,050 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 16:56:15,050 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 16:56:15,052 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 16:56:15,052 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 16:56:15,053 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 16:56:15,053 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 16:56:15,053 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 16:56:15,053 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 16:56:15,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:56:15,054 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 16:56:15,054 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 16:56:15,054 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 16:56:15,054 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 16:56:15,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 16:56:15,054 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 16:56:15,055 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 16:56:15,055 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 16:56:15,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 16:56:15,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 16:56:15,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 16:56:15,400 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 16:56:15,401 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 16:56:15,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-determinism.wvr.c [2023-08-26 16:56:16,653 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 16:56:16,874 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 16:56:16,875 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-determinism.wvr.c [2023-08-26 16:56:16,885 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4787326a3/aee2a8c5daf741fc9f58343f8a45c114/FLAG0f5529ab1 [2023-08-26 16:56:16,900 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4787326a3/aee2a8c5daf741fc9f58343f8a45c114 [2023-08-26 16:56:16,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 16:56:16,907 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 16:56:16,909 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 16:56:16,909 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 16:56:16,912 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 16:56:16,913 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:56:16" (1/1) ... [2023-08-26 16:56:16,913 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a9f644a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:56:16, skipping insertion in model container [2023-08-26 16:56:16,913 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:56:16" (1/1) ... [2023-08-26 16:56:16,934 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 16:56:17,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:56:17,126 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 16:56:17,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:56:17,170 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 16:56:17,170 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 16:56:17,177 INFO L206 MainTranslator]: Completed translation [2023-08-26 16:56:17,178 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:56:17 WrapperNode [2023-08-26 16:56:17,178 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 16:56:17,179 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 16:56:17,179 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 16:56:17,179 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 16:56:17,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:56:17" (1/1) ... [2023-08-26 16:56:17,199 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:56:17" (1/1) ... [2023-08-26 16:56:17,228 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 121 [2023-08-26 16:56:17,228 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 16:56:17,229 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 16:56:17,229 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 16:56:17,229 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 16:56:17,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:56:17" (1/1) ... [2023-08-26 16:56:17,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:56:17" (1/1) ... [2023-08-26 16:56:17,249 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:56:17" (1/1) ... [2023-08-26 16:56:17,249 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:56:17" (1/1) ... [2023-08-26 16:56:17,257 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:56:17" (1/1) ... [2023-08-26 16:56:17,260 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:56:17" (1/1) ... [2023-08-26 16:56:17,262 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:56:17" (1/1) ... [2023-08-26 16:56:17,263 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:56:17" (1/1) ... [2023-08-26 16:56:17,273 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 16:56:17,274 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 16:56:17,275 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 16:56:17,275 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 16:56:17,275 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:56:17" (1/1) ... [2023-08-26 16:56:17,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:56:17,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:56:17,310 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 16:56:17,325 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 16:56:17,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 16:56:17,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 16:56:17,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 16:56:17,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 16:56:17,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 16:56:17,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 16:56:17,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 16:56:17,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-26 16:56:17,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-26 16:56:17,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 16:56:17,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 16:56:17,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 16:56:17,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 16:56:17,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 16:56:17,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 16:56:17,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 16:56:17,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 16:56:17,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 16:56:17,358 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 16:56:17,461 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 16:56:17,463 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 16:56:17,702 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 16:56:17,742 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 16:56:17,742 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-26 16:56:17,744 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:56:17 BoogieIcfgContainer [2023-08-26 16:56:17,744 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 16:56:17,746 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 16:56:17,746 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 16:56:17,749 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 16:56:17,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:56:16" (1/3) ... [2023-08-26 16:56:17,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16af0748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:56:17, skipping insertion in model container [2023-08-26 16:56:17,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:56:17" (2/3) ... [2023-08-26 16:56:17,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16af0748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:56:17, skipping insertion in model container [2023-08-26 16:56:17,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:56:17" (3/3) ... [2023-08-26 16:56:17,751 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-determinism.wvr.c [2023-08-26 16:56:17,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 16:56:17,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-26 16:56:17,770 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 16:56:17,874 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 16:56:17,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 141 transitions, 314 flow [2023-08-26 16:56:18,018 INFO L124 PetriNetUnfolderBase]: 9/137 cut-off events. [2023-08-26 16:56:18,018 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 16:56:18,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 137 events. 9/137 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 166 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-08-26 16:56:18,027 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 141 transitions, 314 flow [2023-08-26 16:56:18,035 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 124 transitions, 272 flow [2023-08-26 16:56:18,039 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:56:18,051 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 124 transitions, 272 flow [2023-08-26 16:56:18,055 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 124 transitions, 272 flow [2023-08-26 16:56:18,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 124 transitions, 272 flow [2023-08-26 16:56:18,089 INFO L124 PetriNetUnfolderBase]: 9/124 cut-off events. [2023-08-26 16:56:18,089 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 16:56:18,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 124 events. 9/124 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 167 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-08-26 16:56:18,092 INFO L119 LiptonReduction]: Number of co-enabled transitions 3608 [2023-08-26 16:56:21,858 INFO L134 LiptonReduction]: Checked pairs total: 3733 [2023-08-26 16:56:21,859 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-26 16:56:21,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 16:56:21,876 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;@75c7391c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:56:21,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-26 16:56:21,878 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:56:21,878 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 16:56:21,878 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:56:21,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:21,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 16:56:21,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:21,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:21,882 INFO L85 PathProgramCache]: Analyzing trace with hash 567, now seen corresponding path program 1 times [2023-08-26 16:56:21,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:21,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635563647] [2023-08-26 16:56:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:21,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:21,959 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 16:56:21,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:21,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635563647] [2023-08-26 16:56:21,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635563647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:21,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:21,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 16:56:21,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368629287] [2023-08-26 16:56:21,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:21,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 16:56:21,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:21,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 16:56:21,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 16:56:21,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 257 [2023-08-26 16:56:21,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 114 flow. Second operand has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:21,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:21,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 257 [2023-08-26 16:56:21,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:22,324 INFO L124 PetriNetUnfolderBase]: 2546/3185 cut-off events. [2023-08-26 16:56:22,325 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-08-26 16:56:22,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6469 conditions, 3185 events. 2546/3185 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11580 event pairs, 1193 based on Foata normal form. 0/1500 useless extension candidates. Maximal degree in co-relation 5013. Up to 3159 conditions per place. [2023-08-26 16:56:22,348 INFO L140 encePairwiseOnDemand]: 255/257 looper letters, 39 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-08-26 16:56:22,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 188 flow [2023-08-26 16:56:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 16:56:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 16:56:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 287 transitions. [2023-08-26 16:56:22,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583657587548638 [2023-08-26 16:56:22,360 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 287 transitions. [2023-08-26 16:56:22,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 287 transitions. [2023-08-26 16:56:22,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:22,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 287 transitions. [2023-08-26 16:56:22,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 143.5) internal successors, (287), 2 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:22,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:22,371 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:22,372 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 114 flow. Second operand 2 states and 287 transitions. [2023-08-26 16:56:22,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 188 flow [2023-08-26 16:56:22,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-26 16:56:22,379 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2023-08-26 16:56:22,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-08-26 16:56:22,383 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-26 16:56:22,384 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2023-08-26 16:56:22,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:22,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:22,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 16:56:22,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 16:56:22,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:22,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:22,385 INFO L85 PathProgramCache]: Analyzing trace with hash 557160, now seen corresponding path program 1 times [2023-08-26 16:56:22,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:22,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408402592] [2023-08-26 16:56:22,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:22,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:22,724 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 16:56:22,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:22,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408402592] [2023-08-26 16:56:22,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408402592] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:22,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:22,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:56:22,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193527514] [2023-08-26 16:56:22,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:22,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:56:22,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:22,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:56:22,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:56:22,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 257 [2023-08-26 16:56:22,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:22,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:22,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 257 [2023-08-26 16:56:22,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:22,969 INFO L124 PetriNetUnfolderBase]: 2435/3044 cut-off events. [2023-08-26 16:56:22,969 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 16:56:22,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6104 conditions, 3044 events. 2435/3044 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 10862 event pairs, 1138 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 6101. Up to 3017 conditions per place. [2023-08-26 16:56:22,985 INFO L140 encePairwiseOnDemand]: 254/257 looper letters, 36 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-26 16:56:22,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 164 flow [2023-08-26 16:56:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:56:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:56:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2023-08-26 16:56:22,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4085603112840467 [2023-08-26 16:56:22,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2023-08-26 16:56:22,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2023-08-26 16:56:22,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:22,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2023-08-26 16:56:22,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:22,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:22,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:22,996 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 315 transitions. [2023-08-26 16:56:22,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 164 flow [2023-08-26 16:56:22,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 16:56:22,998 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 92 flow [2023-08-26 16:56:23,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-26 16:56:23,001 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-26 16:56:23,001 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 92 flow [2023-08-26 16:56:23,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:23,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:23,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 16:56:23,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 16:56:23,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:23,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:23,003 INFO L85 PathProgramCache]: Analyzing trace with hash 557161, now seen corresponding path program 1 times [2023-08-26 16:56:23,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:23,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240213180] [2023-08-26 16:56:23,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:23,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:23,172 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 16:56:23,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:23,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240213180] [2023-08-26 16:56:23,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240213180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:23,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:23,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:56:23,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409398187] [2023-08-26 16:56:23,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:23,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:56:23,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:23,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:56:23,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:56:23,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 257 [2023-08-26 16:56:23,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:23,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:23,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 257 [2023-08-26 16:56:23,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:23,366 INFO L124 PetriNetUnfolderBase]: 2324/2903 cut-off events. [2023-08-26 16:56:23,366 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 16:56:23,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5824 conditions, 2903 events. 2324/2903 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10268 event pairs, 1083 based on Foata normal form. 0/1390 useless extension candidates. Maximal degree in co-relation 5820. Up to 2876 conditions per place. [2023-08-26 16:56:23,384 INFO L140 encePairwiseOnDemand]: 254/257 looper letters, 34 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-26 16:56:23,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 158 flow [2023-08-26 16:56:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:56:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:56:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2023-08-26 16:56:23,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42153047989623865 [2023-08-26 16:56:23,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2023-08-26 16:56:23,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2023-08-26 16:56:23,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:23,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2023-08-26 16:56:23,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:23,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:23,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:23,390 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 92 flow. Second operand 3 states and 325 transitions. [2023-08-26 16:56:23,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 158 flow [2023-08-26 16:56:23,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:56:23,392 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 89 flow [2023-08-26 16:56:23,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-26 16:56:23,393 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2023-08-26 16:56:23,393 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 89 flow [2023-08-26 16:56:23,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:23,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:23,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 16:56:23,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 16:56:23,397 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:23,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:23,398 INFO L85 PathProgramCache]: Analyzing trace with hash 535446030, now seen corresponding path program 1 times [2023-08-26 16:56:23,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:23,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419068039] [2023-08-26 16:56:23,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:23,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:23,519 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 16:56:23,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:23,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419068039] [2023-08-26 16:56:23,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419068039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:23,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:23,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:56:23,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171580006] [2023-08-26 16:56:23,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:23,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:56:23,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:56:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:56:23,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 257 [2023-08-26 16:56:23,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:23,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:23,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 257 [2023-08-26 16:56:23,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:23,761 INFO L124 PetriNetUnfolderBase]: 2278/2839 cut-off events. [2023-08-26 16:56:23,761 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 16:56:23,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5697 conditions, 2839 events. 2278/2839 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9934 event pairs, 1061 based on Foata normal form. 0/1368 useless extension candidates. Maximal degree in co-relation 5693. Up to 2812 conditions per place. [2023-08-26 16:56:23,778 INFO L140 encePairwiseOnDemand]: 254/257 looper letters, 32 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-26 16:56:23,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 151 flow [2023-08-26 16:56:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:56:23,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:56:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2023-08-26 16:56:23,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41893644617380027 [2023-08-26 16:56:23,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2023-08-26 16:56:23,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2023-08-26 16:56:23,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:23,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2023-08-26 16:56:23,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:23,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:23,786 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:23,786 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 89 flow. Second operand 3 states and 323 transitions. [2023-08-26 16:56:23,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 151 flow [2023-08-26 16:56:23,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:56:23,789 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 86 flow [2023-08-26 16:56:23,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-08-26 16:56:23,791 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -11 predicate places. [2023-08-26 16:56:23,791 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 86 flow [2023-08-26 16:56:23,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:23,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:23,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 16:56:23,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 16:56:23,792 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:23,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:23,793 INFO L85 PathProgramCache]: Analyzing trace with hash 535446029, now seen corresponding path program 1 times [2023-08-26 16:56:23,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:23,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656492552] [2023-08-26 16:56:23,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:23,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:23,860 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 16:56:23,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:23,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656492552] [2023-08-26 16:56:23,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656492552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:23,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:23,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:56:23,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807574393] [2023-08-26 16:56:23,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:23,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:56:23,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:23,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:56:23,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:56:23,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 257 [2023-08-26 16:56:23,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:23,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:23,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 257 [2023-08-26 16:56:23,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:24,061 INFO L124 PetriNetUnfolderBase]: 2232/2775 cut-off events. [2023-08-26 16:56:24,061 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 16:56:24,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5570 conditions, 2775 events. 2232/2775 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9686 event pairs, 1039 based on Foata normal form. 0/1346 useless extension candidates. Maximal degree in co-relation 5566. Up to 2748 conditions per place. [2023-08-26 16:56:24,080 INFO L140 encePairwiseOnDemand]: 254/257 looper letters, 30 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-26 16:56:24,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 144 flow [2023-08-26 16:56:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:56:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:56:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-08-26 16:56:24,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40077821011673154 [2023-08-26 16:56:24,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-08-26 16:56:24,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-08-26 16:56:24,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:24,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-08-26 16:56:24,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,085 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 86 flow. Second operand 3 states and 309 transitions. [2023-08-26 16:56:24,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 144 flow [2023-08-26 16:56:24,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:56:24,086 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 83 flow [2023-08-26 16:56:24,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-08-26 16:56:24,088 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -12 predicate places. [2023-08-26 16:56:24,088 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 83 flow [2023-08-26 16:56:24,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:24,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:24,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 16:56:24,089 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:24,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:24,089 INFO L85 PathProgramCache]: Analyzing trace with hash -832429323, now seen corresponding path program 1 times [2023-08-26 16:56:24,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:24,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295840713] [2023-08-26 16:56:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:24,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:24,158 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 16:56:24,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:24,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295840713] [2023-08-26 16:56:24,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295840713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:24,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:24,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:56:24,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246053031] [2023-08-26 16:56:24,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:24,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:56:24,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:56:24,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:56:24,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 257 [2023-08-26 16:56:24,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:24,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 257 [2023-08-26 16:56:24,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:24,337 INFO L124 PetriNetUnfolderBase]: 2126/2639 cut-off events. [2023-08-26 16:56:24,337 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 16:56:24,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5299 conditions, 2639 events. 2126/2639 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9066 event pairs, 989 based on Foata normal form. 0/1296 useless extension candidates. Maximal degree in co-relation 5295. Up to 2612 conditions per place. [2023-08-26 16:56:24,356 INFO L140 encePairwiseOnDemand]: 254/257 looper letters, 28 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-26 16:56:24,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 137 flow [2023-08-26 16:56:24,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:56:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:56:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 319 transitions. [2023-08-26 16:56:24,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41374837872892345 [2023-08-26 16:56:24,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 319 transitions. [2023-08-26 16:56:24,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 319 transitions. [2023-08-26 16:56:24,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:24,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 319 transitions. [2023-08-26 16:56:24,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,363 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 83 flow. Second operand 3 states and 319 transitions. [2023-08-26 16:56:24,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 137 flow [2023-08-26 16:56:24,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:56:24,365 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 80 flow [2023-08-26 16:56:24,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-08-26 16:56:24,368 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -13 predicate places. [2023-08-26 16:56:24,368 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 80 flow [2023-08-26 16:56:24,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:24,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:24,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 16:56:24,369 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:24,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:24,370 INFO L85 PathProgramCache]: Analyzing trace with hash -832429322, now seen corresponding path program 1 times [2023-08-26 16:56:24,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:24,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409308750] [2023-08-26 16:56:24,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:24,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:24,422 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 16:56:24,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:24,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409308750] [2023-08-26 16:56:24,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409308750] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:24,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:24,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:56:24,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947219934] [2023-08-26 16:56:24,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:24,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:56:24,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:24,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:56:24,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:56:24,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 257 [2023-08-26 16:56:24,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:24,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 257 [2023-08-26 16:56:24,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:24,607 INFO L124 PetriNetUnfolderBase]: 2020/2503 cut-off events. [2023-08-26 16:56:24,607 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 16:56:24,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5028 conditions, 2503 events. 2020/2503 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 8491 event pairs, 939 based on Foata normal form. 0/1246 useless extension candidates. Maximal degree in co-relation 5024. Up to 2476 conditions per place. [2023-08-26 16:56:24,619 INFO L140 encePairwiseOnDemand]: 254/257 looper letters, 26 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-26 16:56:24,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 31 transitions, 130 flow [2023-08-26 16:56:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:56:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:56:24,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-08-26 16:56:24,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3955901426718547 [2023-08-26 16:56:24,621 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-08-26 16:56:24,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-08-26 16:56:24,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:24,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-08-26 16:56:24,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,627 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 80 flow. Second operand 3 states and 305 transitions. [2023-08-26 16:56:24,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 31 transitions, 130 flow [2023-08-26 16:56:24,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 31 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:56:24,629 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 77 flow [2023-08-26 16:56:24,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-08-26 16:56:24,631 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -14 predicate places. [2023-08-26 16:56:24,631 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 77 flow [2023-08-26 16:56:24,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:24,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:24,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 16:56:24,632 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:24,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:24,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1100647044, now seen corresponding path program 1 times [2023-08-26 16:56:24,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:24,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609911264] [2023-08-26 16:56:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:24,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:24,927 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 16:56:24,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:24,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609911264] [2023-08-26 16:56:24,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609911264] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:24,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:24,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 16:56:24,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064505872] [2023-08-26 16:56:24,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:24,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:56:24,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:24,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:56:24,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:56:24,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 257 [2023-08-26 16:56:24,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:24,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:24,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 257 [2023-08-26 16:56:24,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:25,069 INFO L124 PetriNetUnfolderBase]: 1606/2008 cut-off events. [2023-08-26 16:56:25,069 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 16:56:25,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4039 conditions, 2008 events. 1606/2008 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6659 event pairs, 741 based on Foata normal form. 0/1048 useless extension candidates. Maximal degree in co-relation 4035. Up to 1981 conditions per place. [2023-08-26 16:56:25,079 INFO L140 encePairwiseOnDemand]: 255/257 looper letters, 25 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-26 16:56:25,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 127 flow [2023-08-26 16:56:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:56:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:56:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2023-08-26 16:56:25,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.377431906614786 [2023-08-26 16:56:25,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 291 transitions. [2023-08-26 16:56:25,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 291 transitions. [2023-08-26 16:56:25,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:25,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 291 transitions. [2023-08-26 16:56:25,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,084 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 77 flow. Second operand 3 states and 291 transitions. [2023-08-26 16:56:25,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 127 flow [2023-08-26 16:56:25,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:56:25,085 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 76 flow [2023-08-26 16:56:25,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-26 16:56:25,086 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -14 predicate places. [2023-08-26 16:56:25,086 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 76 flow [2023-08-26 16:56:25,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:25,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:25,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 16:56:25,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:25,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1100647046, now seen corresponding path program 1 times [2023-08-26 16:56:25,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:25,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180765904] [2023-08-26 16:56:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:25,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:25,177 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 16:56:25,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:25,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180765904] [2023-08-26 16:56:25,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180765904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:25,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:25,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 16:56:25,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247596499] [2023-08-26 16:56:25,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:25,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 16:56:25,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:25,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 16:56:25,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-26 16:56:25,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 257 [2023-08-26 16:56:25,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 84.5) internal successors, (507), 6 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:25,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 257 [2023-08-26 16:56:25,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:25,282 INFO L124 PetriNetUnfolderBase]: 1192/1513 cut-off events. [2023-08-26 16:56:25,282 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 16:56:25,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3050 conditions, 1513 events. 1192/1513 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4885 event pairs, 543 based on Foata normal form. 0/850 useless extension candidates. Maximal degree in co-relation 3046. Up to 1486 conditions per place. [2023-08-26 16:56:25,289 INFO L140 encePairwiseOnDemand]: 255/257 looper letters, 24 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-26 16:56:25,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 124 flow [2023-08-26 16:56:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:56:25,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:56:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-08-26 16:56:25,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35667963683527887 [2023-08-26 16:56:25,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-08-26 16:56:25,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-08-26 16:56:25,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:25,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-08-26 16:56:25,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,294 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 76 flow. Second operand 3 states and 275 transitions. [2023-08-26 16:56:25,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 124 flow [2023-08-26 16:56:25,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:56:25,295 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 75 flow [2023-08-26 16:56:25,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-26 16:56:25,296 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -14 predicate places. [2023-08-26 16:56:25,296 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 75 flow [2023-08-26 16:56:25,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.5) internal successors, (507), 6 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:25,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:25,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 16:56:25,297 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:25,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:25,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1866693389, now seen corresponding path program 1 times [2023-08-26 16:56:25,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:25,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737147556] [2023-08-26 16:56:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:25,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:25,391 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 16:56:25,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:25,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737147556] [2023-08-26 16:56:25,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737147556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:25,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:25,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:56:25,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065943527] [2023-08-26 16:56:25,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:25,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:56:25,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:25,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:56:25,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:56:25,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 257 [2023-08-26 16:56:25,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:25,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 257 [2023-08-26 16:56:25,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:25,564 INFO L124 PetriNetUnfolderBase]: 1537/1954 cut-off events. [2023-08-26 16:56:25,564 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-26 16:56:25,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3956 conditions, 1954 events. 1537/1954 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6419 event pairs, 141 based on Foata normal form. 1/1124 useless extension candidates. Maximal degree in co-relation 3952. Up to 1733 conditions per place. [2023-08-26 16:56:25,573 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 41 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-08-26 16:56:25,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 220 flow [2023-08-26 16:56:25,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:56:25,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:56:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-08-26 16:56:25,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291828793774319 [2023-08-26 16:56:25,575 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-08-26 16:56:25,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-08-26 16:56:25,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:25,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-08-26 16:56:25,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,577 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,577 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 75 flow. Second operand 3 states and 408 transitions. [2023-08-26 16:56:25,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 220 flow [2023-08-26 16:56:25,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:56:25,579 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 107 flow [2023-08-26 16:56:25,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-26 16:56:25,581 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -12 predicate places. [2023-08-26 16:56:25,581 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 107 flow [2023-08-26 16:56:25,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:25,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:25,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 16:56:25,581 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:25,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:25,582 INFO L85 PathProgramCache]: Analyzing trace with hash -954029490, now seen corresponding path program 1 times [2023-08-26 16:56:25,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:25,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171663044] [2023-08-26 16:56:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:25,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:25,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:25,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171663044] [2023-08-26 16:56:25,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171663044] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:25,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:25,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:56:25,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714848392] [2023-08-26 16:56:25,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:25,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:56:25,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:25,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:56:25,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:56:25,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:25,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:25,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:25,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:25,958 INFO L124 PetriNetUnfolderBase]: 2463/3233 cut-off events. [2023-08-26 16:56:25,958 INFO L125 PetriNetUnfolderBase]: For 898/903 co-relation queries the response was YES. [2023-08-26 16:56:25,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7922 conditions, 3233 events. 2463/3233 cut-off events. For 898/903 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13327 event pairs, 566 based on Foata normal form. 59/3221 useless extension candidates. Maximal degree in co-relation 7917. Up to 1487 conditions per place. [2023-08-26 16:56:25,977 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 83 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2023-08-26 16:56:25,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 91 transitions, 458 flow [2023-08-26 16:56:25,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:56:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:56:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 603 transitions. [2023-08-26 16:56:25,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46926070038910506 [2023-08-26 16:56:25,979 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 603 transitions. [2023-08-26 16:56:25,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 603 transitions. [2023-08-26 16:56:25,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:25,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 603 transitions. [2023-08-26 16:56:25,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.6) internal successors, (603), 5 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,983 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,983 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 107 flow. Second operand 5 states and 603 transitions. [2023-08-26 16:56:25,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 91 transitions, 458 flow [2023-08-26 16:56:25,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 91 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:56:25,985 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 145 flow [2023-08-26 16:56:25,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2023-08-26 16:56:25,986 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2023-08-26 16:56:25,986 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 145 flow [2023-08-26 16:56:25,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:25,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:25,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:25,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 16:56:25,987 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:25,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:25,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1117922634, now seen corresponding path program 1 times [2023-08-26 16:56:25,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:25,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393964654] [2023-08-26 16:56:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:25,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:26,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:26,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393964654] [2023-08-26 16:56:26,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393964654] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:56:26,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047181724] [2023-08-26 16:56:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:26,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:56:26,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:56:26,054 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:56:26,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 16:56:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:26,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 16:56:26,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:56:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:26,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:56:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:26,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047181724] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:56:26,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:56:26,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-26 16:56:26,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077682700] [2023-08-26 16:56:26,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:56:26,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 16:56:26,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 16:56:26,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 16:56:26,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:26,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 145 flow. Second operand has 8 states, 8 states have (on average 108.75) internal successors, (870), 8 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:26,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:26,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:26,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:26,708 INFO L124 PetriNetUnfolderBase]: 2715/3533 cut-off events. [2023-08-26 16:56:26,709 INFO L125 PetriNetUnfolderBase]: For 2619/2762 co-relation queries the response was YES. [2023-08-26 16:56:26,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10204 conditions, 3533 events. 2715/3533 cut-off events. For 2619/2762 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 14650 event pairs, 625 based on Foata normal form. 206/3641 useless extension candidates. Maximal degree in co-relation 10196. Up to 1454 conditions per place. [2023-08-26 16:56:26,727 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 99 selfloop transitions, 10 changer transitions 0/112 dead transitions. [2023-08-26 16:56:26,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 112 transitions, 596 flow [2023-08-26 16:56:26,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:56:26,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:56:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 838 transitions. [2023-08-26 16:56:26,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46581434130072263 [2023-08-26 16:56:26,730 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 838 transitions. [2023-08-26 16:56:26,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 838 transitions. [2023-08-26 16:56:26,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:26,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 838 transitions. [2023-08-26 16:56:26,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.71428571428571) internal successors, (838), 7 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:26,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 257.0) internal successors, (2056), 8 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:26,735 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 257.0) internal successors, (2056), 8 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:26,735 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 145 flow. Second operand 7 states and 838 transitions. [2023-08-26 16:56:26,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 112 transitions, 596 flow [2023-08-26 16:56:26,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 112 transitions, 589 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 16:56:26,739 INFO L231 Difference]: Finished difference. Result has 57 places, 42 transitions, 200 flow [2023-08-26 16:56:26,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=57, PETRI_TRANSITIONS=42} [2023-08-26 16:56:26,740 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-26 16:56:26,740 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 42 transitions, 200 flow [2023-08-26 16:56:26,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.75) internal successors, (870), 8 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:26,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:26,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:26,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 16:56:26,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-26 16:56:26,946 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:26,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:26,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1422445816, now seen corresponding path program 2 times [2023-08-26 16:56:26,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:26,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255884691] [2023-08-26 16:56:26,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:26,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:27,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:27,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255884691] [2023-08-26 16:56:27,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255884691] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:27,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:27,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:56:27,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181662600] [2023-08-26 16:56:27,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:27,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:56:27,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:27,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:56:27,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:56:27,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:27,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:27,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:27,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:27,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:27,458 INFO L124 PetriNetUnfolderBase]: 3893/5124 cut-off events. [2023-08-26 16:56:27,459 INFO L125 PetriNetUnfolderBase]: For 10323/10531 co-relation queries the response was YES. [2023-08-26 16:56:27,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17375 conditions, 5124 events. 3893/5124 cut-off events. For 10323/10531 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22547 event pairs, 959 based on Foata normal form. 242/5220 useless extension candidates. Maximal degree in co-relation 17363. Up to 2643 conditions per place. [2023-08-26 16:56:27,495 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 94 selfloop transitions, 8 changer transitions 0/106 dead transitions. [2023-08-26 16:56:27,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 106 transitions, 701 flow [2023-08-26 16:56:27,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:56:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:56:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 599 transitions. [2023-08-26 16:56:27,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466147859922179 [2023-08-26 16:56:27,498 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 599 transitions. [2023-08-26 16:56:27,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 599 transitions. [2023-08-26 16:56:27,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:27,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 599 transitions. [2023-08-26 16:56:27,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:27,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:27,502 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:27,502 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 200 flow. Second operand 5 states and 599 transitions. [2023-08-26 16:56:27,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 106 transitions, 701 flow [2023-08-26 16:56:27,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 106 transitions, 669 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-26 16:56:27,522 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 250 flow [2023-08-26 16:56:27,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2023-08-26 16:56:27,523 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2023-08-26 16:56:27,523 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 250 flow [2023-08-26 16:56:27,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:27,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:27,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:27,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 16:56:27,524 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:27,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:27,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1576936788, now seen corresponding path program 2 times [2023-08-26 16:56:27,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:27,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791391605] [2023-08-26 16:56:27,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:27,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:27,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:27,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791391605] [2023-08-26 16:56:27,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791391605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:27,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:27,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:56:27,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241930457] [2023-08-26 16:56:27,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:27,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:56:27,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:27,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:56:27,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:56:27,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:27,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:27,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:27,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:27,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:28,126 INFO L124 PetriNetUnfolderBase]: 4223/5551 cut-off events. [2023-08-26 16:56:28,126 INFO L125 PetriNetUnfolderBase]: For 14875/15090 co-relation queries the response was YES. [2023-08-26 16:56:28,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20722 conditions, 5551 events. 4223/5551 cut-off events. For 14875/15090 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23945 event pairs, 1073 based on Foata normal form. 237/5550 useless extension candidates. Maximal degree in co-relation 20707. Up to 4330 conditions per place. [2023-08-26 16:56:28,170 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 76 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2023-08-26 16:56:28,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 94 transitions, 666 flow [2023-08-26 16:56:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:56:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:56:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-08-26 16:56:28,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622568093385214 [2023-08-26 16:56:28,173 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-08-26 16:56:28,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-08-26 16:56:28,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:28,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-08-26 16:56:28,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:28,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:28,176 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:28,177 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 250 flow. Second operand 5 states and 594 transitions. [2023-08-26 16:56:28,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 94 transitions, 666 flow [2023-08-26 16:56:28,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 633 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-26 16:56:28,193 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 347 flow [2023-08-26 16:56:28,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2023-08-26 16:56:28,194 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2023-08-26 16:56:28,194 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 347 flow [2023-08-26 16:56:28,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:28,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:28,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:28,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 16:56:28,195 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:28,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:28,195 INFO L85 PathProgramCache]: Analyzing trace with hash -190029956, now seen corresponding path program 3 times [2023-08-26 16:56:28,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:28,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773207597] [2023-08-26 16:56:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:28,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:28,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:28,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773207597] [2023-08-26 16:56:28,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773207597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:56:28,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217761389] [2023-08-26 16:56:28,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:56:28,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:56:28,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:56:28,260 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:56:28,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 16:56:28,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 16:56:28,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:56:28,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 16:56:28,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:56:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:28,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:56:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:28,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217761389] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:56:28,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:56:28,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-26 16:56:28,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184323699] [2023-08-26 16:56:28,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:56:28,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 16:56:28,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:28,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 16:56:28,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 16:56:28,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:28,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 347 flow. Second operand has 8 states, 8 states have (on average 109.625) internal successors, (877), 8 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 16:56:28,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:28,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:28,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:29,031 INFO L124 PetriNetUnfolderBase]: 4709/6179 cut-off events. [2023-08-26 16:56:29,031 INFO L125 PetriNetUnfolderBase]: For 16607/16810 co-relation queries the response was YES. [2023-08-26 16:56:29,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23800 conditions, 6179 events. 4709/6179 cut-off events. For 16607/16810 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 27259 event pairs, 593 based on Foata normal form. 299/6396 useless extension candidates. Maximal degree in co-relation 23783. Up to 2359 conditions per place. [2023-08-26 16:56:29,076 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 136 selfloop transitions, 24 changer transitions 0/163 dead transitions. [2023-08-26 16:56:29,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 163 transitions, 1245 flow [2023-08-26 16:56:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:56:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:56:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 838 transitions. [2023-08-26 16:56:29,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46581434130072263 [2023-08-26 16:56:29,079 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 838 transitions. [2023-08-26 16:56:29,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 838 transitions. [2023-08-26 16:56:29,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:29,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 838 transitions. [2023-08-26 16:56:29,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.71428571428571) internal successors, (838), 7 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:29,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 257.0) internal successors, (2056), 8 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:29,084 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 257.0) internal successors, (2056), 8 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:29,084 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 347 flow. Second operand 7 states and 838 transitions. [2023-08-26 16:56:29,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 163 transitions, 1245 flow [2023-08-26 16:56:29,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 163 transitions, 1175 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-26 16:56:29,129 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 499 flow [2023-08-26 16:56:29,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=499, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2023-08-26 16:56:29,129 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2023-08-26 16:56:29,129 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 499 flow [2023-08-26 16:56:29,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 109.625) internal successors, (877), 8 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 16:56:29,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:29,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:29,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-26 16:56:29,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 16:56:29,336 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:29,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:29,336 INFO L85 PathProgramCache]: Analyzing trace with hash -403587429, now seen corresponding path program 1 times [2023-08-26 16:56:29,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:29,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160762501] [2023-08-26 16:56:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:29,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:29,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:29,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160762501] [2023-08-26 16:56:29,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160762501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:29,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:29,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:56:29,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331991841] [2023-08-26 16:56:29,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:29,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:56:29,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:29,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:56:29,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:56:29,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:29,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 499 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:29,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:29,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:29,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:30,053 INFO L124 PetriNetUnfolderBase]: 6292/8173 cut-off events. [2023-08-26 16:56:30,053 INFO L125 PetriNetUnfolderBase]: For 46895/49249 co-relation queries the response was YES. [2023-08-26 16:56:30,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36505 conditions, 8173 events. 6292/8173 cut-off events. For 46895/49249 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 35708 event pairs, 1595 based on Foata normal form. 740/8746 useless extension candidates. Maximal degree in co-relation 36484. Up to 4954 conditions per place. [2023-08-26 16:56:30,115 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 117 selfloop transitions, 36 changer transitions 4/162 dead transitions. [2023-08-26 16:56:30,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 162 transitions, 1529 flow [2023-08-26 16:56:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:56:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:56:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 592 transitions. [2023-08-26 16:56:30,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070038910505834 [2023-08-26 16:56:30,118 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 592 transitions. [2023-08-26 16:56:30,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 592 transitions. [2023-08-26 16:56:30,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:30,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 592 transitions. [2023-08-26 16:56:30,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.4) internal successors, (592), 5 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:30,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:30,121 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:30,122 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 499 flow. Second operand 5 states and 592 transitions. [2023-08-26 16:56:30,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 162 transitions, 1529 flow [2023-08-26 16:56:30,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 162 transitions, 1477 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 16:56:30,202 INFO L231 Difference]: Finished difference. Result has 79 places, 85 transitions, 751 flow [2023-08-26 16:56:30,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=751, PETRI_PLACES=79, PETRI_TRANSITIONS=85} [2023-08-26 16:56:30,203 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2023-08-26 16:56:30,203 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 85 transitions, 751 flow [2023-08-26 16:56:30,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:30,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:30,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:30,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 16:56:30,204 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:30,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:30,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1550521841, now seen corresponding path program 2 times [2023-08-26 16:56:30,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:30,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487717211] [2023-08-26 16:56:30,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:30,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:30,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:30,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487717211] [2023-08-26 16:56:30,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487717211] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:30,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:30,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:56:30,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969669107] [2023-08-26 16:56:30,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:30,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:56:30,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:30,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:56:30,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:56:30,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:30,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 85 transitions, 751 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:30,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:30,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:30,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:31,027 INFO L124 PetriNetUnfolderBase]: 7155/9418 cut-off events. [2023-08-26 16:56:31,027 INFO L125 PetriNetUnfolderBase]: For 58239/58813 co-relation queries the response was YES. [2023-08-26 16:56:31,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47072 conditions, 9418 events. 7155/9418 cut-off events. For 58239/58813 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 45033 event pairs, 1354 based on Foata normal form. 752/9919 useless extension candidates. Maximal degree in co-relation 47049. Up to 4615 conditions per place. [2023-08-26 16:56:31,100 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 164 selfloop transitions, 14 changer transitions 3/186 dead transitions. [2023-08-26 16:56:31,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 186 transitions, 1899 flow [2023-08-26 16:56:31,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:56:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:56:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 603 transitions. [2023-08-26 16:56:31,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46926070038910506 [2023-08-26 16:56:31,103 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 603 transitions. [2023-08-26 16:56:31,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 603 transitions. [2023-08-26 16:56:31,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:31,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 603 transitions. [2023-08-26 16:56:31,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.6) internal successors, (603), 5 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:31,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:31,107 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:31,107 INFO L175 Difference]: Start difference. First operand has 79 places, 85 transitions, 751 flow. Second operand 5 states and 603 transitions. [2023-08-26 16:56:31,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 186 transitions, 1899 flow [2023-08-26 16:56:31,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 186 transitions, 1811 flow, removed 44 selfloop flow, removed 0 redundant places. [2023-08-26 16:56:31,260 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 841 flow [2023-08-26 16:56:31,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2023-08-26 16:56:31,260 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 31 predicate places. [2023-08-26 16:56:31,260 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 841 flow [2023-08-26 16:56:31,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:31,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:31,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:31,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 16:56:31,261 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:31,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:31,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1961318210, now seen corresponding path program 4 times [2023-08-26 16:56:31,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:31,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084137103] [2023-08-26 16:56:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:31,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:31,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084137103] [2023-08-26 16:56:31,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084137103] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:56:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335822441] [2023-08-26 16:56:31,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:56:31,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:56:31,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:56:31,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:56:31,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 16:56:31,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:56:31,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:56:31,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 16:56:31,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:56:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:31,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:56:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:31,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335822441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:56:31,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:56:31,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 16:56:31,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959552170] [2023-08-26 16:56:31,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:56:31,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 16:56:31,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:31,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 16:56:31,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-26 16:56:31,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:31,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 841 flow. Second operand has 10 states, 10 states have (on average 108.5) internal successors, (1085), 10 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:31,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:31,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:31,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:32,452 INFO L124 PetriNetUnfolderBase]: 8142/10639 cut-off events. [2023-08-26 16:56:32,452 INFO L125 PetriNetUnfolderBase]: For 70944/71577 co-relation queries the response was YES. [2023-08-26 16:56:32,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53519 conditions, 10639 events. 8142/10639 cut-off events. For 70944/71577 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 49092 event pairs, 1633 based on Foata normal form. 770/11145 useless extension candidates. Maximal degree in co-relation 53493. Up to 5944 conditions per place. [2023-08-26 16:56:32,521 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 129 selfloop transitions, 72 changer transitions 3/208 dead transitions. [2023-08-26 16:56:32,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 208 transitions, 2228 flow [2023-08-26 16:56:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 16:56:32,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 16:56:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 712 transitions. [2023-08-26 16:56:32,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46173800259403375 [2023-08-26 16:56:32,525 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 712 transitions. [2023-08-26 16:56:32,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 712 transitions. [2023-08-26 16:56:32,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:32,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 712 transitions. [2023-08-26 16:56:32,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.66666666666667) internal successors, (712), 6 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:32,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 257.0) internal successors, (1799), 7 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:32,529 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 257.0) internal successors, (1799), 7 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:32,529 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 841 flow. Second operand 6 states and 712 transitions. [2023-08-26 16:56:32,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 208 transitions, 2228 flow [2023-08-26 16:56:32,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 208 transitions, 2118 flow, removed 30 selfloop flow, removed 2 redundant places. [2023-08-26 16:56:32,838 INFO L231 Difference]: Finished difference. Result has 91 places, 125 transitions, 1452 flow [2023-08-26 16:56:32,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1452, PETRI_PLACES=91, PETRI_TRANSITIONS=125} [2023-08-26 16:56:32,838 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 37 predicate places. [2023-08-26 16:56:32,838 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 125 transitions, 1452 flow [2023-08-26 16:56:32,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 108.5) internal successors, (1085), 10 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:32,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:32,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:32,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 16:56:33,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 16:56:33,045 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:33,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:33,045 INFO L85 PathProgramCache]: Analyzing trace with hash 645102934, now seen corresponding path program 3 times [2023-08-26 16:56:33,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:33,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431736823] [2023-08-26 16:56:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:33,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:33,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:33,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431736823] [2023-08-26 16:56:33,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431736823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:33,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:33,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:56:33,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955446793] [2023-08-26 16:56:33,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:33,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:56:33,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:33,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:56:33,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:56:33,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:33,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 125 transitions, 1452 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:33,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:33,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:33,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:33,989 INFO L124 PetriNetUnfolderBase]: 8944/11693 cut-off events. [2023-08-26 16:56:33,989 INFO L125 PetriNetUnfolderBase]: For 90715/92308 co-relation queries the response was YES. [2023-08-26 16:56:34,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65164 conditions, 11693 events. 8944/11693 cut-off events. For 90715/92308 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 55304 event pairs, 2267 based on Foata normal form. 1128/12306 useless extension candidates. Maximal degree in co-relation 65135. Up to 8788 conditions per place. [2023-08-26 16:56:34,080 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 165 selfloop transitions, 31 changer transitions 2/210 dead transitions. [2023-08-26 16:56:34,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 210 transitions, 2634 flow [2023-08-26 16:56:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:56:34,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:56:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 592 transitions. [2023-08-26 16:56:34,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070038910505834 [2023-08-26 16:56:34,082 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 592 transitions. [2023-08-26 16:56:34,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 592 transitions. [2023-08-26 16:56:34,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:34,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 592 transitions. [2023-08-26 16:56:34,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.4) internal successors, (592), 5 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:34,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:34,086 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:34,087 INFO L175 Difference]: Start difference. First operand has 91 places, 125 transitions, 1452 flow. Second operand 5 states and 592 transitions. [2023-08-26 16:56:34,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 210 transitions, 2634 flow [2023-08-26 16:56:34,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 210 transitions, 2433 flow, removed 54 selfloop flow, removed 1 redundant places. [2023-08-26 16:56:34,700 INFO L231 Difference]: Finished difference. Result has 97 places, 136 transitions, 1535 flow [2023-08-26 16:56:34,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1535, PETRI_PLACES=97, PETRI_TRANSITIONS=136} [2023-08-26 16:56:34,701 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2023-08-26 16:56:34,701 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 136 transitions, 1535 flow [2023-08-26 16:56:34,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:34,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:34,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:34,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 16:56:34,702 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:34,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:34,702 INFO L85 PathProgramCache]: Analyzing trace with hash -184001736, now seen corresponding path program 5 times [2023-08-26 16:56:34,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:34,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892479833] [2023-08-26 16:56:34,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:34,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:34,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:34,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892479833] [2023-08-26 16:56:34,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892479833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:34,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:34,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:56:34,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049085859] [2023-08-26 16:56:34,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:34,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:56:34,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:34,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:56:34,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:56:34,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:34,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 136 transitions, 1535 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:34,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:34,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:34,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:35,902 INFO L124 PetriNetUnfolderBase]: 9291/12136 cut-off events. [2023-08-26 16:56:35,903 INFO L125 PetriNetUnfolderBase]: For 100681/102217 co-relation queries the response was YES. [2023-08-26 16:56:35,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68536 conditions, 12136 events. 9291/12136 cut-off events. For 100681/102217 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 57905 event pairs, 1007 based on Foata normal form. 1191/12902 useless extension candidates. Maximal degree in co-relation 68504. Up to 5296 conditions per place. [2023-08-26 16:56:36,047 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 193 selfloop transitions, 28 changer transitions 1/234 dead transitions. [2023-08-26 16:56:36,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 234 transitions, 2830 flow [2023-08-26 16:56:36,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:56:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:56:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 601 transitions. [2023-08-26 16:56:36,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467704280155642 [2023-08-26 16:56:36,049 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 601 transitions. [2023-08-26 16:56:36,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 601 transitions. [2023-08-26 16:56:36,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:36,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 601 transitions. [2023-08-26 16:56:36,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:36,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:36,051 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:36,052 INFO L175 Difference]: Start difference. First operand has 97 places, 136 transitions, 1535 flow. Second operand 5 states and 601 transitions. [2023-08-26 16:56:36,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 234 transitions, 2830 flow [2023-08-26 16:56:36,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 234 transitions, 2770 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-08-26 16:56:36,326 INFO L231 Difference]: Finished difference. Result has 102 places, 138 transitions, 1575 flow [2023-08-26 16:56:36,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1575, PETRI_PLACES=102, PETRI_TRANSITIONS=138} [2023-08-26 16:56:36,327 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2023-08-26 16:56:36,327 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 138 transitions, 1575 flow [2023-08-26 16:56:36,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:36,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:36,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:36,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 16:56:36,328 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:36,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:36,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1354076020, now seen corresponding path program 4 times [2023-08-26 16:56:36,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:36,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503201690] [2023-08-26 16:56:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:36,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:36,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:36,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503201690] [2023-08-26 16:56:36,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503201690] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:56:36,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519211037] [2023-08-26 16:56:36,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:56:36,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:56:36,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:56:36,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:56:36,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 16:56:36,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:56:36,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:56:36,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 16:56:36,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:56:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:36,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:56:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:36,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519211037] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:56:36,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:56:36,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 16:56:36,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517336379] [2023-08-26 16:56:36,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:56:36,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 16:56:36,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:36,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 16:56:36,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-26 16:56:36,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:36,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 138 transitions, 1575 flow. Second operand has 10 states, 10 states have (on average 108.9) internal successors, (1089), 10 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:36,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:36,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:36,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:38,128 INFO L124 PetriNetUnfolderBase]: 11775/15277 cut-off events. [2023-08-26 16:56:38,128 INFO L125 PetriNetUnfolderBase]: For 139817/141231 co-relation queries the response was YES. [2023-08-26 16:56:38,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88353 conditions, 15277 events. 11775/15277 cut-off events. For 139817/141231 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 73429 event pairs, 1375 based on Foata normal form. 1475/16440 useless extension candidates. Maximal degree in co-relation 88318. Up to 7741 conditions per place. [2023-08-26 16:56:38,256 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 277 selfloop transitions, 122 changer transitions 5/412 dead transitions. [2023-08-26 16:56:38,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 412 transitions, 5194 flow [2023-08-26 16:56:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 16:56:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 16:56:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1174 transitions. [2023-08-26 16:56:38,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45680933852140077 [2023-08-26 16:56:38,260 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1174 transitions. [2023-08-26 16:56:38,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1174 transitions. [2023-08-26 16:56:38,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:38,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1174 transitions. [2023-08-26 16:56:38,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 117.4) internal successors, (1174), 10 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:38,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 257.0) internal successors, (2827), 11 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:38,267 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 257.0) internal successors, (2827), 11 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:38,267 INFO L175 Difference]: Start difference. First operand has 102 places, 138 transitions, 1575 flow. Second operand 10 states and 1174 transitions. [2023-08-26 16:56:38,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 412 transitions, 5194 flow [2023-08-26 16:56:38,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 412 transitions, 5090 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-26 16:56:38,775 INFO L231 Difference]: Finished difference. Result has 115 places, 226 transitions, 3178 flow [2023-08-26 16:56:38,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3178, PETRI_PLACES=115, PETRI_TRANSITIONS=226} [2023-08-26 16:56:38,776 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 61 predicate places. [2023-08-26 16:56:38,776 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 226 transitions, 3178 flow [2023-08-26 16:56:38,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 108.9) internal successors, (1089), 10 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:38,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:38,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:38,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 16:56:38,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:56:38,983 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:38,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:38,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1953638462, now seen corresponding path program 5 times [2023-08-26 16:56:38,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:38,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346848669] [2023-08-26 16:56:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:38,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:39,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:39,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346848669] [2023-08-26 16:56:39,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346848669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:39,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:39,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:56:39,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925513006] [2023-08-26 16:56:39,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:39,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:56:39,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:39,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:56:39,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:56:39,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:39,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 226 transitions, 3178 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:39,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:39,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:39,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:39,800 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([387] $Ultimate##0-->L62-4: Formula: (= v_thread3Thread1of1ForFork1_~i~2_1 0) InVars {} OutVars{thread3Thread1of1ForFork1_~i~2=v_thread3Thread1of1ForFork1_~i~2_1} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_~i~2][45], [Black: 381#(= thread1Thread1of1ForFork0_~i~0 0), Black: 382#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 161#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), 104#L92-1true, 186#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1), 153#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), 177#(and (or (and (not (= |ULTIMATE.start_main_~#t2~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_main_~#t3~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (<= 4 (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|))) (= (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|) 4)) (= |ULTIMATE.start_main_~#t1~0#1.offset| 0)), 794#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= thread3Thread1of1ForFork1_~i~2 0)), Black: 757#(= thread1Thread1of1ForFork0_~i~0 0), Black: 758#(and (= thread1Thread1of1ForFork0_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 759#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 916#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 798#(and (<= thread3Thread1of1ForFork1_~i~2 0) (<= 1 ~N~0)), 16#L72-4true, Black: 390#(<= 1 ~N~0), Black: 391#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 546#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|)), 148#true, Black: 549#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), 173#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), 364#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 558#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), 40#L51-4true, Black: 567#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 169#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), 123#L41-4true, Black: 566#(<= ~N~0 0), Black: 190#(= ~counter2~0 ~counter1~0), 42#L62-4true, 573#(= thread3Thread1of1ForFork1_~i~2 0), Black: 195#(= thread1Thread1of1ForFork0_~i~0 0), Black: 196#(<= ~N~0 0), 157#(and (= 4 (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_main_~#t2~0#1.offset| 0)), Black: 197#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= ~N~0 0)), 928#(= thread3Thread1of1ForFork1_~i~2 0), 165#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), Black: 574#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 732#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 741#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 740#(= |thread2Thread1of1ForFork2_~i~1#1| 0), 557#(= thread3Thread1of1ForFork1_~i~2 0), Black: 742#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 205#(<= 1 ~N~0), Black: 361#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0)), Black: 206#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 750#(<= 1 ~N~0), Black: 751#(and (<= 1 ~N~0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 373#(<= ~N~0 0), Black: 374#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0))]) [2023-08-26 16:56:39,801 INFO L294 olderBase$Statistics]: this new event has 15 ancestors and is cut-off event [2023-08-26 16:56:39,801 INFO L297 olderBase$Statistics]: existing Event has 14 ancestors and is cut-off event [2023-08-26 16:56:39,801 INFO L297 olderBase$Statistics]: existing Event has 15 ancestors and is cut-off event [2023-08-26 16:56:39,801 INFO L297 olderBase$Statistics]: existing Event has 14 ancestors and is cut-off event [2023-08-26 16:56:40,037 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([387] $Ultimate##0-->L62-4: Formula: (= v_thread3Thread1of1ForFork1_~i~2_1 0) InVars {} OutVars{thread3Thread1of1ForFork1_~i~2=v_thread3Thread1of1ForFork1_~i~2_1} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_~i~2][69], [Black: 381#(= thread1Thread1of1ForFork0_~i~0 0), Black: 382#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 161#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), 104#L92-1true, 186#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1), 153#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), 177#(and (or (and (not (= |ULTIMATE.start_main_~#t2~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_main_~#t3~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (<= 4 (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|))) (= (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|) 4)) (= |ULTIMATE.start_main_~#t1~0#1.offset| 0)), Black: 757#(= thread1Thread1of1ForFork0_~i~0 0), Black: 794#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= thread3Thread1of1ForFork1_~i~2 0)), Black: 758#(and (= thread1Thread1of1ForFork0_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 759#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 916#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 798#(and (<= thread3Thread1of1ForFork1_~i~2 0) (<= 1 ~N~0)), Black: 390#(<= 1 ~N~0), 16#L72-4true, Black: 391#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 546#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|)), 148#true, Black: 549#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), 173#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), 755#true, 40#L51-4true, Black: 558#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 567#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 169#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), 76#thread1EXITtrue, Black: 566#(<= ~N~0 0), 206#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 190#(= ~counter2~0 ~counter1~0), 42#L62-4true, 573#(= thread3Thread1of1ForFork1_~i~2 0), Black: 195#(= thread1Thread1of1ForFork0_~i~0 0), Black: 196#(<= ~N~0 0), 157#(and (= 4 (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_main_~#t2~0#1.offset| 0)), Black: 197#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= ~N~0 0)), 928#(= thread3Thread1of1ForFork1_~i~2 0), 165#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), Black: 574#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 732#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 741#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 740#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 742#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), 557#(= thread3Thread1of1ForFork1_~i~2 0), Black: 205#(<= 1 ~N~0), Black: 361#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0)), Black: 364#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 750#(<= 1 ~N~0), Black: 751#(and (<= 1 ~N~0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 373#(<= ~N~0 0), Black: 374#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0))]) [2023-08-26 16:56:40,037 INFO L294 olderBase$Statistics]: this new event has 16 ancestors and is cut-off event [2023-08-26 16:56:40,037 INFO L297 olderBase$Statistics]: existing Event has 16 ancestors and is cut-off event [2023-08-26 16:56:40,037 INFO L297 olderBase$Statistics]: existing Event has 15 ancestors and is cut-off event [2023-08-26 16:56:40,037 INFO L297 olderBase$Statistics]: existing Event has 15 ancestors and is cut-off event [2023-08-26 16:56:40,378 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([387] $Ultimate##0-->L62-4: Formula: (= v_thread3Thread1of1ForFork1_~i~2_1 0) InVars {} OutVars{thread3Thread1of1ForFork1_~i~2=v_thread3Thread1of1ForFork1_~i~2_1} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_~i~2][69], [Black: 381#(= thread1Thread1of1ForFork0_~i~0 0), Black: 382#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 161#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), 186#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1), 153#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), 177#(and (or (and (not (= |ULTIMATE.start_main_~#t2~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_main_~#t3~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (<= 4 (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|))) (= (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|) 4)) (= |ULTIMATE.start_main_~#t1~0#1.offset| 0)), Black: 757#(= thread1Thread1of1ForFork0_~i~0 0), Black: 794#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= thread3Thread1of1ForFork1_~i~2 0)), Black: 758#(and (= thread1Thread1of1ForFork0_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 759#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 916#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 798#(and (<= thread3Thread1of1ForFork1_~i~2 0) (<= 1 ~N~0)), 16#L72-4true, Black: 390#(<= 1 ~N~0), Black: 391#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 546#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|)), 148#true, Black: 549#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), 173#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), 755#true, 40#L51-4true, Black: 558#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 567#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 169#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), Black: 566#(<= ~N~0 0), 206#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 190#(= ~counter2~0 ~counter1~0), 42#L62-4true, Black: 195#(= thread1Thread1of1ForFork0_~i~0 0), 573#(= thread3Thread1of1ForFork1_~i~2 0), Black: 196#(<= ~N~0 0), 157#(and (= 4 (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_main_~#t2~0#1.offset| 0)), Black: 197#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= ~N~0 0)), 928#(= thread3Thread1of1ForFork1_~i~2 0), 165#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), Black: 574#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 732#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), 59#L92-2true, Black: 741#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 740#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 742#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), 557#(= thread3Thread1of1ForFork1_~i~2 0), Black: 205#(<= 1 ~N~0), Black: 361#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0)), Black: 364#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 750#(<= 1 ~N~0), Black: 751#(and (<= 1 ~N~0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 373#(<= ~N~0 0), Black: 374#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0))]) [2023-08-26 16:56:40,378 INFO L294 olderBase$Statistics]: this new event has 17 ancestors and is cut-off event [2023-08-26 16:56:40,378 INFO L297 olderBase$Statistics]: existing Event has 16 ancestors and is cut-off event [2023-08-26 16:56:40,378 INFO L297 olderBase$Statistics]: existing Event has 16 ancestors and is cut-off event [2023-08-26 16:56:40,379 INFO L297 olderBase$Statistics]: existing Event has 17 ancestors and is cut-off event [2023-08-26 16:56:40,644 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([387] $Ultimate##0-->L62-4: Formula: (= v_thread3Thread1of1ForFork1_~i~2_1 0) InVars {} OutVars{thread3Thread1of1ForFork1_~i~2=v_thread3Thread1of1ForFork1_~i~2_1} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_~i~2][69], [Black: 381#(= thread1Thread1of1ForFork0_~i~0 0), Black: 382#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 161#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), 186#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1), 153#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), 177#(and (or (and (not (= |ULTIMATE.start_main_~#t2~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_main_~#t3~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (<= 4 (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|))) (= (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|) 4)) (= |ULTIMATE.start_main_~#t1~0#1.offset| 0)), Black: 757#(= thread1Thread1of1ForFork0_~i~0 0), Black: 794#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= thread3Thread1of1ForFork1_~i~2 0)), Black: 758#(and (= thread1Thread1of1ForFork0_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 759#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 916#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 798#(and (<= thread3Thread1of1ForFork1_~i~2 0) (<= 1 ~N~0)), 16#L72-4true, Black: 390#(<= 1 ~N~0), Black: 391#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 546#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|)), 148#true, Black: 549#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), 173#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), 755#true, 40#L51-4true, Black: 558#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 567#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 169#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), Black: 566#(<= ~N~0 0), 206#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 190#(= ~counter2~0 ~counter1~0), 111#L93-1true, 42#L62-4true, Black: 195#(= thread1Thread1of1ForFork0_~i~0 0), 573#(= thread3Thread1of1ForFork1_~i~2 0), Black: 196#(<= ~N~0 0), 157#(and (= 4 (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_main_~#t2~0#1.offset| 0)), Black: 197#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= ~N~0 0)), 928#(= thread3Thread1of1ForFork1_~i~2 0), 165#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), Black: 574#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 732#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 741#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 740#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 742#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), 557#(= thread3Thread1of1ForFork1_~i~2 0), Black: 205#(<= 1 ~N~0), Black: 361#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0)), Black: 364#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 750#(<= 1 ~N~0), Black: 751#(and (<= 1 ~N~0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 373#(<= ~N~0 0), Black: 374#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0))]) [2023-08-26 16:56:40,644 INFO L294 olderBase$Statistics]: this new event has 18 ancestors and is cut-off event [2023-08-26 16:56:40,644 INFO L297 olderBase$Statistics]: existing Event has 18 ancestors and is cut-off event [2023-08-26 16:56:40,644 INFO L297 olderBase$Statistics]: existing Event has 17 ancestors and is cut-off event [2023-08-26 16:56:40,644 INFO L297 olderBase$Statistics]: existing Event has 17 ancestors and is cut-off event [2023-08-26 16:56:40,939 INFO L124 PetriNetUnfolderBase]: 12667/16665 cut-off events. [2023-08-26 16:56:40,939 INFO L125 PetriNetUnfolderBase]: For 183008/184531 co-relation queries the response was YES. [2023-08-26 16:56:41,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104804 conditions, 16665 events. 12667/16665 cut-off events. For 183008/184531 co-relation queries the response was YES. Maximal size of possible extension queue 856. Compared 83363 event pairs, 2320 based on Foata normal form. 1243/17570 useless extension candidates. Maximal degree in co-relation 104763. Up to 7228 conditions per place. [2023-08-26 16:56:41,083 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 179 selfloop transitions, 141 changer transitions 3/331 dead transitions. [2023-08-26 16:56:41,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 331 transitions, 4907 flow [2023-08-26 16:56:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:56:41,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:56:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 595 transitions. [2023-08-26 16:56:41,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46303501945525294 [2023-08-26 16:56:41,085 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 595 transitions. [2023-08-26 16:56:41,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 595 transitions. [2023-08-26 16:56:41,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:41,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 595 transitions. [2023-08-26 16:56:41,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:41,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:41,089 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:41,089 INFO L175 Difference]: Start difference. First operand has 115 places, 226 transitions, 3178 flow. Second operand 5 states and 595 transitions. [2023-08-26 16:56:41,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 331 transitions, 4907 flow [2023-08-26 16:56:42,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 331 transitions, 4520 flow, removed 115 selfloop flow, removed 3 redundant places. [2023-08-26 16:56:42,187 INFO L231 Difference]: Finished difference. Result has 118 places, 234 transitions, 3290 flow [2023-08-26 16:56:42,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=2834, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3290, PETRI_PLACES=118, PETRI_TRANSITIONS=234} [2023-08-26 16:56:42,188 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2023-08-26 16:56:42,188 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 234 transitions, 3290 flow [2023-08-26 16:56:42,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:42,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:42,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:42,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 16:56:42,189 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:42,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:42,189 INFO L85 PathProgramCache]: Analyzing trace with hash -665742615, now seen corresponding path program 3 times [2023-08-26 16:56:42,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:42,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841326607] [2023-08-26 16:56:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:42,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:42,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:42,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841326607] [2023-08-26 16:56:42,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841326607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:42,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:42,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:56:42,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735173488] [2023-08-26 16:56:42,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:42,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:56:42,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:42,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:56:42,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:56:42,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:42,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 234 transitions, 3290 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:42,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:42,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:42,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:44,359 INFO L124 PetriNetUnfolderBase]: 12921/17091 cut-off events. [2023-08-26 16:56:44,360 INFO L125 PetriNetUnfolderBase]: For 207593/209071 co-relation queries the response was YES. [2023-08-26 16:56:44,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105839 conditions, 17091 events. 12921/17091 cut-off events. For 207593/209071 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 86131 event pairs, 1919 based on Foata normal form. 1167/17931 useless extension candidates. Maximal degree in co-relation 105796. Up to 7472 conditions per place. [2023-08-26 16:56:44,497 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 178 selfloop transitions, 138 changer transitions 1/326 dead transitions. [2023-08-26 16:56:44,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 326 transitions, 4825 flow [2023-08-26 16:56:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:56:44,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:56:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 599 transitions. [2023-08-26 16:56:44,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466147859922179 [2023-08-26 16:56:44,499 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 599 transitions. [2023-08-26 16:56:44,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 599 transitions. [2023-08-26 16:56:44,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:44,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 599 transitions. [2023-08-26 16:56:44,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:44,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:44,502 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:44,502 INFO L175 Difference]: Start difference. First operand has 118 places, 234 transitions, 3290 flow. Second operand 5 states and 599 transitions. [2023-08-26 16:56:44,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 326 transitions, 4825 flow [2023-08-26 16:56:45,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 326 transitions, 4568 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 16:56:45,532 INFO L231 Difference]: Finished difference. Result has 122 places, 239 transitions, 3513 flow [2023-08-26 16:56:45,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3513, PETRI_PLACES=122, PETRI_TRANSITIONS=239} [2023-08-26 16:56:45,533 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2023-08-26 16:56:45,533 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 239 transitions, 3513 flow [2023-08-26 16:56:45,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:45,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:45,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:45,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 16:56:45,534 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:45,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:45,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1776227434, now seen corresponding path program 1 times [2023-08-26 16:56:45,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:45,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321404177] [2023-08-26 16:56:45,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:45,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:45,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:45,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321404177] [2023-08-26 16:56:45,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321404177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:45,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:45,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:56:45,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193753495] [2023-08-26 16:56:45,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:45,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:56:45,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:45,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:56:45,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:56:45,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:45,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 239 transitions, 3513 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:45,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:45,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:45,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:47,850 INFO L124 PetriNetUnfolderBase]: 14316/18973 cut-off events. [2023-08-26 16:56:47,851 INFO L125 PetriNetUnfolderBase]: For 258770/260810 co-relation queries the response was YES. [2023-08-26 16:56:47,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119747 conditions, 18973 events. 14316/18973 cut-off events. For 258770/260810 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 95322 event pairs, 2882 based on Foata normal form. 1343/20112 useless extension candidates. Maximal degree in co-relation 119702. Up to 10778 conditions per place. [2023-08-26 16:56:47,999 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 344 selfloop transitions, 35 changer transitions 7/406 dead transitions. [2023-08-26 16:56:47,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 406 transitions, 6432 flow [2023-08-26 16:56:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:56:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:56:48,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 601 transitions. [2023-08-26 16:56:48,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467704280155642 [2023-08-26 16:56:48,001 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 601 transitions. [2023-08-26 16:56:48,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 601 transitions. [2023-08-26 16:56:48,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:48,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 601 transitions. [2023-08-26 16:56:48,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:48,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:48,003 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:48,003 INFO L175 Difference]: Start difference. First operand has 122 places, 239 transitions, 3513 flow. Second operand 5 states and 601 transitions. [2023-08-26 16:56:48,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 406 transitions, 6432 flow [2023-08-26 16:56:49,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 406 transitions, 6152 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-26 16:56:49,459 INFO L231 Difference]: Finished difference. Result has 126 places, 243 transitions, 3457 flow [2023-08-26 16:56:49,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3336, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3457, PETRI_PLACES=126, PETRI_TRANSITIONS=243} [2023-08-26 16:56:49,460 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 72 predicate places. [2023-08-26 16:56:49,460 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 243 transitions, 3457 flow [2023-08-26 16:56:49,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:49,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:49,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:49,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 16:56:49,460 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:49,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:49,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1423703512, now seen corresponding path program 2 times [2023-08-26 16:56:49,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:49,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450591117] [2023-08-26 16:56:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:49,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:49,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:49,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450591117] [2023-08-26 16:56:49,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450591117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:49,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:49,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:56:49,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955478383] [2023-08-26 16:56:49,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:49,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:56:49,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:49,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:56:49,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:56:49,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:49,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 243 transitions, 3457 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:49,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:49,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:49,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:52,141 INFO L124 PetriNetUnfolderBase]: 16829/22112 cut-off events. [2023-08-26 16:56:52,141 INFO L125 PetriNetUnfolderBase]: For 316186/320223 co-relation queries the response was YES. [2023-08-26 16:56:52,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146882 conditions, 22112 events. 16829/22112 cut-off events. For 316186/320223 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 111891 event pairs, 3003 based on Foata normal form. 2143/24089 useless extension candidates. Maximal degree in co-relation 146835. Up to 10675 conditions per place. [2023-08-26 16:56:52,337 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 229 selfloop transitions, 187 changer transitions 1/432 dead transitions. [2023-08-26 16:56:52,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 432 transitions, 6842 flow [2023-08-26 16:56:52,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:56:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:56:52,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-08-26 16:56:52,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622568093385214 [2023-08-26 16:56:52,338 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-08-26 16:56:52,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-08-26 16:56:52,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:52,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-08-26 16:56:52,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:52,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:52,340 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:52,340 INFO L175 Difference]: Start difference. First operand has 126 places, 243 transitions, 3457 flow. Second operand 5 states and 594 transitions. [2023-08-26 16:56:52,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 432 transitions, 6842 flow [2023-08-26 16:56:53,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 432 transitions, 6728 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 16:56:53,869 INFO L231 Difference]: Finished difference. Result has 128 places, 291 transitions, 4541 flow [2023-08-26 16:56:53,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3403, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4541, PETRI_PLACES=128, PETRI_TRANSITIONS=291} [2023-08-26 16:56:53,869 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 74 predicate places. [2023-08-26 16:56:53,869 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 291 transitions, 4541 flow [2023-08-26 16:56:53,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:53,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:53,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:53,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 16:56:53,870 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:53,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:53,870 INFO L85 PathProgramCache]: Analyzing trace with hash -30266634, now seen corresponding path program 3 times [2023-08-26 16:56:53,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:53,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039477519] [2023-08-26 16:56:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:53,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:53,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:53,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039477519] [2023-08-26 16:56:53,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039477519] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:56:53,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:56:53,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:56:53,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860705152] [2023-08-26 16:56:53,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:56:53,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:56:53,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:56:53,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:56:53,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:53,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 291 transitions, 4541 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:53,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:53,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:53,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:56:56,768 INFO L124 PetriNetUnfolderBase]: 16968/22430 cut-off events. [2023-08-26 16:56:56,769 INFO L125 PetriNetUnfolderBase]: For 319682/323025 co-relation queries the response was YES. [2023-08-26 16:56:56,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152582 conditions, 22430 events. 16968/22430 cut-off events. For 319682/323025 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 114686 event pairs, 3392 based on Foata normal form. 1768/24027 useless extension candidates. Maximal degree in co-relation 152535. Up to 11218 conditions per place. [2023-08-26 16:56:56,959 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 204 selfloop transitions, 185 changer transitions 6/410 dead transitions. [2023-08-26 16:56:56,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 410 transitions, 6667 flow [2023-08-26 16:56:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:56:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:56:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 599 transitions. [2023-08-26 16:56:56,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466147859922179 [2023-08-26 16:56:56,960 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 599 transitions. [2023-08-26 16:56:56,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 599 transitions. [2023-08-26 16:56:56,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:56:56,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 599 transitions. [2023-08-26 16:56:56,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:56,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:56,963 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:56,963 INFO L175 Difference]: Start difference. First operand has 128 places, 291 transitions, 4541 flow. Second operand 5 states and 599 transitions. [2023-08-26 16:56:56,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 410 transitions, 6667 flow [2023-08-26 16:56:58,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 410 transitions, 6423 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 16:56:58,764 INFO L231 Difference]: Finished difference. Result has 132 places, 295 transitions, 4732 flow [2023-08-26 16:56:58,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=4297, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4732, PETRI_PLACES=132, PETRI_TRANSITIONS=295} [2023-08-26 16:56:58,764 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 78 predicate places. [2023-08-26 16:56:58,764 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 295 transitions, 4732 flow [2023-08-26 16:56:58,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:58,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:56:58,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:56:58,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-26 16:56:58,765 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:56:58,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:56:58,765 INFO L85 PathProgramCache]: Analyzing trace with hash 914102409, now seen corresponding path program 4 times [2023-08-26 16:56:58,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:56:58,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168412495] [2023-08-26 16:56:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:56:58,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:56:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:56:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:58,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:56:58,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168412495] [2023-08-26 16:56:58,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168412495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:56:58,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339892168] [2023-08-26 16:56:58,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:56:58,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:56:58,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:56:58,825 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:56:58,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 16:56:58,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:56:58,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:56:58,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 16:56:58,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:56:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:58,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:56:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:56:58,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339892168] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:56:58,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:56:58,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 16:56:58,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970180595] [2023-08-26 16:56:58,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:56:58,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 16:56:58,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:56:58,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 16:56:58,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-26 16:56:58,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:56:58,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 295 transitions, 4732 flow. Second operand has 10 states, 10 states have (on average 108.8) internal successors, (1088), 10 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:56:58,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:56:58,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:56:58,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:57:01,765 INFO L124 PetriNetUnfolderBase]: 16656/21984 cut-off events. [2023-08-26 16:57:01,766 INFO L125 PetriNetUnfolderBase]: For 371383/373287 co-relation queries the response was YES. [2023-08-26 16:57:01,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152785 conditions, 21984 events. 16656/21984 cut-off events. For 371383/373287 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 114608 event pairs, 4188 based on Foata normal form. 1697/23218 useless extension candidates. Maximal degree in co-relation 152736. Up to 17094 conditions per place. [2023-08-26 16:57:02,207 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 323 selfloop transitions, 89 changer transitions 0/425 dead transitions. [2023-08-26 16:57:02,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 425 transitions, 7195 flow [2023-08-26 16:57:02,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 16:57:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 16:57:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 710 transitions. [2023-08-26 16:57:02,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604409857328145 [2023-08-26 16:57:02,209 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 710 transitions. [2023-08-26 16:57:02,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 710 transitions. [2023-08-26 16:57:02,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:57:02,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 710 transitions. [2023-08-26 16:57:02,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.33333333333333) internal successors, (710), 6 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:02,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 257.0) internal successors, (1799), 7 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:02,212 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 257.0) internal successors, (1799), 7 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:02,213 INFO L175 Difference]: Start difference. First operand has 132 places, 295 transitions, 4732 flow. Second operand 6 states and 710 transitions. [2023-08-26 16:57:02,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 425 transitions, 7195 flow [2023-08-26 16:57:04,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 425 transitions, 6767 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-26 16:57:04,032 INFO L231 Difference]: Finished difference. Result has 138 places, 353 transitions, 5791 flow [2023-08-26 16:57:04,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=4379, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5791, PETRI_PLACES=138, PETRI_TRANSITIONS=353} [2023-08-26 16:57:04,032 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2023-08-26 16:57:04,032 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 353 transitions, 5791 flow [2023-08-26 16:57:04,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 108.8) internal successors, (1088), 10 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:04,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:57:04,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:57:04,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 16:57:04,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 16:57:04,233 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:57:04,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:57:04,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1550069656, now seen corresponding path program 4 times [2023-08-26 16:57:04,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:57:04,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724593749] [2023-08-26 16:57:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:57:04,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:57:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:57:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:57:04,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:57:04,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724593749] [2023-08-26 16:57:04,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724593749] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:57:04,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:57:04,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:57:04,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986234695] [2023-08-26 16:57:04,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:57:04,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:57:04,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:57:04,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:57:04,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:57:04,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:57:04,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 353 transitions, 5791 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:04,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:57:04,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:57:04,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:57:07,906 INFO L124 PetriNetUnfolderBase]: 20744/27128 cut-off events. [2023-08-26 16:57:07,907 INFO L125 PetriNetUnfolderBase]: For 451113/455489 co-relation queries the response was YES. [2023-08-26 16:57:08,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192117 conditions, 27128 events. 20744/27128 cut-off events. For 451113/455489 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 139650 event pairs, 4482 based on Foata normal form. 2145/29018 useless extension candidates. Maximal degree in co-relation 192065. Up to 20710 conditions per place. [2023-08-26 16:57:08,229 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 490 selfloop transitions, 108 changer transitions 7/620 dead transitions. [2023-08-26 16:57:08,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 620 transitions, 11101 flow [2023-08-26 16:57:08,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:57:08,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:57:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-08-26 16:57:08,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622568093385214 [2023-08-26 16:57:08,231 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-08-26 16:57:08,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-08-26 16:57:08,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:57:08,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-08-26 16:57:08,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:08,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:08,234 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:08,234 INFO L175 Difference]: Start difference. First operand has 138 places, 353 transitions, 5791 flow. Second operand 5 states and 594 transitions. [2023-08-26 16:57:08,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 620 transitions, 11101 flow [2023-08-26 16:57:10,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 620 transitions, 10667 flow, removed 164 selfloop flow, removed 1 redundant places. [2023-08-26 16:57:10,556 INFO L231 Difference]: Finished difference. Result has 143 places, 447 transitions, 7742 flow [2023-08-26 16:57:10,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=5548, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7742, PETRI_PLACES=143, PETRI_TRANSITIONS=447} [2023-08-26 16:57:10,557 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 89 predicate places. [2023-08-26 16:57:10,557 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 447 transitions, 7742 flow [2023-08-26 16:57:10,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:10,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:57:10,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:57:10,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 16:57:10,557 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:57:10,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:57:10,558 INFO L85 PathProgramCache]: Analyzing trace with hash 73529112, now seen corresponding path program 5 times [2023-08-26 16:57:10,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:57:10,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308206473] [2023-08-26 16:57:10,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:57:10,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:57:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:57:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:57:10,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:57:10,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308206473] [2023-08-26 16:57:10,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308206473] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:57:10,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:57:10,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:57:10,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616394640] [2023-08-26 16:57:10,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:57:10,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:57:10,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:57:10,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:57:10,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:57:10,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:57:10,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 447 transitions, 7742 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:10,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:57:10,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:57:10,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:57:15,403 INFO L124 PetriNetUnfolderBase]: 25205/33163 cut-off events. [2023-08-26 16:57:15,403 INFO L125 PetriNetUnfolderBase]: For 596773/602780 co-relation queries the response was YES. [2023-08-26 16:57:15,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243434 conditions, 33163 events. 25205/33163 cut-off events. For 596773/602780 co-relation queries the response was YES. Maximal size of possible extension queue 1568. Compared 178568 event pairs, 2957 based on Foata normal form. 3063/36004 useless extension candidates. Maximal degree in co-relation 243380. Up to 14580 conditions per place. [2023-08-26 16:57:15,778 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 674 selfloop transitions, 94 changer transitions 7/790 dead transitions. [2023-08-26 16:57:15,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 790 transitions, 14702 flow [2023-08-26 16:57:15,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:57:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:57:15,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 597 transitions. [2023-08-26 16:57:15,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46459143968871597 [2023-08-26 16:57:15,779 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 597 transitions. [2023-08-26 16:57:15,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 597 transitions. [2023-08-26 16:57:15,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:57:15,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 597 transitions. [2023-08-26 16:57:15,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.4) internal successors, (597), 5 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:15,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:15,782 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:15,782 INFO L175 Difference]: Start difference. First operand has 143 places, 447 transitions, 7742 flow. Second operand 5 states and 597 transitions. [2023-08-26 16:57:15,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 790 transitions, 14702 flow [2023-08-26 16:57:19,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 790 transitions, 14646 flow, removed 28 selfloop flow, removed 0 redundant places. [2023-08-26 16:57:19,958 INFO L231 Difference]: Finished difference. Result has 149 places, 519 transitions, 9608 flow [2023-08-26 16:57:19,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=7698, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9608, PETRI_PLACES=149, PETRI_TRANSITIONS=519} [2023-08-26 16:57:19,959 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 95 predicate places. [2023-08-26 16:57:19,959 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 519 transitions, 9608 flow [2023-08-26 16:57:19,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:19,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:57:19,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:57:19,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 16:57:19,960 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:57:19,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:57:19,960 INFO L85 PathProgramCache]: Analyzing trace with hash -659779307, now seen corresponding path program 5 times [2023-08-26 16:57:19,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:57:19,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547214457] [2023-08-26 16:57:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:57:19,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:57:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:57:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:57:20,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:57:20,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547214457] [2023-08-26 16:57:20,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547214457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:57:20,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:57:20,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:57:20,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364062975] [2023-08-26 16:57:20,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:57:20,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:57:20,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:57:20,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:57:20,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:57:20,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:57:20,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 519 transitions, 9608 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:20,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:57:20,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:57:20,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:57:25,100 INFO L124 PetriNetUnfolderBase]: 25660/33979 cut-off events. [2023-08-26 16:57:25,100 INFO L125 PetriNetUnfolderBase]: For 666677/671674 co-relation queries the response was YES. [2023-08-26 16:57:25,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245054 conditions, 33979 events. 25660/33979 cut-off events. For 666677/671674 co-relation queries the response was YES. Maximal size of possible extension queue 1648. Compared 187426 event pairs, 5018 based on Foata normal form. 3171/36928 useless extension candidates. Maximal degree in co-relation 244997. Up to 20711 conditions per place. [2023-08-26 16:57:25,556 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 745 selfloop transitions, 35 changer transitions 43/838 dead transitions. [2023-08-26 16:57:25,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 838 transitions, 16351 flow [2023-08-26 16:57:25,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:57:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:57:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 595 transitions. [2023-08-26 16:57:25,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46303501945525294 [2023-08-26 16:57:25,559 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 595 transitions. [2023-08-26 16:57:25,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 595 transitions. [2023-08-26 16:57:25,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:57:25,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 595 transitions. [2023-08-26 16:57:25,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:25,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:25,561 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:25,562 INFO L175 Difference]: Start difference. First operand has 149 places, 519 transitions, 9608 flow. Second operand 5 states and 595 transitions. [2023-08-26 16:57:25,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 838 transitions, 16351 flow [2023-08-26 16:57:30,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 838 transitions, 16149 flow, removed 82 selfloop flow, removed 2 redundant places. [2023-08-26 16:57:30,317 INFO L231 Difference]: Finished difference. Result has 153 places, 532 transitions, 10016 flow [2023-08-26 16:57:30,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=9418, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10016, PETRI_PLACES=153, PETRI_TRANSITIONS=532} [2023-08-26 16:57:30,318 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2023-08-26 16:57:30,318 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 532 transitions, 10016 flow [2023-08-26 16:57:30,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:30,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:57:30,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:57:30,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-26 16:57:30,319 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:57:30,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:57:30,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1644744352, now seen corresponding path program 6 times [2023-08-26 16:57:30,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:57:30,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016589365] [2023-08-26 16:57:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:57:30,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:57:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:57:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:57:30,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:57:30,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016589365] [2023-08-26 16:57:30,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016589365] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:57:30,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:57:30,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:57:30,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034098041] [2023-08-26 16:57:30,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:57:30,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:57:30,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:57:30,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:57:30,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:57:30,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:57:30,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 532 transitions, 10016 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:30,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:57:30,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:57:30,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:57:35,278 INFO L124 PetriNetUnfolderBase]: 25328/33470 cut-off events. [2023-08-26 16:57:35,278 INFO L125 PetriNetUnfolderBase]: For 666607/672076 co-relation queries the response was YES. [2023-08-26 16:57:35,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244833 conditions, 33470 events. 25328/33470 cut-off events. For 666607/672076 co-relation queries the response was YES. Maximal size of possible extension queue 1598. Compared 181118 event pairs, 5589 based on Foata normal form. 2911/36197 useless extension candidates. Maximal degree in co-relation 244774. Up to 16165 conditions per place. [2023-08-26 16:57:35,721 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 225 selfloop transitions, 399 changer transitions 9/648 dead transitions. [2023-08-26 16:57:35,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 648 transitions, 12702 flow [2023-08-26 16:57:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:57:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:57:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-08-26 16:57:35,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622568093385214 [2023-08-26 16:57:35,723 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-08-26 16:57:35,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-08-26 16:57:35,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:57:35,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-08-26 16:57:35,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:35,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:35,725 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:35,725 INFO L175 Difference]: Start difference. First operand has 153 places, 532 transitions, 10016 flow. Second operand 5 states and 594 transitions. [2023-08-26 16:57:35,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 648 transitions, 12702 flow [2023-08-26 16:57:40,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 648 transitions, 12526 flow, removed 70 selfloop flow, removed 2 redundant places. [2023-08-26 16:57:40,918 INFO L231 Difference]: Finished difference. Result has 156 places, 532 transitions, 10647 flow [2023-08-26 16:57:40,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=9842, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10647, PETRI_PLACES=156, PETRI_TRANSITIONS=532} [2023-08-26 16:57:40,919 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 102 predicate places. [2023-08-26 16:57:40,919 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 532 transitions, 10647 flow [2023-08-26 16:57:40,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:40,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:57:40,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:57:40,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-26 16:57:40,920 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:57:40,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:57:40,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1998565941, now seen corresponding path program 6 times [2023-08-26 16:57:40,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:57:40,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779195682] [2023-08-26 16:57:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:57:40,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:57:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:57:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:57:40,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:57:40,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779195682] [2023-08-26 16:57:40,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779195682] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:57:40,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:57:40,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:57:40,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714854806] [2023-08-26 16:57:40,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:57:40,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:57:40,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:57:40,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:57:40,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:57:40,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:57:40,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 532 transitions, 10647 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:40,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:57:40,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:57:40,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:57:46,130 INFO L124 PetriNetUnfolderBase]: 24693/33039 cut-off events. [2023-08-26 16:57:46,130 INFO L125 PetriNetUnfolderBase]: For 722824/726065 co-relation queries the response was YES. [2023-08-26 16:57:46,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244565 conditions, 33039 events. 24693/33039 cut-off events. For 722824/726065 co-relation queries the response was YES. Maximal size of possible extension queue 1662. Compared 185588 event pairs, 5117 based on Foata normal form. 3164/35767 useless extension candidates. Maximal degree in co-relation 244505. Up to 19531 conditions per place. [2023-08-26 16:57:46,606 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 612 selfloop transitions, 59 changer transitions 28/712 dead transitions. [2023-08-26 16:57:46,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 712 transitions, 15096 flow [2023-08-26 16:57:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:57:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:57:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 601 transitions. [2023-08-26 16:57:46,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467704280155642 [2023-08-26 16:57:46,607 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 601 transitions. [2023-08-26 16:57:46,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 601 transitions. [2023-08-26 16:57:46,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:57:46,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 601 transitions. [2023-08-26 16:57:46,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:46,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:46,831 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:46,831 INFO L175 Difference]: Start difference. First operand has 156 places, 532 transitions, 10647 flow. Second operand 5 states and 601 transitions. [2023-08-26 16:57:46,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 712 transitions, 15096 flow [2023-08-26 16:57:51,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 712 transitions, 14109 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-26 16:57:51,495 INFO L231 Difference]: Finished difference. Result has 159 places, 544 transitions, 10420 flow [2023-08-26 16:57:51,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=9851, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10420, PETRI_PLACES=159, PETRI_TRANSITIONS=544} [2023-08-26 16:57:51,496 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2023-08-26 16:57:51,496 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 544 transitions, 10420 flow [2023-08-26 16:57:51,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:51,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:57:51,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:57:51,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-26 16:57:51,496 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:57:51,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:57:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash -131146238, now seen corresponding path program 7 times [2023-08-26 16:57:51,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:57:51,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897173501] [2023-08-26 16:57:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:57:51,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:57:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:57:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:57:51,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:57:51,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897173501] [2023-08-26 16:57:51,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897173501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:57:51,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:57:51,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:57:51,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636254487] [2023-08-26 16:57:51,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:57:51,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:57:51,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:57:51,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:57:51,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:57:51,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:57:51,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 544 transitions, 10420 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:51,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:57:51,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:57:51,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:57:57,607 INFO L124 PetriNetUnfolderBase]: 28020/37098 cut-off events. [2023-08-26 16:57:57,607 INFO L125 PetriNetUnfolderBase]: For 826685/831091 co-relation queries the response was YES. [2023-08-26 16:57:58,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275570 conditions, 37098 events. 28020/37098 cut-off events. For 826685/831091 co-relation queries the response was YES. Maximal size of possible extension queue 1826. Compared 205103 event pairs, 6776 based on Foata normal form. 2881/39551 useless extension candidates. Maximal degree in co-relation 275508. Up to 28893 conditions per place. [2023-08-26 16:57:58,145 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 642 selfloop transitions, 76 changer transitions 18/805 dead transitions. [2023-08-26 16:57:58,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 805 transitions, 16109 flow [2023-08-26 16:57:58,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:57:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:57:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 590 transitions. [2023-08-26 16:57:58,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591439688715953 [2023-08-26 16:57:58,147 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 590 transitions. [2023-08-26 16:57:58,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 590 transitions. [2023-08-26 16:57:58,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:57:58,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 590 transitions. [2023-08-26 16:57:58,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:58,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:58,148 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:57:58,148 INFO L175 Difference]: Start difference. First operand has 159 places, 544 transitions, 10420 flow. Second operand 5 states and 590 transitions. [2023-08-26 16:57:58,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 805 transitions, 16109 flow [2023-08-26 16:58:03,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 805 transitions, 15797 flow, removed 59 selfloop flow, removed 2 redundant places. [2023-08-26 16:58:03,608 INFO L231 Difference]: Finished difference. Result has 163 places, 596 transitions, 11257 flow [2023-08-26 16:58:03,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=10226, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=11257, PETRI_PLACES=163, PETRI_TRANSITIONS=596} [2023-08-26 16:58:03,609 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2023-08-26 16:58:03,609 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 596 transitions, 11257 flow [2023-08-26 16:58:03,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:03,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:58:03,609 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] [2023-08-26 16:58:03,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-26 16:58:03,610 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:58:03,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:58:03,610 INFO L85 PathProgramCache]: Analyzing trace with hash -990778760, now seen corresponding path program 8 times [2023-08-26 16:58:03,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:58:03,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207064962] [2023-08-26 16:58:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:58:03,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:58:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:58:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:58:03,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:58:03,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207064962] [2023-08-26 16:58:03,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207064962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:58:03,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:58:03,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:58:03,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608898142] [2023-08-26 16:58:03,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:58:03,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:58:03,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:58:03,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:58:03,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:58:03,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:58:03,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 596 transitions, 11257 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:03,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:58:03,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:58:03,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:58:09,590 INFO L124 PetriNetUnfolderBase]: 26434/35231 cut-off events. [2023-08-26 16:58:09,590 INFO L125 PetriNetUnfolderBase]: For 761994/764938 co-relation queries the response was YES. [2023-08-26 16:58:09,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268071 conditions, 35231 events. 26434/35231 cut-off events. For 761994/764938 co-relation queries the response was YES. Maximal size of possible extension queue 1709. Compared 196840 event pairs, 5966 based on Foata normal form. 2550/37484 useless extension candidates. Maximal degree in co-relation 268007. Up to 23710 conditions per place. [2023-08-26 16:58:10,006 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 612 selfloop transitions, 187 changer transitions 20/838 dead transitions. [2023-08-26 16:58:10,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 838 transitions, 16768 flow [2023-08-26 16:58:10,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:58:10,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:58:10,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-08-26 16:58:10,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622568093385214 [2023-08-26 16:58:10,008 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-08-26 16:58:10,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-08-26 16:58:10,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:58:10,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-08-26 16:58:10,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:10,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:10,010 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:10,010 INFO L175 Difference]: Start difference. First operand has 163 places, 596 transitions, 11257 flow. Second operand 5 states and 594 transitions. [2023-08-26 16:58:10,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 838 transitions, 16768 flow [2023-08-26 16:58:15,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 838 transitions, 16724 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:58:15,198 INFO L231 Difference]: Finished difference. Result has 167 places, 638 transitions, 12734 flow [2023-08-26 16:58:15,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=11213, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12734, PETRI_PLACES=167, PETRI_TRANSITIONS=638} [2023-08-26 16:58:15,199 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 113 predicate places. [2023-08-26 16:58:15,199 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 638 transitions, 12734 flow [2023-08-26 16:58:15,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:15,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:58:15,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:58:15,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-26 16:58:15,200 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:58:15,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:58:15,200 INFO L85 PathProgramCache]: Analyzing trace with hash 78716705, now seen corresponding path program 7 times [2023-08-26 16:58:15,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:58:15,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864178659] [2023-08-26 16:58:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:58:15,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:58:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:58:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:58:15,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:58:15,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864178659] [2023-08-26 16:58:15,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864178659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:58:15,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:58:15,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:58:15,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371636037] [2023-08-26 16:58:15,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:58:15,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:58:15,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:58:15,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:58:15,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:58:15,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:58:15,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 638 transitions, 12734 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:15,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:58:15,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:58:15,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:58:21,249 INFO L124 PetriNetUnfolderBase]: 26515/35626 cut-off events. [2023-08-26 16:58:21,249 INFO L125 PetriNetUnfolderBase]: For 846863/850085 co-relation queries the response was YES. [2023-08-26 16:58:21,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274176 conditions, 35626 events. 26515/35626 cut-off events. For 846863/850085 co-relation queries the response was YES. Maximal size of possible extension queue 1844. Compared 204602 event pairs, 6068 based on Foata normal form. 3273/38291 useless extension candidates. Maximal degree in co-relation 274111. Up to 26551 conditions per place. [2023-08-26 16:58:22,056 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 583 selfloop transitions, 137 changer transitions 34/772 dead transitions. [2023-08-26 16:58:22,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 772 transitions, 16081 flow [2023-08-26 16:58:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:58:22,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:58:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-08-26 16:58:22,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622568093385214 [2023-08-26 16:58:22,058 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-08-26 16:58:22,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-08-26 16:58:22,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:58:22,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-08-26 16:58:22,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:22,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:22,060 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:22,060 INFO L175 Difference]: Start difference. First operand has 167 places, 638 transitions, 12734 flow. Second operand 5 states and 594 transitions. [2023-08-26 16:58:22,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 772 transitions, 16081 flow [2023-08-26 16:58:27,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 772 transitions, 15356 flow, removed 154 selfloop flow, removed 3 redundant places. [2023-08-26 16:58:27,808 INFO L231 Difference]: Finished difference. Result has 169 places, 645 transitions, 12788 flow [2023-08-26 16:58:27,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=12120, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12788, PETRI_PLACES=169, PETRI_TRANSITIONS=645} [2023-08-26 16:58:27,809 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 115 predicate places. [2023-08-26 16:58:27,809 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 645 transitions, 12788 flow [2023-08-26 16:58:27,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:27,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:58:27,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:58:27,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-26 16:58:27,809 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:58:27,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:58:27,810 INFO L85 PathProgramCache]: Analyzing trace with hash -328075203, now seen corresponding path program 8 times [2023-08-26 16:58:27,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:58:27,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099984041] [2023-08-26 16:58:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:58:27,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:58:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:58:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:58:27,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:58:27,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099984041] [2023-08-26 16:58:27,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099984041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:58:27,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:58:27,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:58:27,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977063355] [2023-08-26 16:58:27,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:58:27,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:58:27,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:58:27,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:58:27,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:58:27,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:58:27,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 645 transitions, 12788 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:27,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:58:27,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:58:27,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:58:34,257 INFO L124 PetriNetUnfolderBase]: 27807/37464 cut-off events. [2023-08-26 16:58:34,257 INFO L125 PetriNetUnfolderBase]: For 815694/818275 co-relation queries the response was YES. [2023-08-26 16:58:34,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283761 conditions, 37464 events. 27807/37464 cut-off events. For 815694/818275 co-relation queries the response was YES. Maximal size of possible extension queue 1836. Compared 215015 event pairs, 5086 based on Foata normal form. 2391/39586 useless extension candidates. Maximal degree in co-relation 283695. Up to 18410 conditions per place. [2023-08-26 16:58:34,876 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 288 selfloop transitions, 464 changer transitions 15/786 dead transitions. [2023-08-26 16:58:34,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 786 transitions, 16265 flow [2023-08-26 16:58:34,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:58:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:58:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 601 transitions. [2023-08-26 16:58:34,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467704280155642 [2023-08-26 16:58:34,878 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 601 transitions. [2023-08-26 16:58:34,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 601 transitions. [2023-08-26 16:58:34,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:58:34,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 601 transitions. [2023-08-26 16:58:34,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:34,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:34,880 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:34,880 INFO L175 Difference]: Start difference. First operand has 169 places, 645 transitions, 12788 flow. Second operand 5 states and 601 transitions. [2023-08-26 16:58:34,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 786 transitions, 16265 flow [2023-08-26 16:58:41,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 786 transitions, 15885 flow, removed 36 selfloop flow, removed 3 redundant places. [2023-08-26 16:58:41,759 INFO L231 Difference]: Finished difference. Result has 172 places, 648 transitions, 13803 flow [2023-08-26 16:58:41,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=12454, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=461, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=13803, PETRI_PLACES=172, PETRI_TRANSITIONS=648} [2023-08-26 16:58:41,760 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 118 predicate places. [2023-08-26 16:58:41,760 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 648 transitions, 13803 flow [2023-08-26 16:58:41,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:41,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:58:41,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:58:41,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-26 16:58:41,761 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:58:41,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:58:41,761 INFO L85 PathProgramCache]: Analyzing trace with hash -585725098, now seen corresponding path program 6 times [2023-08-26 16:58:41,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:58:41,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716723796] [2023-08-26 16:58:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:58:41,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:58:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:58:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:58:41,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:58:41,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716723796] [2023-08-26 16:58:41,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716723796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:58:41,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:58:41,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:58:41,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481915636] [2023-08-26 16:58:41,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:58:41,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:58:41,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:58:41,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:58:41,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:58:41,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:58:41,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 648 transitions, 13803 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:41,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:58:41,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:58:41,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:58:44,431 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([528] L62-4-->L62-4: Formula: (and (= (+ v_thread3Thread1of1ForFork1_~i~2_36 1) v_thread3Thread1of1ForFork1_~i~2_35) (< v_thread3Thread1of1ForFork1_~i~2_36 v_~N~0_55) (= (+ v_~counter2~0_59 1) v_~counter2~0_58)) InVars {~counter2~0=v_~counter2~0_59, thread3Thread1of1ForFork1_~i~2=v_thread3Thread1of1ForFork1_~i~2_36, ~N~0=v_~N~0_55} OutVars{~counter2~0=v_~counter2~0_58, thread3Thread1of1ForFork1_#t~post6=|v_thread3Thread1of1ForFork1_#t~post6_9|, thread3Thread1of1ForFork1_#t~post5=|v_thread3Thread1of1ForFork1_#t~post5_13|, thread3Thread1of1ForFork1_~i~2=v_thread3Thread1of1ForFork1_~i~2_35, ~N~0=v_~N~0_55} AuxVars[] AssignedVars[~counter2~0, thread3Thread1of1ForFork1_#t~post6, thread3Thread1of1ForFork1_#t~post5, thread3Thread1of1ForFork1_~i~2][321], [Black: 1149#(<= ~N~0 0), Black: 1150#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 381#(= thread1Thread1of1ForFork0_~i~0 0), Black: 382#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 161#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), 104#L92-1true, Black: 1158#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 186#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1), 153#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), Black: 1165#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1164#(<= ~N~0 0), 177#(and (or (and (not (= |ULTIMATE.start_main_~#t2~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_main_~#t3~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (<= 4 (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|))) (= (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|) 4)) (= |ULTIMATE.start_main_~#t1~0#1.offset| 0)), Black: 1172#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 757#(= thread1Thread1of1ForFork0_~i~0 0), Black: 794#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= thread3Thread1of1ForFork1_~i~2 0)), Black: 758#(and (= thread1Thread1of1ForFork0_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 759#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 916#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 798#(and (<= thread3Thread1of1ForFork1_~i~2 0) (<= 1 ~N~0)), Black: 1181#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 929#(<= ~N~0 0), Black: 930#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 1188#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 1194#(<= 1 ~N~0), Black: 390#(<= 1 ~N~0), 16#L72-4true, Black: 391#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 546#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|)), 148#true, Black: 549#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 938#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0)), 173#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), 966#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 1195#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= 1 ~N~0)), 937#(<= 1 ~N~0), Black: 558#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), 40#L51-4true, Black: 557#(= thread3Thread1of1ForFork1_~i~2 0), Black: 945#(<= ~N~0 0), Black: 946#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), Black: 567#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 169#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), 76#thread1EXITtrue, Black: 566#(<= ~N~0 0), Black: 190#(= ~counter2~0 ~counter1~0), Black: 960#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 42#L62-4true, Black: 959#(<= ~N~0 0), 1171#(= |thread4Thread1of1ForFork3_~i~3#1| 0), Black: 195#(= thread1Thread1of1ForFork0_~i~0 0), 157#(and (= 4 (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_main_~#t2~0#1.offset| 0)), Black: 196#(<= ~N~0 0), Black: 197#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= ~N~0 0)), 1199#true, 165#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), Black: 574#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 732#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 573#(= thread3Thread1of1ForFork1_~i~2 0), 205#(<= 1 ~N~0), Black: 1125#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0) (<= 0 thread3Thread1of1ForFork1_~i~2)), 555#true, Black: 967#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 741#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 1132#(= |thread4Thread1of1ForFork3_~i~3#1| 0), 740#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 742#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 361#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0)), Black: 206#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 364#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1133#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 750#(<= 1 ~N~0), Black: 751#(and (<= 1 ~N~0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 1142#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 373#(<= ~N~0 0), Black: 1141#(<= 1 ~N~0), Black: 374#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0))]) [2023-08-26 16:58:44,431 INFO L294 olderBase$Statistics]: this new event has 16 ancestors and is cut-off event [2023-08-26 16:58:44,431 INFO L297 olderBase$Statistics]: existing Event has 16 ancestors and is cut-off event [2023-08-26 16:58:44,431 INFO L297 olderBase$Statistics]: existing Event has 16 ancestors and is cut-off event [2023-08-26 16:58:44,431 INFO L297 olderBase$Statistics]: existing Event has 16 ancestors and is cut-off event [2023-08-26 16:58:44,431 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([507] L51-4-->thread2EXIT: Formula: (and (<= v_~N~0_37 |v_thread2Thread1of1ForFork2_~i~1#1_28|) (= |v_thread2Thread1of1ForFork2_#res#1.base_7| 0) (= |v_thread2Thread1of1ForFork2_#res#1.offset_7| 0)) InVars {thread2Thread1of1ForFork2_~i~1#1=|v_thread2Thread1of1ForFork2_~i~1#1_28|, ~N~0=v_~N~0_37} OutVars{thread2Thread1of1ForFork2_#res#1.offset=|v_thread2Thread1of1ForFork2_#res#1.offset_7|, ~N~0=v_~N~0_37, thread2Thread1of1ForFork2_#res#1.base=|v_thread2Thread1of1ForFork2_#res#1.base_7|} AuxVars[] AssignedVars[thread2Thread1of1ForFork2_#res#1.offset, thread2Thread1of1ForFork2_~i~1#1, thread2Thread1of1ForFork2_#res#1.base][72], [Black: 1149#(<= ~N~0 0), Black: 1150#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 381#(= thread1Thread1of1ForFork0_~i~0 0), Black: 382#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 161#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), 104#L92-1true, Black: 1158#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 373#(<= ~N~0 0), 186#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1), 153#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), Black: 1165#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 177#(and (or (and (not (= |ULTIMATE.start_main_~#t2~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_main_~#t3~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (<= 4 (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|))) (= (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|) 4)) (= |ULTIMATE.start_main_~#t1~0#1.offset| 0)), Black: 1172#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 757#(= thread1Thread1of1ForFork0_~i~0 0), Black: 794#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= thread3Thread1of1ForFork1_~i~2 0)), Black: 758#(and (= thread1Thread1of1ForFork0_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 759#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 916#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 798#(and (<= thread3Thread1of1ForFork1_~i~2 0) (<= 1 ~N~0)), Black: 1181#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), 9#thread2EXITtrue, Black: 929#(<= ~N~0 0), Black: 930#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 1188#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 390#(<= 1 ~N~0), 16#L72-4true, Black: 391#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 546#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|)), 148#true, Black: 549#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 938#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0)), 173#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), Black: 937#(<= 1 ~N~0), Black: 1194#(<= 1 ~N~0), Black: 1195#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= 1 ~N~0)), 945#(<= ~N~0 0), Black: 557#(= thread3Thread1of1ForFork1_~i~2 0), Black: 946#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), Black: 567#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 169#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), 76#thread1EXITtrue, Black: 566#(<= ~N~0 0), Black: 190#(= ~counter2~0 ~counter1~0), Black: 960#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 42#L62-4true, Black: 959#(<= ~N~0 0), 1171#(= |thread4Thread1of1ForFork3_~i~3#1| 0), 573#(= thread3Thread1of1ForFork1_~i~2 0), Black: 195#(= thread1Thread1of1ForFork0_~i~0 0), 157#(and (= 4 (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_main_~#t2~0#1.offset| 0)), Black: 196#(<= ~N~0 0), Black: 197#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= ~N~0 0)), 1199#true, 165#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), 1157#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 574#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 732#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), 205#(<= 1 ~N~0), 738#true, Black: 1125#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0) (<= 0 thread3Thread1of1ForFork1_~i~2)), Black: 967#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 741#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 1132#(= |thread4Thread1of1ForFork3_~i~3#1| 0), Black: 966#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 740#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 742#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 361#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0)), Black: 206#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 364#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1133#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 750#(<= 1 ~N~0), Black: 751#(and (<= 1 ~N~0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 372#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 1142#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1141#(<= 1 ~N~0), Black: 374#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), 1164#(<= ~N~0 0), 1193#(= thread3Thread1of1ForFork1_~i~2 0)]) [2023-08-26 16:58:44,431 INFO L294 olderBase$Statistics]: this new event has 16 ancestors and is cut-off event [2023-08-26 16:58:44,431 INFO L297 olderBase$Statistics]: existing Event has 16 ancestors and is cut-off event [2023-08-26 16:58:44,432 INFO L297 olderBase$Statistics]: existing Event has 16 ancestors and is cut-off event [2023-08-26 16:58:44,432 INFO L297 olderBase$Statistics]: existing Event has 16 ancestors and is cut-off event [2023-08-26 16:58:45,173 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([508] L62-4-->thread3EXIT: Formula: (and (= |v_thread3Thread1of1ForFork1_#res.offset_7| 0) (<= v_~N~0_39 v_thread3Thread1of1ForFork1_~i~2_32) (= |v_thread3Thread1of1ForFork1_#res.base_7| 0)) InVars {thread3Thread1of1ForFork1_~i~2=v_thread3Thread1of1ForFork1_~i~2_32, ~N~0=v_~N~0_39} OutVars{thread3Thread1of1ForFork1_#res.offset=|v_thread3Thread1of1ForFork1_#res.offset_7|, thread3Thread1of1ForFork1_#res.base=|v_thread3Thread1of1ForFork1_#res.base_7|, ~N~0=v_~N~0_39} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_#res.offset, thread3Thread1of1ForFork1_~i~2, thread3Thread1of1ForFork1_#res.base][199], [Black: 1149#(<= ~N~0 0), Black: 1150#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 381#(= thread1Thread1of1ForFork0_~i~0 0), Black: 382#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 161#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), 104#L92-1true, 186#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1), 153#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), Black: 1165#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1164#(<= ~N~0 0), 177#(and (or (and (not (= |ULTIMATE.start_main_~#t2~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_main_~#t3~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (<= 4 (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|))) (= (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|) 4)) (= |ULTIMATE.start_main_~#t1~0#1.offset| 0)), Black: 757#(= thread1Thread1of1ForFork0_~i~0 0), Black: 1172#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 794#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= thread3Thread1of1ForFork1_~i~2 0)), Black: 758#(and (= thread1Thread1of1ForFork0_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 759#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 916#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 798#(and (<= thread3Thread1of1ForFork1_~i~2 0) (<= 1 ~N~0)), 959#(<= ~N~0 0), 92#thread3EXITtrue, Black: 1181#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 930#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 1188#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 16#L72-4true, Black: 390#(<= 1 ~N~0), Black: 391#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 546#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|)), 148#true, Black: 549#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 938#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0)), 173#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), Black: 937#(<= 1 ~N~0), Black: 1194#(<= 1 ~N~0), 966#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 1195#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= 1 ~N~0)), 1158#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 40#L51-4true, Black: 558#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 557#(= thread3Thread1of1ForFork1_~i~2 0), Black: 945#(<= ~N~0 0), Black: 946#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), Black: 567#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 169#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), 76#thread1EXITtrue, Black: 566#(<= ~N~0 0), Black: 190#(= ~counter2~0 ~counter1~0), Black: 960#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 1171#(= |thread4Thread1of1ForFork3_~i~3#1| 0), Black: 195#(= thread1Thread1of1ForFork0_~i~0 0), 157#(and (= 4 (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_main_~#t2~0#1.offset| 0)), Black: 196#(<= ~N~0 0), Black: 197#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= ~N~0 0)), 1199#true, 165#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), Black: 574#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 732#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 573#(= thread3Thread1of1ForFork1_~i~2 0), 205#(<= 1 ~N~0), 929#(<= ~N~0 0), Black: 1125#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0) (<= 0 thread3Thread1of1ForFork1_~i~2)), Black: 967#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 741#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 1132#(= |thread4Thread1of1ForFork3_~i~3#1| 0), 555#true, 740#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 742#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 361#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0)), Black: 206#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1133#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 750#(<= 1 ~N~0), Black: 364#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 751#(and (<= 1 ~N~0) (= thread1Thread1of1ForFork0_~i~0 0)), 1191#true, Black: 1142#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 373#(<= ~N~0 0), Black: 1141#(<= 1 ~N~0), Black: 374#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0))]) [2023-08-26 16:58:45,174 INFO L294 olderBase$Statistics]: this new event has 16 ancestors and is not cut-off event [2023-08-26 16:58:45,174 INFO L297 olderBase$Statistics]: existing Event has 16 ancestors and is not cut-off event [2023-08-26 16:58:45,174 INFO L297 olderBase$Statistics]: existing Event has 16 ancestors and is not cut-off event [2023-08-26 16:58:45,174 INFO L297 olderBase$Statistics]: existing Event has 16 ancestors and is not cut-off event [2023-08-26 16:58:45,696 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([508] L62-4-->thread3EXIT: Formula: (and (= |v_thread3Thread1of1ForFork1_#res.offset_7| 0) (<= v_~N~0_39 v_thread3Thread1of1ForFork1_~i~2_32) (= |v_thread3Thread1of1ForFork1_#res.base_7| 0)) InVars {thread3Thread1of1ForFork1_~i~2=v_thread3Thread1of1ForFork1_~i~2_32, ~N~0=v_~N~0_39} OutVars{thread3Thread1of1ForFork1_#res.offset=|v_thread3Thread1of1ForFork1_#res.offset_7|, thread3Thread1of1ForFork1_#res.base=|v_thread3Thread1of1ForFork1_#res.base_7|, ~N~0=v_~N~0_39} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_#res.offset, thread3Thread1of1ForFork1_~i~2, thread3Thread1of1ForFork1_#res.base][199], [Black: 1149#(<= ~N~0 0), Black: 1150#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 381#(= thread1Thread1of1ForFork0_~i~0 0), Black: 382#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 161#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), 186#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1), 153#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), Black: 1165#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1164#(<= ~N~0 0), 177#(and (or (and (not (= |ULTIMATE.start_main_~#t2~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_main_~#t3~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (<= 4 (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|))) (= (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|) 4)) (= |ULTIMATE.start_main_~#t1~0#1.offset| 0)), Black: 1172#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 757#(= thread1Thread1of1ForFork0_~i~0 0), Black: 794#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= thread3Thread1of1ForFork1_~i~2 0)), Black: 758#(and (= thread1Thread1of1ForFork0_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 759#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 916#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 798#(and (<= thread3Thread1of1ForFork1_~i~2 0) (<= 1 ~N~0)), 959#(<= ~N~0 0), 92#thread3EXITtrue, Black: 1181#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 930#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 1188#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 390#(<= 1 ~N~0), 16#L72-4true, Black: 391#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 546#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|)), 148#true, Black: 549#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 938#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0)), 173#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), Black: 937#(<= 1 ~N~0), Black: 1194#(<= 1 ~N~0), 966#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 1195#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= 1 ~N~0)), 1158#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), Black: 558#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), 40#L51-4true, Black: 557#(= thread3Thread1of1ForFork1_~i~2 0), Black: 945#(<= ~N~0 0), Black: 946#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), Black: 567#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 169#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), Black: 566#(<= ~N~0 0), Black: 190#(= ~counter2~0 ~counter1~0), Black: 960#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 1171#(= |thread4Thread1of1ForFork3_~i~3#1| 0), Black: 195#(= thread1Thread1of1ForFork0_~i~0 0), 157#(and (= 4 (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_main_~#t2~0#1.offset| 0)), Black: 196#(<= ~N~0 0), Black: 197#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= ~N~0 0)), 1199#true, 165#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), Black: 574#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 732#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 573#(= thread3Thread1of1ForFork1_~i~2 0), 205#(<= 1 ~N~0), 59#L92-2true, 929#(<= ~N~0 0), Black: 1125#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0) (<= 0 thread3Thread1of1ForFork1_~i~2)), Black: 967#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 741#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 1132#(= |thread4Thread1of1ForFork3_~i~3#1| 0), 555#true, 740#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 742#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 361#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0)), Black: 206#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 364#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1133#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 750#(<= 1 ~N~0), 1191#true, Black: 751#(and (<= 1 ~N~0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 1142#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 373#(<= ~N~0 0), Black: 1141#(<= 1 ~N~0), Black: 374#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0))]) [2023-08-26 16:58:45,696 INFO L294 olderBase$Statistics]: this new event has 17 ancestors and is cut-off event [2023-08-26 16:58:45,696 INFO L297 olderBase$Statistics]: existing Event has 17 ancestors and is cut-off event [2023-08-26 16:58:45,696 INFO L297 olderBase$Statistics]: existing Event has 17 ancestors and is cut-off event [2023-08-26 16:58:45,696 INFO L297 olderBase$Statistics]: existing Event has 17 ancestors and is cut-off event [2023-08-26 16:58:45,696 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([528] L62-4-->L62-4: Formula: (and (= (+ v_thread3Thread1of1ForFork1_~i~2_36 1) v_thread3Thread1of1ForFork1_~i~2_35) (< v_thread3Thread1of1ForFork1_~i~2_36 v_~N~0_55) (= (+ v_~counter2~0_59 1) v_~counter2~0_58)) InVars {~counter2~0=v_~counter2~0_59, thread3Thread1of1ForFork1_~i~2=v_thread3Thread1of1ForFork1_~i~2_36, ~N~0=v_~N~0_55} OutVars{~counter2~0=v_~counter2~0_58, thread3Thread1of1ForFork1_#t~post6=|v_thread3Thread1of1ForFork1_#t~post6_9|, thread3Thread1of1ForFork1_#t~post5=|v_thread3Thread1of1ForFork1_#t~post5_13|, thread3Thread1of1ForFork1_~i~2=v_thread3Thread1of1ForFork1_~i~2_35, ~N~0=v_~N~0_55} AuxVars[] AssignedVars[~counter2~0, thread3Thread1of1ForFork1_#t~post6, thread3Thread1of1ForFork1_#t~post5, thread3Thread1of1ForFork1_~i~2][321], [Black: 1149#(<= ~N~0 0), Black: 1150#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 381#(= thread1Thread1of1ForFork0_~i~0 0), Black: 382#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 161#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), Black: 1158#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 186#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1), 153#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), Black: 1165#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1164#(<= ~N~0 0), 177#(and (or (and (not (= |ULTIMATE.start_main_~#t2~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_main_~#t3~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (<= 4 (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|))) (= (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|) 4)) (= |ULTIMATE.start_main_~#t1~0#1.offset| 0)), Black: 1172#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 757#(= thread1Thread1of1ForFork0_~i~0 0), Black: 794#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= thread3Thread1of1ForFork1_~i~2 0)), Black: 758#(and (= thread1Thread1of1ForFork0_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 759#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 916#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 798#(and (<= thread3Thread1of1ForFork1_~i~2 0) (<= 1 ~N~0)), Black: 1181#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 929#(<= ~N~0 0), Black: 930#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 1188#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 1194#(<= 1 ~N~0), Black: 390#(<= 1 ~N~0), 16#L72-4true, Black: 391#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 546#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|)), 148#true, Black: 549#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 938#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0)), 173#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), 966#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 1195#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= 1 ~N~0)), 937#(<= 1 ~N~0), Black: 558#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), 40#L51-4true, Black: 557#(= thread3Thread1of1ForFork1_~i~2 0), Black: 945#(<= ~N~0 0), Black: 946#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), Black: 567#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 169#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), Black: 566#(<= ~N~0 0), Black: 190#(= ~counter2~0 ~counter1~0), Black: 960#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 42#L62-4true, Black: 959#(<= ~N~0 0), 1171#(= |thread4Thread1of1ForFork3_~i~3#1| 0), Black: 195#(= thread1Thread1of1ForFork0_~i~0 0), 157#(and (= 4 (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_main_~#t2~0#1.offset| 0)), Black: 196#(<= ~N~0 0), Black: 197#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= ~N~0 0)), 1199#true, 165#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), Black: 574#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 732#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 573#(= thread3Thread1of1ForFork1_~i~2 0), 205#(<= 1 ~N~0), 59#L92-2true, Black: 1125#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0) (<= 0 thread3Thread1of1ForFork1_~i~2)), 555#true, Black: 967#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 741#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 1132#(= |thread4Thread1of1ForFork3_~i~3#1| 0), 740#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 742#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 361#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0)), Black: 206#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 364#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1133#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 750#(<= 1 ~N~0), Black: 751#(and (<= 1 ~N~0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 1142#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 373#(<= ~N~0 0), Black: 1141#(<= 1 ~N~0), Black: 374#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0))]) [2023-08-26 16:58:45,696 INFO L294 olderBase$Statistics]: this new event has 17 ancestors and is cut-off event [2023-08-26 16:58:45,697 INFO L297 olderBase$Statistics]: existing Event has 17 ancestors and is cut-off event [2023-08-26 16:58:45,697 INFO L297 olderBase$Statistics]: existing Event has 17 ancestors and is cut-off event [2023-08-26 16:58:45,697 INFO L297 olderBase$Statistics]: existing Event has 17 ancestors and is cut-off event [2023-08-26 16:58:45,697 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([507] L51-4-->thread2EXIT: Formula: (and (<= v_~N~0_37 |v_thread2Thread1of1ForFork2_~i~1#1_28|) (= |v_thread2Thread1of1ForFork2_#res#1.base_7| 0) (= |v_thread2Thread1of1ForFork2_#res#1.offset_7| 0)) InVars {thread2Thread1of1ForFork2_~i~1#1=|v_thread2Thread1of1ForFork2_~i~1#1_28|, ~N~0=v_~N~0_37} OutVars{thread2Thread1of1ForFork2_#res#1.offset=|v_thread2Thread1of1ForFork2_#res#1.offset_7|, ~N~0=v_~N~0_37, thread2Thread1of1ForFork2_#res#1.base=|v_thread2Thread1of1ForFork2_#res#1.base_7|} AuxVars[] AssignedVars[thread2Thread1of1ForFork2_#res#1.offset, thread2Thread1of1ForFork2_~i~1#1, thread2Thread1of1ForFork2_#res#1.base][72], [Black: 1149#(<= ~N~0 0), Black: 1150#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 381#(= thread1Thread1of1ForFork0_~i~0 0), Black: 382#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 161#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), Black: 1158#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 373#(<= ~N~0 0), 186#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1), 153#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), Black: 1165#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 177#(and (or (and (not (= |ULTIMATE.start_main_~#t2~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_main_~#t3~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (<= 4 (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|))) (= (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|) 4)) (= |ULTIMATE.start_main_~#t1~0#1.offset| 0)), Black: 1172#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 757#(= thread1Thread1of1ForFork0_~i~0 0), Black: 794#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= thread3Thread1of1ForFork1_~i~2 0)), Black: 758#(and (= thread1Thread1of1ForFork0_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 759#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 916#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 798#(and (<= thread3Thread1of1ForFork1_~i~2 0) (<= 1 ~N~0)), Black: 1181#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), 9#thread2EXITtrue, Black: 929#(<= ~N~0 0), Black: 930#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 1188#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 390#(<= 1 ~N~0), 16#L72-4true, Black: 391#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 546#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|)), 148#true, Black: 549#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 938#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0)), 173#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), Black: 937#(<= 1 ~N~0), Black: 1194#(<= 1 ~N~0), Black: 1195#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= 1 ~N~0)), 945#(<= ~N~0 0), Black: 557#(= thread3Thread1of1ForFork1_~i~2 0), Black: 946#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), Black: 567#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 169#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), Black: 566#(<= ~N~0 0), Black: 190#(= ~counter2~0 ~counter1~0), Black: 960#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 42#L62-4true, Black: 959#(<= ~N~0 0), 1171#(= |thread4Thread1of1ForFork3_~i~3#1| 0), 573#(= thread3Thread1of1ForFork1_~i~2 0), Black: 195#(= thread1Thread1of1ForFork0_~i~0 0), 157#(and (= 4 (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_main_~#t2~0#1.offset| 0)), Black: 196#(<= ~N~0 0), Black: 197#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= ~N~0 0)), 1199#true, 165#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), 1157#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 574#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 732#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), 205#(<= 1 ~N~0), 738#true, 59#L92-2true, Black: 1125#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0) (<= 0 thread3Thread1of1ForFork1_~i~2)), Black: 967#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 741#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 1132#(= |thread4Thread1of1ForFork3_~i~3#1| 0), Black: 966#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 740#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 742#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 361#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0)), Black: 206#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 364#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1133#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 750#(<= 1 ~N~0), Black: 751#(and (<= 1 ~N~0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 372#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 1142#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1141#(<= 1 ~N~0), Black: 374#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), 1164#(<= ~N~0 0), 1193#(= thread3Thread1of1ForFork1_~i~2 0)]) [2023-08-26 16:58:45,697 INFO L294 olderBase$Statistics]: this new event has 17 ancestors and is cut-off event [2023-08-26 16:58:45,697 INFO L297 olderBase$Statistics]: existing Event has 17 ancestors and is cut-off event [2023-08-26 16:58:45,697 INFO L297 olderBase$Statistics]: existing Event has 17 ancestors and is cut-off event [2023-08-26 16:58:45,697 INFO L297 olderBase$Statistics]: existing Event has 17 ancestors and is cut-off event [2023-08-26 16:58:46,781 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([508] L62-4-->thread3EXIT: Formula: (and (= |v_thread3Thread1of1ForFork1_#res.offset_7| 0) (<= v_~N~0_39 v_thread3Thread1of1ForFork1_~i~2_32) (= |v_thread3Thread1of1ForFork1_#res.base_7| 0)) InVars {thread3Thread1of1ForFork1_~i~2=v_thread3Thread1of1ForFork1_~i~2_32, ~N~0=v_~N~0_39} OutVars{thread3Thread1of1ForFork1_#res.offset=|v_thread3Thread1of1ForFork1_#res.offset_7|, thread3Thread1of1ForFork1_#res.base=|v_thread3Thread1of1ForFork1_#res.base_7|, ~N~0=v_~N~0_39} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_#res.offset, thread3Thread1of1ForFork1_~i~2, thread3Thread1of1ForFork1_#res.base][199], [Black: 1149#(<= ~N~0 0), Black: 1150#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 381#(= thread1Thread1of1ForFork0_~i~0 0), Black: 382#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 161#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), 186#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1), 153#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), Black: 1165#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1164#(<= ~N~0 0), 177#(and (or (and (not (= |ULTIMATE.start_main_~#t2~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_main_~#t3~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (<= 4 (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|))) (= (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|) 4)) (= |ULTIMATE.start_main_~#t1~0#1.offset| 0)), Black: 1172#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 757#(= thread1Thread1of1ForFork0_~i~0 0), Black: 794#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= thread3Thread1of1ForFork1_~i~2 0)), Black: 758#(and (= thread1Thread1of1ForFork0_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 759#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 916#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 798#(and (<= thread3Thread1of1ForFork1_~i~2 0) (<= 1 ~N~0)), 92#thread3EXITtrue, 959#(<= ~N~0 0), Black: 1181#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 930#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 1188#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 390#(<= 1 ~N~0), 16#L72-4true, Black: 391#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 546#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|)), 148#true, Black: 549#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 938#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0)), 173#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), Black: 937#(<= 1 ~N~0), Black: 1194#(<= 1 ~N~0), 966#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 1195#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= 1 ~N~0)), 1158#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 40#L51-4true, Black: 558#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 557#(= thread3Thread1of1ForFork1_~i~2 0), Black: 945#(<= ~N~0 0), Black: 946#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), Black: 567#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 169#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), Black: 566#(<= ~N~0 0), Black: 190#(= ~counter2~0 ~counter1~0), 111#L93-1true, Black: 960#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 1171#(= |thread4Thread1of1ForFork3_~i~3#1| 0), Black: 195#(= thread1Thread1of1ForFork0_~i~0 0), 157#(and (= 4 (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_main_~#t2~0#1.offset| 0)), Black: 196#(<= ~N~0 0), Black: 197#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= ~N~0 0)), 1199#true, 165#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), Black: 574#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 732#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 573#(= thread3Thread1of1ForFork1_~i~2 0), 205#(<= 1 ~N~0), 929#(<= ~N~0 0), Black: 1125#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0) (<= 0 thread3Thread1of1ForFork1_~i~2)), Black: 967#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 741#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 1132#(= |thread4Thread1of1ForFork3_~i~3#1| 0), 555#true, 740#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 742#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 361#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0)), Black: 206#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1133#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 750#(<= 1 ~N~0), Black: 364#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 751#(and (<= 1 ~N~0) (= thread1Thread1of1ForFork0_~i~0 0)), 1191#true, Black: 1142#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 373#(<= ~N~0 0), Black: 1141#(<= 1 ~N~0), Black: 374#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0))]) [2023-08-26 16:58:46,781 INFO L294 olderBase$Statistics]: this new event has 18 ancestors and is cut-off event [2023-08-26 16:58:46,781 INFO L297 olderBase$Statistics]: existing Event has 18 ancestors and is cut-off event [2023-08-26 16:58:46,781 INFO L297 olderBase$Statistics]: existing Event has 18 ancestors and is cut-off event [2023-08-26 16:58:46,781 INFO L297 olderBase$Statistics]: existing Event has 18 ancestors and is cut-off event [2023-08-26 16:58:46,782 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([528] L62-4-->L62-4: Formula: (and (= (+ v_thread3Thread1of1ForFork1_~i~2_36 1) v_thread3Thread1of1ForFork1_~i~2_35) (< v_thread3Thread1of1ForFork1_~i~2_36 v_~N~0_55) (= (+ v_~counter2~0_59 1) v_~counter2~0_58)) InVars {~counter2~0=v_~counter2~0_59, thread3Thread1of1ForFork1_~i~2=v_thread3Thread1of1ForFork1_~i~2_36, ~N~0=v_~N~0_55} OutVars{~counter2~0=v_~counter2~0_58, thread3Thread1of1ForFork1_#t~post6=|v_thread3Thread1of1ForFork1_#t~post6_9|, thread3Thread1of1ForFork1_#t~post5=|v_thread3Thread1of1ForFork1_#t~post5_13|, thread3Thread1of1ForFork1_~i~2=v_thread3Thread1of1ForFork1_~i~2_35, ~N~0=v_~N~0_55} AuxVars[] AssignedVars[~counter2~0, thread3Thread1of1ForFork1_#t~post6, thread3Thread1of1ForFork1_#t~post5, thread3Thread1of1ForFork1_~i~2][321], [Black: 1149#(<= ~N~0 0), Black: 1150#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 381#(= thread1Thread1of1ForFork0_~i~0 0), Black: 382#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 161#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), Black: 1158#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 186#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1), 153#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), Black: 1165#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1164#(<= ~N~0 0), 177#(and (or (and (not (= |ULTIMATE.start_main_~#t2~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_main_~#t3~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (<= 4 (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|))) (= (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|) 4)) (= |ULTIMATE.start_main_~#t1~0#1.offset| 0)), Black: 1172#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 757#(= thread1Thread1of1ForFork0_~i~0 0), Black: 794#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= thread3Thread1of1ForFork1_~i~2 0)), Black: 758#(and (= thread1Thread1of1ForFork0_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 759#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 916#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 798#(and (<= thread3Thread1of1ForFork1_~i~2 0) (<= 1 ~N~0)), Black: 1181#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 929#(<= ~N~0 0), Black: 930#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 1188#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 390#(<= 1 ~N~0), 16#L72-4true, 1194#(<= 1 ~N~0), Black: 391#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 546#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|)), 148#true, Black: 549#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 938#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0)), 173#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), 966#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 1195#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= 1 ~N~0)), 937#(<= 1 ~N~0), 40#L51-4true, Black: 558#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 557#(= thread3Thread1of1ForFork1_~i~2 0), Black: 945#(<= ~N~0 0), Black: 946#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), Black: 567#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 169#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), Black: 566#(<= ~N~0 0), Black: 190#(= ~counter2~0 ~counter1~0), 111#L93-1true, Black: 960#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 42#L62-4true, Black: 959#(<= ~N~0 0), 1171#(= |thread4Thread1of1ForFork3_~i~3#1| 0), Black: 195#(= thread1Thread1of1ForFork0_~i~0 0), 157#(and (= 4 (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_main_~#t2~0#1.offset| 0)), Black: 196#(<= ~N~0 0), Black: 197#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= ~N~0 0)), 1199#true, 165#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), Black: 574#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 732#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 573#(= thread3Thread1of1ForFork1_~i~2 0), 205#(<= 1 ~N~0), Black: 1125#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0) (<= 0 thread3Thread1of1ForFork1_~i~2)), Black: 967#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 741#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 1132#(= |thread4Thread1of1ForFork3_~i~3#1| 0), 555#true, 740#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 742#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 361#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0)), Black: 206#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1133#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 750#(<= 1 ~N~0), Black: 364#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 751#(and (<= 1 ~N~0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 1142#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 373#(<= ~N~0 0), Black: 1141#(<= 1 ~N~0), Black: 374#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0))]) [2023-08-26 16:58:46,782 INFO L294 olderBase$Statistics]: this new event has 18 ancestors and is cut-off event [2023-08-26 16:58:46,782 INFO L297 olderBase$Statistics]: existing Event has 18 ancestors and is cut-off event [2023-08-26 16:58:46,782 INFO L297 olderBase$Statistics]: existing Event has 18 ancestors and is cut-off event [2023-08-26 16:58:46,782 INFO L297 olderBase$Statistics]: existing Event has 18 ancestors and is cut-off event [2023-08-26 16:58:46,782 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([507] L51-4-->thread2EXIT: Formula: (and (<= v_~N~0_37 |v_thread2Thread1of1ForFork2_~i~1#1_28|) (= |v_thread2Thread1of1ForFork2_#res#1.base_7| 0) (= |v_thread2Thread1of1ForFork2_#res#1.offset_7| 0)) InVars {thread2Thread1of1ForFork2_~i~1#1=|v_thread2Thread1of1ForFork2_~i~1#1_28|, ~N~0=v_~N~0_37} OutVars{thread2Thread1of1ForFork2_#res#1.offset=|v_thread2Thread1of1ForFork2_#res#1.offset_7|, ~N~0=v_~N~0_37, thread2Thread1of1ForFork2_#res#1.base=|v_thread2Thread1of1ForFork2_#res#1.base_7|} AuxVars[] AssignedVars[thread2Thread1of1ForFork2_#res#1.offset, thread2Thread1of1ForFork2_~i~1#1, thread2Thread1of1ForFork2_#res#1.base][72], [Black: 1149#(<= ~N~0 0), Black: 1150#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 381#(= thread1Thread1of1ForFork0_~i~0 0), Black: 382#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 161#(and (<= 0 |ULTIMATE.start_main_~#t3~0#1.offset|) (<= (+ |ULTIMATE.start_main_~#t3~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#t3~0#1.base|))), Black: 1158#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 373#(<= ~N~0 0), 186#(= (select |#valid| |ULTIMATE.start_main_~#t1~0#1.base|) 1), 153#(= (select |#valid| |ULTIMATE.start_main_~#t2~0#1.base|) 1), Black: 1165#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 177#(and (or (and (not (= |ULTIMATE.start_main_~#t2~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (not (= |ULTIMATE.start_main_~#t3~0#1.base| |ULTIMATE.start_main_~#t1~0#1.base|)) (<= 4 (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|))) (= (select |#length| |ULTIMATE.start_main_~#t1~0#1.base|) 4)) (= |ULTIMATE.start_main_~#t1~0#1.offset| 0)), Black: 1172#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 757#(= thread1Thread1of1ForFork0_~i~0 0), Black: 794#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= thread3Thread1of1ForFork1_~i~2 0)), Black: 758#(and (= thread1Thread1of1ForFork0_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 759#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 916#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 798#(and (<= thread3Thread1of1ForFork1_~i~2 0) (<= 1 ~N~0)), Black: 1181#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), 9#thread2EXITtrue, Black: 929#(<= ~N~0 0), Black: 930#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 1188#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 390#(<= 1 ~N~0), 16#L72-4true, Black: 391#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 546#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|)), 148#true, Black: 549#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 938#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0)), 173#(= (select |#valid| |ULTIMATE.start_main_~#t4~0#1.base|) 1), Black: 937#(<= 1 ~N~0), Black: 1194#(<= 1 ~N~0), Black: 1195#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= 1 ~N~0)), 945#(<= ~N~0 0), Black: 557#(= thread3Thread1of1ForFork1_~i~2 0), Black: 946#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), Black: 567#(and (<= ~N~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 169#(and (<= 4 (select |#length| |ULTIMATE.start_main_~#t4~0#1.base|)) (= |ULTIMATE.start_main_~#t4~0#1.offset| 0)), Black: 566#(<= ~N~0 0), Black: 190#(= ~counter2~0 ~counter1~0), 111#L93-1true, Black: 960#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (<= ~N~0 0)), 42#L62-4true, Black: 959#(<= ~N~0 0), 1171#(= |thread4Thread1of1ForFork3_~i~3#1| 0), 573#(= thread3Thread1of1ForFork1_~i~2 0), Black: 195#(= thread1Thread1of1ForFork0_~i~0 0), 157#(and (= 4 (select |#length| |ULTIMATE.start_main_~#t2~0#1.base|)) (= |ULTIMATE.start_main_~#t2~0#1.offset| 0)), Black: 196#(<= ~N~0 0), Black: 197#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= ~N~0 0)), 1199#true, 165#(= (select |#valid| |ULTIMATE.start_main_~#t3~0#1.base|) 1), 1157#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 574#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 732#(and (<= 1 ~N~0) (<= 0 |thread2Thread1of1ForFork2_~i~1#1|) (= thread3Thread1of1ForFork1_~i~2 0)), 205#(<= 1 ~N~0), 738#true, Black: 1125#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (<= 1 ~N~0) (<= 0 thread3Thread1of1ForFork1_~i~2)), Black: 967#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 741#(and (= |thread2Thread1of1ForFork2_~i~1#1| 0) (= thread1Thread1of1ForFork0_~i~0 0)), 1132#(= |thread4Thread1of1ForFork3_~i~3#1| 0), Black: 740#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 966#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 742#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), Black: 361#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0)), Black: 206#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 364#(and (<= 0 thread1Thread1of1ForFork0_~i~0) (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1133#(and (= |thread4Thread1of1ForFork3_~i~3#1| 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 750#(<= 1 ~N~0), Black: 751#(and (<= 1 ~N~0) (= thread1Thread1of1ForFork0_~i~0 0)), Black: 372#(= |thread2Thread1of1ForFork2_~i~1#1| 0), Black: 1142#(and (<= 1 ~N~0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 1141#(<= 1 ~N~0), Black: 374#(and (= thread1Thread1of1ForFork0_~i~0 0) (<= ~N~0 0)), 1164#(<= ~N~0 0), 1193#(= thread3Thread1of1ForFork1_~i~2 0)]) [2023-08-26 16:58:46,782 INFO L294 olderBase$Statistics]: this new event has 18 ancestors and is cut-off event [2023-08-26 16:58:46,782 INFO L297 olderBase$Statistics]: existing Event has 18 ancestors and is cut-off event [2023-08-26 16:58:46,782 INFO L297 olderBase$Statistics]: existing Event has 18 ancestors and is cut-off event [2023-08-26 16:58:46,782 INFO L297 olderBase$Statistics]: existing Event has 18 ancestors and is cut-off event [2023-08-26 16:58:48,613 INFO L124 PetriNetUnfolderBase]: 27262/36623 cut-off events. [2023-08-26 16:58:48,613 INFO L125 PetriNetUnfolderBase]: For 942032/946016 co-relation queries the response was YES. [2023-08-26 16:58:49,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284522 conditions, 36623 events. 27262/36623 cut-off events. For 942032/946016 co-relation queries the response was YES. Maximal size of possible extension queue 1943. Compared 210858 event pairs, 7422 based on Foata normal form. 3516/39663 useless extension candidates. Maximal degree in co-relation 284454. Up to 28979 conditions per place. [2023-08-26 16:58:49,164 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 602 selfloop transitions, 144 changer transitions 34/793 dead transitions. [2023-08-26 16:58:49,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 793 transitions, 18191 flow [2023-08-26 16:58:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:58:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:58:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 587 transitions. [2023-08-26 16:58:49,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45680933852140077 [2023-08-26 16:58:49,165 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 587 transitions. [2023-08-26 16:58:49,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 587 transitions. [2023-08-26 16:58:49,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:58:49,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 587 transitions. [2023-08-26 16:58:49,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.4) internal successors, (587), 5 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:49,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:49,167 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:49,167 INFO L175 Difference]: Start difference. First operand has 172 places, 648 transitions, 13803 flow. Second operand 5 states and 587 transitions. [2023-08-26 16:58:49,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 793 transitions, 18191 flow [2023-08-26 16:58:56,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 793 transitions, 17496 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-26 16:58:56,335 INFO L231 Difference]: Finished difference. Result has 174 places, 637 transitions, 13262 flow [2023-08-26 16:58:56,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=13203, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=13262, PETRI_PLACES=174, PETRI_TRANSITIONS=637} [2023-08-26 16:58:56,336 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 120 predicate places. [2023-08-26 16:58:56,336 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 637 transitions, 13262 flow [2023-08-26 16:58:56,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:56,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:58:56,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:58:56,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-26 16:58:56,336 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:58:56,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:58:56,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1899506859, now seen corresponding path program 9 times [2023-08-26 16:58:56,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:58:56,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598299273] [2023-08-26 16:58:56,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:58:56,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:58:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:58:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:58:56,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:58:56,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598299273] [2023-08-26 16:58:56,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598299273] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:58:56,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:58:56,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:58:56,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11921875] [2023-08-26 16:58:56,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:58:56,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:58:56,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:58:56,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:58:56,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:58:56,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:58:56,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 637 transitions, 13262 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:58:56,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:58:56,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:58:56,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:02,889 INFO L124 PetriNetUnfolderBase]: 26333/35453 cut-off events. [2023-08-26 16:59:02,889 INFO L125 PetriNetUnfolderBase]: For 836106/839533 co-relation queries the response was YES. [2023-08-26 16:59:03,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271594 conditions, 35453 events. 26333/35453 cut-off events. For 836106/839533 co-relation queries the response was YES. Maximal size of possible extension queue 1785. Compared 202497 event pairs, 5945 based on Foata normal form. 2991/37996 useless extension candidates. Maximal degree in co-relation 271526. Up to 16202 conditions per place. [2023-08-26 16:59:03,448 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 254 selfloop transitions, 464 changer transitions 2/738 dead transitions. [2023-08-26 16:59:03,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 738 transitions, 16014 flow [2023-08-26 16:59:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:59:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:59:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-08-26 16:59:03,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622568093385214 [2023-08-26 16:59:03,449 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-08-26 16:59:03,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-08-26 16:59:03,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:03,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-08-26 16:59:03,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:03,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:03,451 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:03,451 INFO L175 Difference]: Start difference. First operand has 174 places, 637 transitions, 13262 flow. Second operand 5 states and 594 transitions. [2023-08-26 16:59:03,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 738 transitions, 16014 flow [2023-08-26 16:59:10,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 738 transitions, 15581 flow, removed 80 selfloop flow, removed 3 redundant places. [2023-08-26 16:59:10,604 INFO L231 Difference]: Finished difference. Result has 175 places, 638 transitions, 13928 flow [2023-08-26 16:59:10,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=12920, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=461, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=13928, PETRI_PLACES=175, PETRI_TRANSITIONS=638} [2023-08-26 16:59:10,605 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 121 predicate places. [2023-08-26 16:59:10,605 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 638 transitions, 13928 flow [2023-08-26 16:59:10,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:10,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:10,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:10,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-26 16:59:10,606 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:59:10,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:10,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1406786617, now seen corresponding path program 10 times [2023-08-26 16:59:10,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:10,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969064475] [2023-08-26 16:59:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:10,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:10,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:10,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969064475] [2023-08-26 16:59:10,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969064475] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:10,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:10,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:59:10,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015710994] [2023-08-26 16:59:10,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:10,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:59:10,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:59:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:59:10,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:59:10,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 638 transitions, 13928 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:10,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:10,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:59:10,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:17,078 INFO L124 PetriNetUnfolderBase]: 24994/33734 cut-off events. [2023-08-26 16:59:17,079 INFO L125 PetriNetUnfolderBase]: For 824682/827965 co-relation queries the response was YES. [2023-08-26 16:59:17,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256085 conditions, 33734 events. 24994/33734 cut-off events. For 824682/827965 co-relation queries the response was YES. Maximal size of possible extension queue 1714. Compared 193520 event pairs, 5406 based on Foata normal form. 3157/36472 useless extension candidates. Maximal degree in co-relation 256017. Up to 15504 conditions per place. [2023-08-26 16:59:17,636 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 236 selfloop transitions, 463 changer transitions 42/757 dead transitions. [2023-08-26 16:59:17,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 757 transitions, 16994 flow [2023-08-26 16:59:17,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:59:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:59:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-08-26 16:59:17,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622568093385214 [2023-08-26 16:59:17,637 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-08-26 16:59:17,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-08-26 16:59:17,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:17,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-08-26 16:59:17,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:17,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:17,639 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:17,639 INFO L175 Difference]: Start difference. First operand has 175 places, 638 transitions, 13928 flow. Second operand 5 states and 594 transitions. [2023-08-26 16:59:17,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 757 transitions, 16994 flow [2023-08-26 16:59:24,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 757 transitions, 16152 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-26 16:59:24,420 INFO L231 Difference]: Finished difference. Result has 177 places, 631 transitions, 13987 flow [2023-08-26 16:59:24,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=13054, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=13987, PETRI_PLACES=177, PETRI_TRANSITIONS=631} [2023-08-26 16:59:24,421 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 123 predicate places. [2023-08-26 16:59:24,421 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 631 transitions, 13987 flow [2023-08-26 16:59:24,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:24,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:24,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:24,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-26 16:59:24,422 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:59:24,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:24,422 INFO L85 PathProgramCache]: Analyzing trace with hash -622877868, now seen corresponding path program 7 times [2023-08-26 16:59:24,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:24,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932281658] [2023-08-26 16:59:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:24,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:24,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:24,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932281658] [2023-08-26 16:59:24,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932281658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:24,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:24,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:59:24,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286504500] [2023-08-26 16:59:24,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:24,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:59:24,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:59:24,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:59:24,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:59:24,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 631 transitions, 13987 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:24,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:24,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:59:24,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:29,983 INFO L124 PetriNetUnfolderBase]: 24060/32357 cut-off events. [2023-08-26 16:59:29,984 INFO L125 PetriNetUnfolderBase]: For 788329/792227 co-relation queries the response was YES. [2023-08-26 16:59:30,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247120 conditions, 32357 events. 24060/32357 cut-off events. For 788329/792227 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 183747 event pairs, 5592 based on Foata normal form. 3296/35369 useless extension candidates. Maximal degree in co-relation 247052. Up to 15721 conditions per place. [2023-08-26 16:59:30,502 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 208 selfloop transitions, 545 changer transitions 11/776 dead transitions. [2023-08-26 16:59:30,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 776 transitions, 18478 flow [2023-08-26 16:59:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:59:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:59:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 587 transitions. [2023-08-26 16:59:30,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45680933852140077 [2023-08-26 16:59:30,503 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 587 transitions. [2023-08-26 16:59:30,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 587 transitions. [2023-08-26 16:59:30,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:30,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 587 transitions. [2023-08-26 16:59:30,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.4) internal successors, (587), 5 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:30,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:30,505 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:30,505 INFO L175 Difference]: Start difference. First operand has 177 places, 631 transitions, 13987 flow. Second operand 5 states and 587 transitions. [2023-08-26 16:59:30,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 776 transitions, 18478 flow [2023-08-26 16:59:36,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 776 transitions, 17614 flow, removed 88 selfloop flow, removed 6 redundant places. [2023-08-26 16:59:36,775 INFO L231 Difference]: Finished difference. Result has 175 places, 722 transitions, 17238 flow [2023-08-26 16:59:36,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=13288, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=17238, PETRI_PLACES=175, PETRI_TRANSITIONS=722} [2023-08-26 16:59:36,776 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 121 predicate places. [2023-08-26 16:59:36,777 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 722 transitions, 17238 flow [2023-08-26 16:59:36,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:36,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:36,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:36,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-26 16:59:36,777 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:59:36,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:36,778 INFO L85 PathProgramCache]: Analyzing trace with hash 425248382, now seen corresponding path program 6 times [2023-08-26 16:59:36,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:36,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60667929] [2023-08-26 16:59:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:36,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:36,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:36,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60667929] [2023-08-26 16:59:36,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60667929] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:36,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:36,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:59:36,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409323696] [2023-08-26 16:59:36,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:36,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:59:36,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:36,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:59:36,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:59:36,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:59:36,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 722 transitions, 17238 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:36,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:36,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:59:36,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:43,376 INFO L124 PetriNetUnfolderBase]: 25219/33992 cut-off events. [2023-08-26 16:59:43,377 INFO L125 PetriNetUnfolderBase]: For 875809/880471 co-relation queries the response was YES. [2023-08-26 16:59:43,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261497 conditions, 33992 events. 25219/33992 cut-off events. For 875809/880471 co-relation queries the response was YES. Maximal size of possible extension queue 1773. Compared 194607 event pairs, 7245 based on Foata normal form. 3309/36816 useless extension candidates. Maximal degree in co-relation 261429. Up to 26538 conditions per place. [2023-08-26 16:59:43,879 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 614 selfloop transitions, 96 changer transitions 95/865 dead transitions. [2023-08-26 16:59:43,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 865 transitions, 21155 flow [2023-08-26 16:59:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:59:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:59:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-08-26 16:59:43,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622568093385214 [2023-08-26 16:59:43,880 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-08-26 16:59:43,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-08-26 16:59:43,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:43,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-08-26 16:59:43,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:43,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:43,883 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:43,883 INFO L175 Difference]: Start difference. First operand has 175 places, 722 transitions, 17238 flow. Second operand 5 states and 594 transitions. [2023-08-26 16:59:43,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 865 transitions, 21155 flow [2023-08-26 16:59:51,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 865 transitions, 20423 flow, removed 366 selfloop flow, removed 0 redundant places. [2023-08-26 16:59:51,062 INFO L231 Difference]: Finished difference. Result has 180 places, 702 transitions, 16428 flow [2023-08-26 16:59:51,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=16588, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=16428, PETRI_PLACES=180, PETRI_TRANSITIONS=702} [2023-08-26 16:59:51,063 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 126 predicate places. [2023-08-26 16:59:51,063 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 702 transitions, 16428 flow [2023-08-26 16:59:51,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:51,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:51,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:51,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-26 16:59:51,064 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 16:59:51,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:51,064 INFO L85 PathProgramCache]: Analyzing trace with hash 902707596, now seen corresponding path program 8 times [2023-08-26 16:59:51,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:51,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501811879] [2023-08-26 16:59:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:51,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:51,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:51,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501811879] [2023-08-26 16:59:51,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501811879] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:51,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860016377] [2023-08-26 16:59:51,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:59:51,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:51,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:51,125 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:51,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 16:59:51,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:51,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:51,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 16:59:51,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:51,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:51,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860016377] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:51,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:51,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 16:59:51,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553750948] [2023-08-26 16:59:51,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:51,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 16:59:51,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:51,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 16:59:51,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-26 16:59:51,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 16:59:51,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 702 transitions, 16428 flow. Second operand has 10 states, 10 states have (on average 108.7) internal successors, (1087), 10 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:51,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:51,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 16:59:51,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:57,104 INFO L124 PetriNetUnfolderBase]: 22812/30738 cut-off events. [2023-08-26 16:59:57,104 INFO L125 PetriNetUnfolderBase]: For 789238/792979 co-relation queries the response was YES. [2023-08-26 16:59:57,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238065 conditions, 30738 events. 22812/30738 cut-off events. For 789238/792979 co-relation queries the response was YES. Maximal size of possible extension queue 1552. Compared 174450 event pairs, 4870 based on Foata normal form. 3415/33899 useless extension candidates. Maximal degree in co-relation 237995. Up to 14385 conditions per place. [2023-08-26 16:59:57,439 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 218 selfloop transitions, 600 changer transitions 27/855 dead transitions. [2023-08-26 16:59:57,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 855 transitions, 21324 flow [2023-08-26 16:59:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 16:59:57,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 16:59:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 708 transitions. [2023-08-26 16:59:57,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591439688715953 [2023-08-26 16:59:57,440 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 708 transitions. [2023-08-26 16:59:57,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 708 transitions. [2023-08-26 16:59:57,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:57,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 708 transitions. [2023-08-26 16:59:57,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.0) internal successors, (708), 6 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:57,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 257.0) internal successors, (1799), 7 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:57,443 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 257.0) internal successors, (1799), 7 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:57,443 INFO L175 Difference]: Start difference. First operand has 180 places, 702 transitions, 16428 flow. Second operand 6 states and 708 transitions. [2023-08-26 16:59:57,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 855 transitions, 21324 flow [2023-08-26 17:00:03,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 855 transitions, 21072 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-08-26 17:00:03,228 INFO L231 Difference]: Finished difference. Result has 181 places, 762 transitions, 19502 flow [2023-08-26 17:00:03,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=16198, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=19502, PETRI_PLACES=181, PETRI_TRANSITIONS=762} [2023-08-26 17:00:03,229 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 127 predicate places. [2023-08-26 17:00:03,229 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 762 transitions, 19502 flow [2023-08-26 17:00:03,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 108.7) internal successors, (1087), 10 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:03,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:00:03,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:00:03,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 17:00:03,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:00:03,433 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 17:00:03,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:00:03,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1776977518, now seen corresponding path program 7 times [2023-08-26 17:00:03,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:00:03,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004042399] [2023-08-26 17:00:03,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:00:03,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:00:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:00:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:03,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:00:03,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004042399] [2023-08-26 17:00:03,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004042399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:00:03,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:00:03,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:00:03,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127587227] [2023-08-26 17:00:03,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:00:03,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:00:03,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:00:03,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:00:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:00:03,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 17:00:03,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 762 transitions, 19502 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:03,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:00:03,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 17:00:03,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:00:08,608 INFO L124 PetriNetUnfolderBase]: 20239/26910 cut-off events. [2023-08-26 17:00:08,608 INFO L125 PetriNetUnfolderBase]: For 741042/744522 co-relation queries the response was YES. [2023-08-26 17:00:08,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208644 conditions, 26910 events. 20239/26910 cut-off events. For 741042/744522 co-relation queries the response was YES. Maximal size of possible extension queue 1345. Compared 143813 event pairs, 4988 based on Foata normal form. 2595/29096 useless extension candidates. Maximal degree in co-relation 208574. Up to 20428 conditions per place. [2023-08-26 17:00:09,055 INFO L140 encePairwiseOnDemand]: 252/257 looper letters, 712 selfloop transitions, 52 changer transitions 84/903 dead transitions. [2023-08-26 17:00:09,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 903 transitions, 23301 flow [2023-08-26 17:00:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:00:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:00:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 591 transitions. [2023-08-26 17:00:09,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599221789883268 [2023-08-26 17:00:09,057 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 591 transitions. [2023-08-26 17:00:09,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 591 transitions. [2023-08-26 17:00:09,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:00:09,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 591 transitions. [2023-08-26 17:00:09,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:09,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:09,059 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:09,059 INFO L175 Difference]: Start difference. First operand has 181 places, 762 transitions, 19502 flow. Second operand 5 states and 591 transitions. [2023-08-26 17:00:09,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 903 transitions, 23301 flow [2023-08-26 17:00:13,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 903 transitions, 20468 flow, removed 564 selfloop flow, removed 8 redundant places. [2023-08-26 17:00:13,974 INFO L231 Difference]: Finished difference. Result has 171 places, 737 transitions, 16330 flow [2023-08-26 17:00:13,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=16669, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=16330, PETRI_PLACES=171, PETRI_TRANSITIONS=737} [2023-08-26 17:00:13,975 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 117 predicate places. [2023-08-26 17:00:13,975 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 737 transitions, 16330 flow [2023-08-26 17:00:13,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:13,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:00:13,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:00:13,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-26 17:00:13,975 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 17:00:13,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:00:13,975 INFO L85 PathProgramCache]: Analyzing trace with hash -163778692, now seen corresponding path program 8 times [2023-08-26 17:00:13,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:00:13,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41386577] [2023-08-26 17:00:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:00:13,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:00:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:00:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:14,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:00:14,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41386577] [2023-08-26 17:00:14,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41386577] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:00:14,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:00:14,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:00:14,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525734562] [2023-08-26 17:00:14,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:00:14,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:00:14,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:00:14,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:00:14,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:00:14,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 17:00:14,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 737 transitions, 16330 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:14,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:00:14,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 17:00:14,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:00:18,356 INFO L124 PetriNetUnfolderBase]: 18903/25180 cut-off events. [2023-08-26 17:00:18,356 INFO L125 PetriNetUnfolderBase]: For 508606/510783 co-relation queries the response was YES. [2023-08-26 17:00:18,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185587 conditions, 25180 events. 18903/25180 cut-off events. For 508606/510783 co-relation queries the response was YES. Maximal size of possible extension queue 1212. Compared 133729 event pairs, 5082 based on Foata normal form. 1850/26564 useless extension candidates. Maximal degree in co-relation 185522. Up to 19888 conditions per place. [2023-08-26 17:00:18,715 INFO L140 encePairwiseOnDemand]: 252/257 looper letters, 659 selfloop transitions, 116 changer transitions 24/817 dead transitions. [2023-08-26 17:00:18,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 817 transitions, 18710 flow [2023-08-26 17:00:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:00:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:00:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 584 transitions. [2023-08-26 17:00:18,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544747081712062 [2023-08-26 17:00:18,716 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 584 transitions. [2023-08-26 17:00:18,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 584 transitions. [2023-08-26 17:00:18,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:00:18,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 584 transitions. [2023-08-26 17:00:18,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:18,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:18,718 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:18,718 INFO L175 Difference]: Start difference. First operand has 171 places, 737 transitions, 16330 flow. Second operand 5 states and 584 transitions. [2023-08-26 17:00:18,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 817 transitions, 18710 flow [2023-08-26 17:00:22,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 817 transitions, 18572 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-26 17:00:22,378 INFO L231 Difference]: Finished difference. Result has 169 places, 722 transitions, 16019 flow [2023-08-26 17:00:22,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=16198, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=16019, PETRI_PLACES=169, PETRI_TRANSITIONS=722} [2023-08-26 17:00:22,379 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 115 predicate places. [2023-08-26 17:00:22,379 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 722 transitions, 16019 flow [2023-08-26 17:00:22,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:22,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:00:22,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:00:22,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-26 17:00:22,379 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 17:00:22,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:00:22,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1512545684, now seen corresponding path program 9 times [2023-08-26 17:00:22,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:00:22,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827676775] [2023-08-26 17:00:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:00:22,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:00:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:00:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:22,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:00:22,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827676775] [2023-08-26 17:00:22,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827676775] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:00:22,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488605868] [2023-08-26 17:00:22,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 17:00:22,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:00:22,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:00:22,437 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:00:22,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 17:00:22,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 17:00:22,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:00:22,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 17:00:22,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:00:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:22,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:00:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:22,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488605868] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:00:22,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:00:22,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 17:00:22,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717960043] [2023-08-26 17:00:22,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:00:22,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 17:00:22,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:00:22,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 17:00:22,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-26 17:00:22,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 17:00:22,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 722 transitions, 16019 flow. Second operand has 10 states, 10 states have (on average 108.7) internal successors, (1087), 10 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:22,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:00:22,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 17:00:22,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:00:26,907 INFO L124 PetriNetUnfolderBase]: 18342/24274 cut-off events. [2023-08-26 17:00:26,907 INFO L125 PetriNetUnfolderBase]: For 465165/467434 co-relation queries the response was YES. [2023-08-26 17:00:27,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177675 conditions, 24274 events. 18342/24274 cut-off events. For 465165/467434 co-relation queries the response was YES. Maximal size of possible extension queue 1217. Compared 127663 event pairs, 2329 based on Foata normal form. 1988/25912 useless extension candidates. Maximal degree in co-relation 177611. Up to 12798 conditions per place. [2023-08-26 17:00:27,253 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 946 selfloop transitions, 97 changer transitions 158/1252 dead transitions. [2023-08-26 17:00:27,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 1252 transitions, 27583 flow [2023-08-26 17:00:27,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 17:00:27,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 17:00:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1175 transitions. [2023-08-26 17:00:27,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4571984435797665 [2023-08-26 17:00:27,255 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1175 transitions. [2023-08-26 17:00:27,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1175 transitions. [2023-08-26 17:00:27,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:00:27,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1175 transitions. [2023-08-26 17:00:27,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 117.5) internal successors, (1175), 10 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:27,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 257.0) internal successors, (2827), 11 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:27,258 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 257.0) internal successors, (2827), 11 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:27,258 INFO L175 Difference]: Start difference. First operand has 169 places, 722 transitions, 16019 flow. Second operand 10 states and 1175 transitions. [2023-08-26 17:00:27,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 1252 transitions, 27583 flow [2023-08-26 17:00:30,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 1252 transitions, 27325 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-26 17:00:30,765 INFO L231 Difference]: Finished difference. Result has 176 places, 707 transitions, 15610 flow [2023-08-26 17:00:30,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=15722, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15610, PETRI_PLACES=176, PETRI_TRANSITIONS=707} [2023-08-26 17:00:30,766 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 122 predicate places. [2023-08-26 17:00:30,766 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 707 transitions, 15610 flow [2023-08-26 17:00:30,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 108.7) internal successors, (1087), 10 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:30,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:00:30,767 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] [2023-08-26 17:00:30,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 17:00:30,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:00:30,967 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 17:00:30,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:00:30,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1429247709, now seen corresponding path program 1 times [2023-08-26 17:00:30,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:00:30,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373039644] [2023-08-26 17:00:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:00:30,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:00:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:00:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:00:31,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:00:31,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373039644] [2023-08-26 17:00:31,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373039644] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:00:31,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139796544] [2023-08-26 17:00:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:00:31,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:00:31,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:00:31,019 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:00:31,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 17:00:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:00:31,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 17:00:31,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:00:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:00:31,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:00:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:00:31,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139796544] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:00:31,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:00:31,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-26 17:00:31,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617398579] [2023-08-26 17:00:31,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:00:31,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 17:00:31,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:00:31,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 17:00:31,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 17:00:31,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 17:00:31,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 707 transitions, 15610 flow. Second operand has 8 states, 8 states have (on average 110.375) internal successors, (883), 8 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:31,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:00:31,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 17:00:31,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:00:34,929 INFO L124 PetriNetUnfolderBase]: 17417/22798 cut-off events. [2023-08-26 17:00:34,929 INFO L125 PetriNetUnfolderBase]: For 430592/432208 co-relation queries the response was YES. [2023-08-26 17:00:35,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172586 conditions, 22798 events. 17417/22798 cut-off events. For 430592/432208 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 113322 event pairs, 1054 based on Foata normal form. 1126/23771 useless extension candidates. Maximal degree in co-relation 172520. Up to 13111 conditions per place. [2023-08-26 17:00:35,547 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 740 selfloop transitions, 112 changer transitions 0/906 dead transitions. [2023-08-26 17:00:35,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 906 transitions, 20103 flow [2023-08-26 17:00:35,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:00:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:00:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 827 transitions. [2023-08-26 17:00:35,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45969983324068925 [2023-08-26 17:00:35,549 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 827 transitions. [2023-08-26 17:00:35,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 827 transitions. [2023-08-26 17:00:35,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:00:35,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 827 transitions. [2023-08-26 17:00:35,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 118.14285714285714) internal successors, (827), 7 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:35,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 257.0) internal successors, (2056), 8 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:35,551 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 257.0) internal successors, (2056), 8 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:35,551 INFO L175 Difference]: Start difference. First operand has 176 places, 707 transitions, 15610 flow. Second operand 7 states and 827 transitions. [2023-08-26 17:00:35,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 906 transitions, 20103 flow [2023-08-26 17:00:39,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 906 transitions, 18593 flow, removed 149 selfloop flow, removed 14 redundant places. [2023-08-26 17:00:39,404 INFO L231 Difference]: Finished difference. Result has 159 places, 726 transitions, 14886 flow [2023-08-26 17:00:39,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=14291, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14886, PETRI_PLACES=159, PETRI_TRANSITIONS=726} [2023-08-26 17:00:39,405 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2023-08-26 17:00:39,405 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 726 transitions, 14886 flow [2023-08-26 17:00:39,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 110.375) internal successors, (883), 8 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:39,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:00:39,406 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] [2023-08-26 17:00:39,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 17:00:39,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-26 17:00:39,612 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 17:00:39,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:00:39,612 INFO L85 PathProgramCache]: Analyzing trace with hash -907478175, now seen corresponding path program 2 times [2023-08-26 17:00:39,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:00:39,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730329371] [2023-08-26 17:00:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:00:39,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:00:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:00:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:00:39,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:00:39,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730329371] [2023-08-26 17:00:39,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730329371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:00:39,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:00:39,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:00:39,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326600653] [2023-08-26 17:00:39,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:00:39,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:00:39,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:00:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:00:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:00:39,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 17:00:39,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 726 transitions, 14886 flow. Second operand has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:39,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:00:39,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 17:00:39,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:00:43,750 INFO L124 PetriNetUnfolderBase]: 19024/24853 cut-off events. [2023-08-26 17:00:43,750 INFO L125 PetriNetUnfolderBase]: For 469138/471033 co-relation queries the response was YES. [2023-08-26 17:00:44,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186365 conditions, 24853 events. 19024/24853 cut-off events. For 469138/471033 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 123560 event pairs, 3741 based on Foata normal form. 1398/25993 useless extension candidates. Maximal degree in co-relation 186305. Up to 17233 conditions per place. [2023-08-26 17:00:44,118 INFO L140 encePairwiseOnDemand]: 252/257 looper letters, 746 selfloop transitions, 137 changer transitions 0/937 dead transitions. [2023-08-26 17:00:44,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 937 transitions, 20173 flow [2023-08-26 17:00:44,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:00:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:00:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 590 transitions. [2023-08-26 17:00:44,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591439688715953 [2023-08-26 17:00:44,120 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 590 transitions. [2023-08-26 17:00:44,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 590 transitions. [2023-08-26 17:00:44,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:00:44,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 590 transitions. [2023-08-26 17:00:44,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:44,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:44,122 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:44,122 INFO L175 Difference]: Start difference. First operand has 159 places, 726 transitions, 14886 flow. Second operand 5 states and 590 transitions. [2023-08-26 17:00:44,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 937 transitions, 20173 flow [2023-08-26 17:00:47,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 937 transitions, 20036 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:00:47,969 INFO L231 Difference]: Finished difference. Result has 164 places, 775 transitions, 16164 flow [2023-08-26 17:00:47,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=14782, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=16164, PETRI_PLACES=164, PETRI_TRANSITIONS=775} [2023-08-26 17:00:47,970 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 110 predicate places. [2023-08-26 17:00:47,970 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 775 transitions, 16164 flow [2023-08-26 17:00:47,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:47,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:00:47,970 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] [2023-08-26 17:00:47,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-26 17:00:47,970 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 17:00:47,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:00:47,970 INFO L85 PathProgramCache]: Analyzing trace with hash -987226423, now seen corresponding path program 3 times [2023-08-26 17:00:47,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:00:47,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222558337] [2023-08-26 17:00:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:00:47,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:00:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:00:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:00:48,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:00:48,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222558337] [2023-08-26 17:00:48,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222558337] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:00:48,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:00:48,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:00:48,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274232260] [2023-08-26 17:00:48,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:00:48,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:00:48,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:00:48,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:00:48,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:00:48,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 17:00:48,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 775 transitions, 16164 flow. Second operand has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:48,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:00:48,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 17:00:48,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:00:52,962 INFO L124 PetriNetUnfolderBase]: 21538/28303 cut-off events. [2023-08-26 17:00:52,962 INFO L125 PetriNetUnfolderBase]: For 522751/523528 co-relation queries the response was YES. [2023-08-26 17:00:53,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218240 conditions, 28303 events. 21538/28303 cut-off events. For 522751/523528 co-relation queries the response was YES. Maximal size of possible extension queue 1230. Compared 145124 event pairs, 1130 based on Foata normal form. 651/28750 useless extension candidates. Maximal degree in co-relation 218177. Up to 17124 conditions per place. [2023-08-26 17:00:53,276 INFO L140 encePairwiseOnDemand]: 252/257 looper letters, 962 selfloop transitions, 72 changer transitions 0/1098 dead transitions. [2023-08-26 17:00:53,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 1098 transitions, 23910 flow [2023-08-26 17:00:53,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:00:53,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:00:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 596 transitions. [2023-08-26 17:00:53,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46381322957198445 [2023-08-26 17:00:53,278 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 596 transitions. [2023-08-26 17:00:53,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 596 transitions. [2023-08-26 17:00:53,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:00:53,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 596 transitions. [2023-08-26 17:00:53,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.2) internal successors, (596), 5 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:53,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:53,279 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:53,279 INFO L175 Difference]: Start difference. First operand has 164 places, 775 transitions, 16164 flow. Second operand 5 states and 596 transitions. [2023-08-26 17:00:53,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 1098 transitions, 23910 flow [2023-08-26 17:00:59,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 1098 transitions, 23654 flow, removed 128 selfloop flow, removed 0 redundant places. [2023-08-26 17:00:59,054 INFO L231 Difference]: Finished difference. Result has 170 places, 811 transitions, 16946 flow [2023-08-26 17:00:59,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=16046, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=16946, PETRI_PLACES=170, PETRI_TRANSITIONS=811} [2023-08-26 17:00:59,055 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 116 predicate places. [2023-08-26 17:00:59,055 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 811 transitions, 16946 flow [2023-08-26 17:00:59,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:59,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:00:59,055 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] [2023-08-26 17:00:59,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-08-26 17:00:59,055 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 17:00:59,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:00:59,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1167613251, now seen corresponding path program 4 times [2023-08-26 17:00:59,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:00:59,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656794592] [2023-08-26 17:00:59,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:00:59,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:00:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:00:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 17:00:59,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:00:59,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656794592] [2023-08-26 17:00:59,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656794592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:00:59,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719528043] [2023-08-26 17:00:59,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:00:59,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:00:59,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:00:59,113 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:00:59,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 17:00:59,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:00:59,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:00:59,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 17:00:59,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:00:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 17:00:59,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:00:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 17:00:59,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719528043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:00:59,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:00:59,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 17:00:59,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605697633] [2023-08-26 17:00:59,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:00:59,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 17:00:59,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:00:59,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 17:00:59,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-26 17:00:59,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 17:00:59,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 811 transitions, 16946 flow. Second operand has 10 states, 10 states have (on average 108.9) internal successors, (1089), 10 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:59,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:00:59,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 17:00:59,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:01:05,025 INFO L124 PetriNetUnfolderBase]: 23894/31309 cut-off events. [2023-08-26 17:01:05,025 INFO L125 PetriNetUnfolderBase]: For 624174/626151 co-relation queries the response was YES. [2023-08-26 17:01:05,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245859 conditions, 31309 events. 23894/31309 cut-off events. For 624174/626151 co-relation queries the response was YES. Maximal size of possible extension queue 1458. Compared 162264 event pairs, 2099 based on Foata normal form. 1338/32549 useless extension candidates. Maximal degree in co-relation 245793. Up to 18549 conditions per place. [2023-08-26 17:01:05,417 INFO L140 encePairwiseOnDemand]: 251/257 looper letters, 604 selfloop transitions, 619 changer transitions 0/1245 dead transitions. [2023-08-26 17:01:05,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 1245 transitions, 26601 flow [2023-08-26 17:01:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 17:01:05,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 17:01:05,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1179 transitions. [2023-08-26 17:01:05,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45875486381322955 [2023-08-26 17:01:05,419 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1179 transitions. [2023-08-26 17:01:05,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1179 transitions. [2023-08-26 17:01:05,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:01:05,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1179 transitions. [2023-08-26 17:01:05,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 117.9) internal successors, (1179), 10 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:05,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 257.0) internal successors, (2827), 11 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:05,421 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 257.0) internal successors, (2827), 11 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:05,422 INFO L175 Difference]: Start difference. First operand has 170 places, 811 transitions, 16946 flow. Second operand 10 states and 1179 transitions. [2023-08-26 17:01:05,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 1245 transitions, 26601 flow [2023-08-26 17:01:11,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 1245 transitions, 26500 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:01:11,747 INFO L231 Difference]: Finished difference. Result has 181 places, 886 transitions, 20175 flow [2023-08-26 17:01:11,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=16904, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20175, PETRI_PLACES=181, PETRI_TRANSITIONS=886} [2023-08-26 17:01:11,747 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 127 predicate places. [2023-08-26 17:01:11,747 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 886 transitions, 20175 flow [2023-08-26 17:01:11,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 108.9) internal successors, (1089), 10 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:11,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:01:11,748 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] [2023-08-26 17:01:11,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 17:01:11,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-26 17:01:11,954 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 17:01:11,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:01:11,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1528871333, now seen corresponding path program 5 times [2023-08-26 17:01:11,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:01:11,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291814240] [2023-08-26 17:01:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:01:11,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:01:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:01:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 17:01:12,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:01:12,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291814240] [2023-08-26 17:01:12,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291814240] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:01:12,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:01:12,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:01:12,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22202070] [2023-08-26 17:01:12,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:01:12,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:01:12,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:01:12,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:01:12,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:01:12,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 17:01:12,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 886 transitions, 20175 flow. Second operand has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:12,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:01:12,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 17:01:12,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:01:19,748 INFO L124 PetriNetUnfolderBase]: 29215/38228 cut-off events. [2023-08-26 17:01:19,748 INFO L125 PetriNetUnfolderBase]: For 927857/929239 co-relation queries the response was YES. [2023-08-26 17:01:20,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315260 conditions, 38228 events. 29215/38228 cut-off events. For 927857/929239 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 201469 event pairs, 5176 based on Foata normal form. 1101/38903 useless extension candidates. Maximal degree in co-relation 315190. Up to 25661 conditions per place. [2023-08-26 17:01:20,421 INFO L140 encePairwiseOnDemand]: 252/257 looper letters, 1061 selfloop transitions, 195 changer transitions 0/1320 dead transitions. [2023-08-26 17:01:20,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1320 transitions, 31008 flow [2023-08-26 17:01:20,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:01:20,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:01:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 592 transitions. [2023-08-26 17:01:20,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070038910505834 [2023-08-26 17:01:20,423 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 592 transitions. [2023-08-26 17:01:20,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 592 transitions. [2023-08-26 17:01:20,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:01:20,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 592 transitions. [2023-08-26 17:01:20,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.4) internal successors, (592), 5 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:20,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:20,424 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:20,424 INFO L175 Difference]: Start difference. First operand has 181 places, 886 transitions, 20175 flow. Second operand 5 states and 592 transitions. [2023-08-26 17:01:20,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 1320 transitions, 31008 flow [2023-08-26 17:01:32,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 1320 transitions, 30212 flow, removed 133 selfloop flow, removed 1 redundant places. [2023-08-26 17:01:32,058 INFO L231 Difference]: Finished difference. Result has 187 places, 1045 transitions, 23654 flow [2023-08-26 17:01:32,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=19609, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=23654, PETRI_PLACES=187, PETRI_TRANSITIONS=1045} [2023-08-26 17:01:32,059 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 133 predicate places. [2023-08-26 17:01:32,059 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 1045 transitions, 23654 flow [2023-08-26 17:01:32,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:32,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:01:32,059 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] [2023-08-26 17:01:32,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-08-26 17:01:32,060 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 17:01:32,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:01:32,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1238437065, now seen corresponding path program 6 times [2023-08-26 17:01:32,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:01:32,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528167548] [2023-08-26 17:01:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:01:32,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:01:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:01:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 17:01:32,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:01:32,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528167548] [2023-08-26 17:01:32,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528167548] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:01:32,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:01:32,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:01:32,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841166225] [2023-08-26 17:01:32,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:01:32,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:01:32,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:01:32,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:01:32,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:01:32,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 17:01:32,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 1045 transitions, 23654 flow. Second operand has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:32,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:01:32,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 17:01:32,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:01:40,400 INFO L124 PetriNetUnfolderBase]: 28624/37531 cut-off events. [2023-08-26 17:01:40,401 INFO L125 PetriNetUnfolderBase]: For 948499/950140 co-relation queries the response was YES. [2023-08-26 17:01:40,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318622 conditions, 37531 events. 28624/37531 cut-off events. For 948499/950140 co-relation queries the response was YES. Maximal size of possible extension queue 1655. Compared 197752 event pairs, 4315 based on Foata normal form. 1223/38444 useless extension candidates. Maximal degree in co-relation 318548. Up to 22276 conditions per place. [2023-08-26 17:01:41,069 INFO L140 encePairwiseOnDemand]: 252/257 looper letters, 889 selfloop transitions, 435 changer transitions 0/1388 dead transitions. [2023-08-26 17:01:41,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 1388 transitions, 33045 flow [2023-08-26 17:01:41,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:01:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:01:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 593 transitions. [2023-08-26 17:01:41,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4614785992217899 [2023-08-26 17:01:41,071 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 593 transitions. [2023-08-26 17:01:41,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 593 transitions. [2023-08-26 17:01:41,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:01:41,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 593 transitions. [2023-08-26 17:01:41,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:41,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:41,074 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:41,074 INFO L175 Difference]: Start difference. First operand has 187 places, 1045 transitions, 23654 flow. Second operand 5 states and 593 transitions. [2023-08-26 17:01:41,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 1388 transitions, 33045 flow [2023-08-26 17:01:52,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 1388 transitions, 32673 flow, removed 126 selfloop flow, removed 1 redundant places. [2023-08-26 17:01:52,490 INFO L231 Difference]: Finished difference. Result has 192 places, 1190 transitions, 27920 flow [2023-08-26 17:01:52,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=23312, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=27920, PETRI_PLACES=192, PETRI_TRANSITIONS=1190} [2023-08-26 17:01:52,491 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 138 predicate places. [2023-08-26 17:01:52,491 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 1190 transitions, 27920 flow [2023-08-26 17:01:52,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:52,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:01:52,491 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] [2023-08-26 17:01:52,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-08-26 17:01:52,492 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 17:01:52,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:01:52,492 INFO L85 PathProgramCache]: Analyzing trace with hash 623601603, now seen corresponding path program 7 times [2023-08-26 17:01:52,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:01:52,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782610145] [2023-08-26 17:01:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:01:52,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:01:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:01:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 17:01:52,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:01:52,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782610145] [2023-08-26 17:01:52,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782610145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:01:52,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:01:52,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:01:52,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974634200] [2023-08-26 17:01:52,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:01:52,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:01:52,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:01:52,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:01:52,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:01:52,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 17:01:52,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 1190 transitions, 27920 flow. Second operand has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:52,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:01:52,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 17:01:52,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:02:01,465 INFO L124 PetriNetUnfolderBase]: 28778/37769 cut-off events. [2023-08-26 17:02:01,466 INFO L125 PetriNetUnfolderBase]: For 995444/996932 co-relation queries the response was YES. [2023-08-26 17:02:01,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329809 conditions, 37769 events. 28778/37769 cut-off events. For 995444/996932 co-relation queries the response was YES. Maximal size of possible extension queue 1717. Compared 201205 event pairs, 5603 based on Foata normal form. 940/38203 useless extension candidates. Maximal degree in co-relation 329733. Up to 29345 conditions per place. [2023-08-26 17:02:02,186 INFO L140 encePairwiseOnDemand]: 252/257 looper letters, 1033 selfloop transitions, 165 changer transitions 36/1298 dead transitions. [2023-08-26 17:02:02,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 1298 transitions, 32061 flow [2023-08-26 17:02:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:02:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:02:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 585 transitions. [2023-08-26 17:02:02,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45525291828793774 [2023-08-26 17:02:02,192 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 585 transitions. [2023-08-26 17:02:02,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 585 transitions. [2023-08-26 17:02:02,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:02:02,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 585 transitions. [2023-08-26 17:02:02,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:02,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:02,196 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:02,196 INFO L175 Difference]: Start difference. First operand has 192 places, 1190 transitions, 27920 flow. Second operand 5 states and 585 transitions. [2023-08-26 17:02:02,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 1298 transitions, 32061 flow [2023-08-26 17:02:15,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 1298 transitions, 30986 flow, removed 335 selfloop flow, removed 1 redundant places. [2023-08-26 17:02:15,577 INFO L231 Difference]: Finished difference. Result has 195 places, 1184 transitions, 27037 flow [2023-08-26 17:02:15,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=26845, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1025, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=27037, PETRI_PLACES=195, PETRI_TRANSITIONS=1184} [2023-08-26 17:02:15,578 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 141 predicate places. [2023-08-26 17:02:15,578 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 1184 transitions, 27037 flow [2023-08-26 17:02:15,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:15,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:02:15,578 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] [2023-08-26 17:02:15,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-08-26 17:02:15,579 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 17:02:15,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:02:15,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1338653433, now seen corresponding path program 8 times [2023-08-26 17:02:15,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:02:15,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834375582] [2023-08-26 17:02:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:02:15,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:02:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:02:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 17:02:15,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:02:15,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834375582] [2023-08-26 17:02:15,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834375582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:02:15,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:02:15,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:02:15,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203442685] [2023-08-26 17:02:15,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:02:15,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:02:15,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:02:15,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:02:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:02:15,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 17:02:15,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 1184 transitions, 27037 flow. Second operand has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:15,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:02:15,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 17:02:15,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:02:22,969 INFO L124 PetriNetUnfolderBase]: 27854/36596 cut-off events. [2023-08-26 17:02:22,969 INFO L125 PetriNetUnfolderBase]: For 940393/943161 co-relation queries the response was YES. [2023-08-26 17:02:23,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313093 conditions, 36596 events. 27854/36596 cut-off events. For 940393/943161 co-relation queries the response was YES. Maximal size of possible extension queue 1702. Compared 194286 event pairs, 4433 based on Foata normal form. 1662/37956 useless extension candidates. Maximal degree in co-relation 313017. Up to 22127 conditions per place. [2023-08-26 17:02:23,748 INFO L140 encePairwiseOnDemand]: 252/257 looper letters, 745 selfloop transitions, 489 changer transitions 51/1313 dead transitions. [2023-08-26 17:02:23,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1313 transitions, 31567 flow [2023-08-26 17:02:23,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:02:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:02:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 590 transitions. [2023-08-26 17:02:23,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591439688715953 [2023-08-26 17:02:23,750 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 590 transitions. [2023-08-26 17:02:23,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 590 transitions. [2023-08-26 17:02:23,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:02:23,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 590 transitions. [2023-08-26 17:02:23,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:23,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:23,751 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:23,751 INFO L175 Difference]: Start difference. First operand has 195 places, 1184 transitions, 27037 flow. Second operand 5 states and 590 transitions. [2023-08-26 17:02:23,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1313 transitions, 31567 flow [2023-08-26 17:02:38,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 1313 transitions, 31358 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:02:38,428 INFO L231 Difference]: Finished difference. Result has 197 places, 1178 transitions, 27834 flow [2023-08-26 17:02:38,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=26848, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=489, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=27834, PETRI_PLACES=197, PETRI_TRANSITIONS=1178} [2023-08-26 17:02:38,429 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 143 predicate places. [2023-08-26 17:02:38,429 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 1178 transitions, 27834 flow [2023-08-26 17:02:38,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:38,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:02:38,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:02:38,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-08-26 17:02:38,430 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 17:02:38,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:02:38,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1248727873, now seen corresponding path program 9 times [2023-08-26 17:02:38,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:02:38,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902083631] [2023-08-26 17:02:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:02:38,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:02:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:02:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 17:02:38,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:02:38,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902083631] [2023-08-26 17:02:38,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902083631] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:02:38,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:02:38,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:02:38,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724958982] [2023-08-26 17:02:38,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:02:38,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:02:38,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:02:38,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:02:38,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:02:38,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 257 [2023-08-26 17:02:38,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 1178 transitions, 27834 flow. Second operand has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:38,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:02:38,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 257 [2023-08-26 17:02:38,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand