/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/parallel-ticket-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:24:13,014 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:24:13,082 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 13:24:13,085 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:24:13,086 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:24:13,104 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:24:13,105 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:24:13,105 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:24:13,106 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:24:13,110 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:24:13,110 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:24:13,111 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:24:13,111 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:24:13,112 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:24:13,112 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:24:13,112 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:24:13,112 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:24:13,112 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:24:13,112 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:24:13,113 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:24:13,113 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:24:13,114 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:24:13,114 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:24:13,114 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:24:13,114 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:24:13,115 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:24:13,115 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:24:13,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:24:13,115 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:24:13,115 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:24:13,116 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:24:13,116 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:24:13,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:24:13,116 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:24:13,116 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:24:13,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:24:13,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:24:13,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:24:13,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:24:13,422 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:24:13,423 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:24:13,423 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-ticket-4.wvr.c [2023-08-26 13:24:14,426 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:24:14,589 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:24:14,589 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-4.wvr.c [2023-08-26 13:24:14,595 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dbe24ab1/bfb8d45ecee64238b43828196defe6c6/FLAG7f1b62770 [2023-08-26 13:24:14,609 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dbe24ab1/bfb8d45ecee64238b43828196defe6c6 [2023-08-26 13:24:14,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:24:14,614 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:24:14,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:24:14,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:24:14,617 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:24:14,618 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:24:14" (1/1) ... [2023-08-26 13:24:14,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c035a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:14, skipping insertion in model container [2023-08-26 13:24:14,619 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:24:14" (1/1) ... [2023-08-26 13:24:14,635 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:24:14,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:24:14,799 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:24:14,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:24:14,837 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:24:14,837 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:24:14,842 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:24:14,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:14 WrapperNode [2023-08-26 13:24:14,844 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:24:14,845 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:24:14,845 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:24:14,845 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:24:14,850 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:14" (1/1) ... [2023-08-26 13:24:14,865 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:14" (1/1) ... [2023-08-26 13:24:14,893 INFO L138 Inliner]: procedures = 23, calls = 71, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 208 [2023-08-26 13:24:14,893 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:24:14,894 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:24:14,894 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:24:14,894 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:24:14,900 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:14" (1/1) ... [2023-08-26 13:24:14,900 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:14" (1/1) ... [2023-08-26 13:24:14,909 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:14" (1/1) ... [2023-08-26 13:24:14,910 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:14" (1/1) ... [2023-08-26 13:24:14,918 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:14" (1/1) ... [2023-08-26 13:24:14,919 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:14" (1/1) ... [2023-08-26 13:24:14,920 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:14" (1/1) ... [2023-08-26 13:24:14,921 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:14" (1/1) ... [2023-08-26 13:24:14,923 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:24:14,923 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:24:14,923 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:24:14,923 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:24:14,924 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:14" (1/1) ... [2023-08-26 13:24:14,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:24:14,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:24:14,986 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 13:24:15,014 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 13:24:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:24:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:24:15,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:24:15,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:24:15,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:24:15,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 13:24:15,035 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 13:24:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-26 13:24:15,035 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-26 13:24:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:24:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:24:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:24:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 13:24:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 13:24:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:24:15,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:24:15,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:24:15,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:24:15,046 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 13:24:15,122 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:24:15,123 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:24:15,399 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:24:15,458 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:24:15,458 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 13:24:15,460 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:24:15 BoogieIcfgContainer [2023-08-26 13:24:15,460 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:24:15,461 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:24:15,461 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:24:15,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:24:15,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:24:14" (1/3) ... [2023-08-26 13:24:15,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d65cc34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:24:15, skipping insertion in model container [2023-08-26 13:24:15,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:14" (2/3) ... [2023-08-26 13:24:15,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d65cc34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:24:15, skipping insertion in model container [2023-08-26 13:24:15,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:24:15" (3/3) ... [2023-08-26 13:24:15,465 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-4.wvr.c [2023-08-26 13:24:15,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:24:15,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-26 13:24:15,476 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:24:15,526 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 13:24:15,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 160 transitions, 352 flow [2023-08-26 13:24:15,619 INFO L124 PetriNetUnfolderBase]: 2/156 cut-off events. [2023-08-26 13:24:15,620 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 13:24:15,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 156 events. 2/156 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 110 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-08-26 13:24:15,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 160 transitions, 352 flow [2023-08-26 13:24:15,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 143 transitions, 310 flow [2023-08-26 13:24:15,635 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:24:15,641 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 143 transitions, 310 flow [2023-08-26 13:24:15,649 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 143 transitions, 310 flow [2023-08-26 13:24:15,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 143 transitions, 310 flow [2023-08-26 13:24:15,686 INFO L124 PetriNetUnfolderBase]: 2/143 cut-off events. [2023-08-26 13:24:15,686 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 13:24:15,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 143 events. 2/143 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 109 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-08-26 13:24:15,688 INFO L119 LiptonReduction]: Number of co-enabled transitions 1702 [2023-08-26 13:24:19,890 INFO L134 LiptonReduction]: Checked pairs total: 8882 [2023-08-26 13:24:19,890 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-08-26 13:24:19,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:24:19,916 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;@23cf3333, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:24:19,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-26 13:24:19,917 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:24:19,917 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 13:24:19,917 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:24:19,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:19,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:24:19,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:24:19,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:19,921 INFO L85 PathProgramCache]: Analyzing trace with hash 624, now seen corresponding path program 1 times [2023-08-26 13:24:19,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:19,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86203052] [2023-08-26 13:24:19,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:19,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:19,992 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 13:24:19,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:19,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86203052] [2023-08-26 13:24:19,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86203052] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:19,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:19,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:24:19,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940156942] [2023-08-26 13:24:19,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:20,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:24:20,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:20,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:24:20,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:24:20,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 290 [2023-08-26 13:24:20,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 124 flow. Second operand has 2 states, 2 states have (on average 137.5) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:20,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:20,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 290 [2023-08-26 13:24:20,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:20,390 INFO L124 PetriNetUnfolderBase]: 4185/6232 cut-off events. [2023-08-26 13:24:20,390 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2023-08-26 13:24:20,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12377 conditions, 6232 events. 4185/6232 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35356 event pairs, 4185 based on Foata normal form. 0/5347 useless extension candidates. Maximal degree in co-relation 10236. Up to 5885 conditions per place. [2023-08-26 13:24:20,430 INFO L140 encePairwiseOnDemand]: 288/290 looper letters, 43 selfloop transitions, 0 changer transitions 0/48 dead transitions. [2023-08-26 13:24:20,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 48 transitions, 206 flow [2023-08-26 13:24:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:24:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:24:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 319 transitions. [2023-08-26 13:24:20,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-08-26 13:24:20,440 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 319 transitions. [2023-08-26 13:24:20,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 319 transitions. [2023-08-26 13:24:20,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:20,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 319 transitions. [2023-08-26 13:24:20,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:20,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 290.0) internal successors, (870), 3 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:20,448 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 290.0) internal successors, (870), 3 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:20,449 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 124 flow. Second operand 2 states and 319 transitions. [2023-08-26 13:24:20,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 48 transitions, 206 flow [2023-08-26 13:24:20,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 48 transitions, 190 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-26 13:24:20,455 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 104 flow [2023-08-26 13:24:20,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-26 13:24:20,459 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-08-26 13:24:20,459 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 104 flow [2023-08-26 13:24:20,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 137.5) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:20,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:20,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:24:20,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:24:20,460 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 13:24:20,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:20,460 INFO L85 PathProgramCache]: Analyzing trace with hash 612475, now seen corresponding path program 1 times [2023-08-26 13:24:20,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:20,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000290249] [2023-08-26 13:24:20,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:20,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:20,757 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 13:24:20,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:20,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000290249] [2023-08-26 13:24:20,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000290249] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:20,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:20,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:24:20,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008357529] [2023-08-26 13:24:20,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:20,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:24:20,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:20,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:24:20,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:24:20,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 290 [2023-08-26 13:24:20,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:20,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:20,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 290 [2023-08-26 13:24:20,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:21,062 INFO L124 PetriNetUnfolderBase]: 4038/6015 cut-off events. [2023-08-26 13:24:21,062 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 13:24:21,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11772 conditions, 6015 events. 4038/6015 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34065 event pairs, 4038 based on Foata normal form. 0/5198 useless extension candidates. Maximal degree in co-relation 11769. Up to 5669 conditions per place. [2023-08-26 13:24:21,090 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 40 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-26 13:24:21,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 182 flow [2023-08-26 13:24:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 361 transitions. [2023-08-26 13:24:21,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4149425287356322 [2023-08-26 13:24:21,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 361 transitions. [2023-08-26 13:24:21,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 361 transitions. [2023-08-26 13:24:21,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:21,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 361 transitions. [2023-08-26 13:24:21,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,101 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 104 flow. Second operand 3 states and 361 transitions. [2023-08-26 13:24:21,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 182 flow [2023-08-26 13:24:21,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:24:21,106 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 102 flow [2023-08-26 13:24:21,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-08-26 13:24:21,106 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-08-26 13:24:21,106 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 102 flow [2023-08-26 13:24:21,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:21,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:24:21,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:24:21,107 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 13:24:21,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash 612474, now seen corresponding path program 1 times [2023-08-26 13:24:21,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:21,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882451405] [2023-08-26 13:24:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:21,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:21,175 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 13:24:21,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:21,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882451405] [2023-08-26 13:24:21,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882451405] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:21,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:21,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:24:21,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741135627] [2023-08-26 13:24:21,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:21,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:24:21,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:21,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:24:21,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:24:21,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 290 [2023-08-26 13:24:21,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:21,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 290 [2023-08-26 13:24:21,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:21,486 INFO L124 PetriNetUnfolderBase]: 3891/5798 cut-off events. [2023-08-26 13:24:21,486 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 13:24:21,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11342 conditions, 5798 events. 3891/5798 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32746 event pairs, 3891 based on Foata normal form. 0/5049 useless extension candidates. Maximal degree in co-relation 11338. Up to 5454 conditions per place. [2023-08-26 13:24:21,510 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 38 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-26 13:24:21,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 44 transitions, 176 flow [2023-08-26 13:24:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-26 13:24:21,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264367816091954 [2023-08-26 13:24:21,512 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-26 13:24:21,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-26 13:24:21,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:21,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-26 13:24:21,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,515 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 102 flow. Second operand 3 states and 371 transitions. [2023-08-26 13:24:21,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 44 transitions, 176 flow [2023-08-26 13:24:21,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:21,517 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 99 flow [2023-08-26 13:24:21,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-08-26 13:24:21,518 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2023-08-26 13:24:21,518 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 99 flow [2023-08-26 13:24:21,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:21,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:24:21,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:24:21,521 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 13:24:21,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:21,521 INFO L85 PathProgramCache]: Analyzing trace with hash 588601158, now seen corresponding path program 1 times [2023-08-26 13:24:21,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:21,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663723132] [2023-08-26 13:24:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:21,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:21,601 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 13:24:21,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:21,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663723132] [2023-08-26 13:24:21,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663723132] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:21,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:21,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:24:21,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979754594] [2023-08-26 13:24:21,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:21,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:24:21,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:21,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:24:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:24:21,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 290 [2023-08-26 13:24:21,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:21,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 290 [2023-08-26 13:24:21,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:21,872 INFO L124 PetriNetUnfolderBase]: 3843/5714 cut-off events. [2023-08-26 13:24:21,872 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 13:24:21,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11179 conditions, 5714 events. 3843/5714 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32278 event pairs, 3843 based on Foata normal form. 0/4998 useless extension candidates. Maximal degree in co-relation 11175. Up to 5374 conditions per place. [2023-08-26 13:24:21,887 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 36 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-26 13:24:21,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 169 flow [2023-08-26 13:24:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:21,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-26 13:24:21,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241379310344828 [2023-08-26 13:24:21,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-26 13:24:21,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-26 13:24:21,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:21,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-26 13:24:21,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,891 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 99 flow. Second operand 3 states and 369 transitions. [2023-08-26 13:24:21,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 169 flow [2023-08-26 13:24:21,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:21,892 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 96 flow [2023-08-26 13:24:21,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-26 13:24:21,893 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -11 predicate places. [2023-08-26 13:24:21,893 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 96 flow [2023-08-26 13:24:21,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:21,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:24:21,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:24:21,894 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 13:24:21,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:21,895 INFO L85 PathProgramCache]: Analyzing trace with hash 588601157, now seen corresponding path program 1 times [2023-08-26 13:24:21,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:21,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264660326] [2023-08-26 13:24:21,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:21,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:21,939 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 13:24:21,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:21,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264660326] [2023-08-26 13:24:21,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264660326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:21,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:21,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:24:21,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686121558] [2023-08-26 13:24:21,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:21,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:24:21,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:24:21,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:24:21,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 290 [2023-08-26 13:24:21,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:21,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:21,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 290 [2023-08-26 13:24:21,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:22,158 INFO L124 PetriNetUnfolderBase]: 3795/5630 cut-off events. [2023-08-26 13:24:22,159 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 13:24:22,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11016 conditions, 5630 events. 3795/5630 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 31757 event pairs, 3795 based on Foata normal form. 0/4947 useless extension candidates. Maximal degree in co-relation 11012. Up to 5294 conditions per place. [2023-08-26 13:24:22,177 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 34 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-26 13:24:22,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 162 flow [2023-08-26 13:24:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-08-26 13:24:22,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40804597701149425 [2023-08-26 13:24:22,179 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-08-26 13:24:22,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-08-26 13:24:22,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:22,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-08-26 13:24:22,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,181 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 96 flow. Second operand 3 states and 355 transitions. [2023-08-26 13:24:22,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 162 flow [2023-08-26 13:24:22,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 40 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:22,183 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 93 flow [2023-08-26 13:24:22,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-26 13:24:22,183 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -12 predicate places. [2023-08-26 13:24:22,183 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 93 flow [2023-08-26 13:24:22,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:22,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:22,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:24:22,184 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 13:24:22,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:22,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1289957359, now seen corresponding path program 1 times [2023-08-26 13:24:22,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:22,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976335123] [2023-08-26 13:24:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:22,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:22,230 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 13:24:22,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:22,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976335123] [2023-08-26 13:24:22,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976335123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:22,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:22,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:24:22,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192570462] [2023-08-26 13:24:22,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:22,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:24:22,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:22,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:24:22,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:24:22,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 290 [2023-08-26 13:24:22,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:22,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 290 [2023-08-26 13:24:22,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:22,476 INFO L124 PetriNetUnfolderBase]: 3648/5399 cut-off events. [2023-08-26 13:24:22,476 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 13:24:22,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10571 conditions, 5399 events. 3648/5399 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 30155 event pairs, 3648 based on Foata normal form. 0/4788 useless extension candidates. Maximal degree in co-relation 10567. Up to 5079 conditions per place. [2023-08-26 13:24:22,493 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 32 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-26 13:24:22,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 155 flow [2023-08-26 13:24:22,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:22,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-26 13:24:22,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41954022988505746 [2023-08-26 13:24:22,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-26 13:24:22,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-26 13:24:22,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:22,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-26 13:24:22,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,497 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 93 flow. Second operand 3 states and 365 transitions. [2023-08-26 13:24:22,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 155 flow [2023-08-26 13:24:22,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 38 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:22,498 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 90 flow [2023-08-26 13:24:22,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2023-08-26 13:24:22,499 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -13 predicate places. [2023-08-26 13:24:22,499 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 90 flow [2023-08-26 13:24:22,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:22,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:22,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:24:22,500 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 13:24:22,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:22,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1289957357, now seen corresponding path program 1 times [2023-08-26 13:24:22,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:22,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300176954] [2023-08-26 13:24:22,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:22,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:22,524 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 13:24:22,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:22,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300176954] [2023-08-26 13:24:22,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300176954] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:22,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:22,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:24:22,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934160614] [2023-08-26 13:24:22,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:22,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:24:22,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:22,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:24:22,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:24:22,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 290 [2023-08-26 13:24:22,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:22,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 290 [2023-08-26 13:24:22,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:22,774 INFO L124 PetriNetUnfolderBase]: 3501/5168 cut-off events. [2023-08-26 13:24:22,774 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 13:24:22,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10126 conditions, 5168 events. 3501/5168 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 28588 event pairs, 3501 based on Foata normal form. 0/4629 useless extension candidates. Maximal degree in co-relation 10122. Up to 4864 conditions per place. [2023-08-26 13:24:22,786 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 30 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-26 13:24:22,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 36 transitions, 148 flow [2023-08-26 13:24:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:22,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-08-26 13:24:22,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40344827586206894 [2023-08-26 13:24:22,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-08-26 13:24:22,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-08-26 13:24:22,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:22,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-08-26 13:24:22,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,790 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,790 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 90 flow. Second operand 3 states and 351 transitions. [2023-08-26 13:24:22,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 36 transitions, 148 flow [2023-08-26 13:24:22,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 36 transitions, 147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:22,791 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 87 flow [2023-08-26 13:24:22,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-08-26 13:24:22,791 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -14 predicate places. [2023-08-26 13:24:22,791 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 87 flow [2023-08-26 13:24:22,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:22,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:22,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:24:22,792 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 13:24:22,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:22,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1596542139, now seen corresponding path program 1 times [2023-08-26 13:24:22,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:22,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929049759] [2023-08-26 13:24:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:22,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:22,816 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 13:24:22,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:22,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929049759] [2023-08-26 13:24:22,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929049759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:22,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:22,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:24:22,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688357477] [2023-08-26 13:24:22,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:22,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:24:22,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:22,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:24:22,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:24:22,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 290 [2023-08-26 13:24:22,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:22,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 290 [2023-08-26 13:24:22,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:22,982 INFO L124 PetriNetUnfolderBase]: 2733/4080 cut-off events. [2023-08-26 13:24:22,982 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 13:24:22,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8015 conditions, 4080 events. 2733/4080 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 21953 event pairs, 2733 based on Foata normal form. 0/3797 useless extension candidates. Maximal degree in co-relation 8011. Up to 3840 conditions per place. [2023-08-26 13:24:22,994 INFO L140 encePairwiseOnDemand]: 288/290 looper letters, 29 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-26 13:24:22,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 35 transitions, 145 flow [2023-08-26 13:24:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:22,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 361 transitions. [2023-08-26 13:24:22,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4149425287356322 [2023-08-26 13:24:22,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 361 transitions. [2023-08-26 13:24:22,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 361 transitions. [2023-08-26 13:24:22,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:22,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 361 transitions. [2023-08-26 13:24:22,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:22,998 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 87 flow. Second operand 3 states and 361 transitions. [2023-08-26 13:24:22,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 35 transitions, 145 flow [2023-08-26 13:24:22,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 35 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:22,999 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 86 flow [2023-08-26 13:24:22,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2023-08-26 13:24:22,999 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -14 predicate places. [2023-08-26 13:24:23,000 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 86 flow [2023-08-26 13:24:23,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:23,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:23,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:23,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:24:23,000 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 13:24:23,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:23,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1596542137, now seen corresponding path program 1 times [2023-08-26 13:24:23,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:23,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311695839] [2023-08-26 13:24:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:23,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:23,118 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 13:24:23,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:23,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311695839] [2023-08-26 13:24:23,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311695839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:23,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:23,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:24:23,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380361685] [2023-08-26 13:24:23,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:23,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:24:23,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:23,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:24:23,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:24:23,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 290 [2023-08-26 13:24:23,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:23,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:23,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 290 [2023-08-26 13:24:23,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:23,298 INFO L124 PetriNetUnfolderBase]: 1965/2992 cut-off events. [2023-08-26 13:24:23,298 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 13:24:23,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5904 conditions, 2992 events. 1965/2992 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15514 event pairs, 1965 based on Foata normal form. 0/2965 useless extension candidates. Maximal degree in co-relation 5900. Up to 2816 conditions per place. [2023-08-26 13:24:23,305 INFO L140 encePairwiseOnDemand]: 288/290 looper letters, 28 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-26 13:24:23,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 34 transitions, 142 flow [2023-08-26 13:24:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:23,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:23,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-08-26 13:24:23,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3689655172413793 [2023-08-26 13:24:23,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-08-26 13:24:23,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-08-26 13:24:23,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:23,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-08-26 13:24:23,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:23,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:23,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:23,309 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 86 flow. Second operand 3 states and 321 transitions. [2023-08-26 13:24:23,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 34 transitions, 142 flow [2023-08-26 13:24:23,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 34 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:23,310 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 85 flow [2023-08-26 13:24:23,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2023-08-26 13:24:23,311 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -14 predicate places. [2023-08-26 13:24:23,311 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 85 flow [2023-08-26 13:24:23,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:23,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:23,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:23,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 13:24:23,311 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 13:24:23,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:23,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1776782171, now seen corresponding path program 1 times [2023-08-26 13:24:23,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:23,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519336820] [2023-08-26 13:24:23,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:23,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:23,690 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 13:24:23,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:23,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519336820] [2023-08-26 13:24:23,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519336820] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:23,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:23,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:24:23,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142839792] [2023-08-26 13:24:23,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:23,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:24:23,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:23,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:24:23,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:24:23,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 290 [2023-08-26 13:24:23,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 85 flow. Second operand has 6 states, 6 states have (on average 131.66666666666666) internal successors, (790), 6 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:23,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:23,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 290 [2023-08-26 13:24:23,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:24,227 INFO L124 PetriNetUnfolderBase]: 7775/10913 cut-off events. [2023-08-26 13:24:24,227 INFO L125 PetriNetUnfolderBase]: For 194/194 co-relation queries the response was YES. [2023-08-26 13:24:24,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22079 conditions, 10913 events. 7775/10913 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 53708 event pairs, 2164 based on Foata normal form. 1/10914 useless extension candidates. Maximal degree in co-relation 22075. Up to 5195 conditions per place. [2023-08-26 13:24:24,248 INFO L140 encePairwiseOnDemand]: 283/290 looper letters, 89 selfloop transitions, 12 changer transitions 13/114 dead transitions. [2023-08-26 13:24:24,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 114 transitions, 487 flow [2023-08-26 13:24:24,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:24:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:24:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 871 transitions. [2023-08-26 13:24:24,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5005747126436781 [2023-08-26 13:24:24,251 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 871 transitions. [2023-08-26 13:24:24,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 871 transitions. [2023-08-26 13:24:24,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:24,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 871 transitions. [2023-08-26 13:24:24,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 145.16666666666666) internal successors, (871), 6 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:24,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:24,256 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:24,256 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 85 flow. Second operand 6 states and 871 transitions. [2023-08-26 13:24:24,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 114 transitions, 487 flow [2023-08-26 13:24:24,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 114 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:24,259 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 164 flow [2023-08-26 13:24:24,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2023-08-26 13:24:24,260 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -7 predicate places. [2023-08-26 13:24:24,260 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 164 flow [2023-08-26 13:24:24,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 131.66666666666666) internal successors, (790), 6 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:24,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:24,261 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:24,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 13:24:24,261 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 13:24:24,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:24,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1665606325, now seen corresponding path program 2 times [2023-08-26 13:24:24,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:24,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099445773] [2023-08-26 13:24:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:24,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:24,470 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 13:24:24,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:24,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099445773] [2023-08-26 13:24:24,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099445773] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:24,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:24,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:24:24,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979508078] [2023-08-26 13:24:24,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:24,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:24:24,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:24,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:24:24,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:24:24,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:24,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 164 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:24,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:24,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:24,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:25,056 INFO L124 PetriNetUnfolderBase]: 4828/8104 cut-off events. [2023-08-26 13:24:25,056 INFO L125 PetriNetUnfolderBase]: For 691/719 co-relation queries the response was YES. [2023-08-26 13:24:25,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17001 conditions, 8104 events. 4828/8104 cut-off events. For 691/719 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 56029 event pairs, 556 based on Foata normal form. 32/7914 useless extension candidates. Maximal degree in co-relation 16994. Up to 2028 conditions per place. [2023-08-26 13:24:25,086 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 107 selfloop transitions, 47 changer transitions 0/172 dead transitions. [2023-08-26 13:24:25,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 172 transitions, 741 flow [2023-08-26 13:24:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 13:24:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 13:24:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1564 transitions. [2023-08-26 13:24:25,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490282131661442 [2023-08-26 13:24:25,090 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1564 transitions. [2023-08-26 13:24:25,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1564 transitions. [2023-08-26 13:24:25,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:25,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1564 transitions. [2023-08-26 13:24:25,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 142.1818181818182) internal successors, (1564), 11 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:25,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:25,096 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:25,096 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 164 flow. Second operand 11 states and 1564 transitions. [2023-08-26 13:24:25,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 172 transitions, 741 flow [2023-08-26 13:24:25,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 172 transitions, 735 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:25,103 INFO L231 Difference]: Finished difference. Result has 67 places, 98 transitions, 392 flow [2023-08-26 13:24:25,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=392, PETRI_PLACES=67, PETRI_TRANSITIONS=98} [2023-08-26 13:24:25,104 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2023-08-26 13:24:25,104 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 98 transitions, 392 flow [2023-08-26 13:24:25,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:25,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:25,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:25,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 13:24:25,105 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 13:24:25,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash -876230877, now seen corresponding path program 3 times [2023-08-26 13:24:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:25,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421774246] [2023-08-26 13:24:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:25,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:25,269 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 13:24:25,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:25,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421774246] [2023-08-26 13:24:25,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421774246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:25,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:25,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 13:24:25,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775661248] [2023-08-26 13:24:25,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:25,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:24:25,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:25,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:24:25,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:24:25,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:25,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 98 transitions, 392 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:25,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:25,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:25,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:25,782 INFO L124 PetriNetUnfolderBase]: 4597/7596 cut-off events. [2023-08-26 13:24:25,782 INFO L125 PetriNetUnfolderBase]: For 3270/3742 co-relation queries the response was YES. [2023-08-26 13:24:25,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19752 conditions, 7596 events. 4597/7596 cut-off events. For 3270/3742 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 50527 event pairs, 726 based on Foata normal form. 264/7666 useless extension candidates. Maximal degree in co-relation 19743. Up to 5116 conditions per place. [2023-08-26 13:24:25,810 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 112 selfloop transitions, 47 changer transitions 0/177 dead transitions. [2023-08-26 13:24:25,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 177 transitions, 953 flow [2023-08-26 13:24:25,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:24:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:24:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1268 transitions. [2023-08-26 13:24:25,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48582375478927203 [2023-08-26 13:24:25,813 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1268 transitions. [2023-08-26 13:24:25,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1268 transitions. [2023-08-26 13:24:25,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:25,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1268 transitions. [2023-08-26 13:24:25,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 140.88888888888889) internal successors, (1268), 9 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:25,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:25,818 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:25,818 INFO L175 Difference]: Start difference. First operand has 67 places, 98 transitions, 392 flow. Second operand 9 states and 1268 transitions. [2023-08-26 13:24:25,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 177 transitions, 953 flow [2023-08-26 13:24:25,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 177 transitions, 953 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:24:25,828 INFO L231 Difference]: Finished difference. Result has 79 places, 120 transitions, 653 flow [2023-08-26 13:24:25,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=653, PETRI_PLACES=79, PETRI_TRANSITIONS=120} [2023-08-26 13:24:25,829 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 16 predicate places. [2023-08-26 13:24:25,829 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 120 transitions, 653 flow [2023-08-26 13:24:25,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:25,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:25,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:25,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 13:24:25,830 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 13:24:25,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:25,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1927123061, now seen corresponding path program 4 times [2023-08-26 13:24:25,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:25,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575989360] [2023-08-26 13:24:25,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:25,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:24:25,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:25,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575989360] [2023-08-26 13:24:25,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575989360] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:25,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:25,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 13:24:25,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593471827] [2023-08-26 13:24:25,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:25,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:24:25,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:24:25,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:24:25,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:25,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 120 transitions, 653 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:25,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:25,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:25,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:26,781 INFO L124 PetriNetUnfolderBase]: 5961/9982 cut-off events. [2023-08-26 13:24:26,781 INFO L125 PetriNetUnfolderBase]: For 12404/13318 co-relation queries the response was YES. [2023-08-26 13:24:26,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30609 conditions, 9982 events. 5961/9982 cut-off events. For 12404/13318 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 70901 event pairs, 934 based on Foata normal form. 412/10126 useless extension candidates. Maximal degree in co-relation 30595. Up to 3197 conditions per place. [2023-08-26 13:24:26,846 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 118 selfloop transitions, 87 changer transitions 0/223 dead transitions. [2023-08-26 13:24:26,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 223 transitions, 1482 flow [2023-08-26 13:24:26,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:24:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:24:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1284 transitions. [2023-08-26 13:24:26,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49195402298850577 [2023-08-26 13:24:26,850 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1284 transitions. [2023-08-26 13:24:26,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1284 transitions. [2023-08-26 13:24:26,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:26,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1284 transitions. [2023-08-26 13:24:26,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 142.66666666666666) internal successors, (1284), 9 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:26,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:26,855 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:26,855 INFO L175 Difference]: Start difference. First operand has 79 places, 120 transitions, 653 flow. Second operand 9 states and 1284 transitions. [2023-08-26 13:24:26,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 223 transitions, 1482 flow [2023-08-26 13:24:26,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 223 transitions, 1443 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-26 13:24:26,884 INFO L231 Difference]: Finished difference. Result has 86 places, 156 transitions, 1157 flow [2023-08-26 13:24:26,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1157, PETRI_PLACES=86, PETRI_TRANSITIONS=156} [2023-08-26 13:24:26,885 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 23 predicate places. [2023-08-26 13:24:26,885 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 156 transitions, 1157 flow [2023-08-26 13:24:26,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:26,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:26,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:26,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 13:24:26,886 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 13:24:26,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:26,886 INFO L85 PathProgramCache]: Analyzing trace with hash 286951713, now seen corresponding path program 5 times [2023-08-26 13:24:26,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:26,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322730621] [2023-08-26 13:24:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:26,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:27,048 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 13:24:27,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:27,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322730621] [2023-08-26 13:24:27,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322730621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:27,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:27,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:24:27,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984596656] [2023-08-26 13:24:27,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:27,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:24:27,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:27,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:24:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:24:27,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:27,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 156 transitions, 1157 flow. Second operand has 6 states, 6 states have (on average 132.83333333333334) internal successors, (797), 6 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:27,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:27,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:27,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:27,744 INFO L124 PetriNetUnfolderBase]: 5335/9023 cut-off events. [2023-08-26 13:24:27,744 INFO L125 PetriNetUnfolderBase]: For 19486/20874 co-relation queries the response was YES. [2023-08-26 13:24:27,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31830 conditions, 9023 events. 5335/9023 cut-off events. For 19486/20874 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 62991 event pairs, 1495 based on Foata normal form. 542/9376 useless extension candidates. Maximal degree in co-relation 31814. Up to 6499 conditions per place. [2023-08-26 13:24:27,803 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 123 selfloop transitions, 57 changer transitions 8/206 dead transitions. [2023-08-26 13:24:27,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 206 transitions, 1742 flow [2023-08-26 13:24:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:24:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:24:27,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 990 transitions. [2023-08-26 13:24:27,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876847290640394 [2023-08-26 13:24:27,809 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 990 transitions. [2023-08-26 13:24:27,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 990 transitions. [2023-08-26 13:24:27,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:27,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 990 transitions. [2023-08-26 13:24:27,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 141.42857142857142) internal successors, (990), 7 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:27,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:27,813 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:27,813 INFO L175 Difference]: Start difference. First operand has 86 places, 156 transitions, 1157 flow. Second operand 7 states and 990 transitions. [2023-08-26 13:24:27,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 206 transitions, 1742 flow [2023-08-26 13:24:27,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 206 transitions, 1705 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-26 13:24:27,850 INFO L231 Difference]: Finished difference. Result has 93 places, 156 transitions, 1303 flow [2023-08-26 13:24:27,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1303, PETRI_PLACES=93, PETRI_TRANSITIONS=156} [2023-08-26 13:24:27,851 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 30 predicate places. [2023-08-26 13:24:27,851 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 156 transitions, 1303 flow [2023-08-26 13:24:27,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 132.83333333333334) internal successors, (797), 6 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:27,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:27,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:27,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 13:24:27,852 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 13:24:27,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:27,852 INFO L85 PathProgramCache]: Analyzing trace with hash 599718469, now seen corresponding path program 6 times [2023-08-26 13:24:27,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:27,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674445104] [2023-08-26 13:24:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:27,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:28,029 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 13:24:28,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:28,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674445104] [2023-08-26 13:24:28,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674445104] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:28,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:28,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:24:28,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319852522] [2023-08-26 13:24:28,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:28,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:24:28,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:28,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:24:28,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:24:28,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:28,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 156 transitions, 1303 flow. Second operand has 6 states, 6 states have (on average 132.83333333333334) internal successors, (797), 6 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:28,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:28,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:28,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:28,637 INFO L124 PetriNetUnfolderBase]: 4692/8040 cut-off events. [2023-08-26 13:24:28,637 INFO L125 PetriNetUnfolderBase]: For 17715/18843 co-relation queries the response was YES. [2023-08-26 13:24:28,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28945 conditions, 8040 events. 4692/8040 cut-off events. For 17715/18843 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 56120 event pairs, 1383 based on Foata normal form. 398/8229 useless extension candidates. Maximal degree in co-relation 28925. Up to 6063 conditions per place. [2023-08-26 13:24:28,674 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 106 selfloop transitions, 48 changer transitions 18/190 dead transitions. [2023-08-26 13:24:28,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 190 transitions, 1727 flow [2023-08-26 13:24:28,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:24:28,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:24:28,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 980 transitions. [2023-08-26 13:24:28,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2023-08-26 13:24:28,676 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 980 transitions. [2023-08-26 13:24:28,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 980 transitions. [2023-08-26 13:24:28,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:28,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 980 transitions. [2023-08-26 13:24:28,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 140.0) internal successors, (980), 7 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:28,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:28,680 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:28,680 INFO L175 Difference]: Start difference. First operand has 93 places, 156 transitions, 1303 flow. Second operand 7 states and 980 transitions. [2023-08-26 13:24:28,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 190 transitions, 1727 flow [2023-08-26 13:24:28,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 190 transitions, 1676 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-26 13:24:28,698 INFO L231 Difference]: Finished difference. Result has 98 places, 145 transitions, 1304 flow [2023-08-26 13:24:28,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1304, PETRI_PLACES=98, PETRI_TRANSITIONS=145} [2023-08-26 13:24:28,698 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 35 predicate places. [2023-08-26 13:24:28,698 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 145 transitions, 1304 flow [2023-08-26 13:24:28,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 132.83333333333334) internal successors, (797), 6 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:28,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:28,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:28,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 13:24:28,699 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 13:24:28,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:28,699 INFO L85 PathProgramCache]: Analyzing trace with hash 244313207, now seen corresponding path program 7 times [2023-08-26 13:24:28,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:28,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375169574] [2023-08-26 13:24:28,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:28,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:28,821 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 13:24:28,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:28,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375169574] [2023-08-26 13:24:28,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375169574] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:28,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:28,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:24:28,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452427436] [2023-08-26 13:24:28,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:28,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:24:28,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:28,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:24:28,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:24:28,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:28,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 145 transitions, 1304 flow. Second operand has 6 states, 6 states have (on average 132.83333333333334) internal successors, (797), 6 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:28,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:28,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:28,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:29,352 INFO L124 PetriNetUnfolderBase]: 4118/7262 cut-off events. [2023-08-26 13:24:29,352 INFO L125 PetriNetUnfolderBase]: For 17669/18287 co-relation queries the response was YES. [2023-08-26 13:24:29,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26465 conditions, 7262 events. 4118/7262 cut-off events. For 17669/18287 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 51638 event pairs, 1346 based on Foata normal form. 176/7261 useless extension candidates. Maximal degree in co-relation 26443. Up to 5881 conditions per place. [2023-08-26 13:24:29,382 INFO L140 encePairwiseOnDemand]: 283/290 looper letters, 133 selfloop transitions, 20 changer transitions 0/170 dead transitions. [2023-08-26 13:24:29,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 170 transitions, 1726 flow [2023-08-26 13:24:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:24:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:24:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 697 transitions. [2023-08-26 13:24:29,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806896551724138 [2023-08-26 13:24:29,384 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 697 transitions. [2023-08-26 13:24:29,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 697 transitions. [2023-08-26 13:24:29,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:29,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 697 transitions. [2023-08-26 13:24:29,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.4) internal successors, (697), 5 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:29,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 290.0) internal successors, (1740), 6 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:29,388 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 290.0) internal successors, (1740), 6 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:29,388 INFO L175 Difference]: Start difference. First operand has 98 places, 145 transitions, 1304 flow. Second operand 5 states and 697 transitions. [2023-08-26 13:24:29,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 170 transitions, 1726 flow [2023-08-26 13:24:29,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 170 transitions, 1672 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-26 13:24:29,410 INFO L231 Difference]: Finished difference. Result has 88 places, 145 transitions, 1307 flow [2023-08-26 13:24:29,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1307, PETRI_PLACES=88, PETRI_TRANSITIONS=145} [2023-08-26 13:24:29,410 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-08-26 13:24:29,410 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 145 transitions, 1307 flow [2023-08-26 13:24:29,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 132.83333333333334) internal successors, (797), 6 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:29,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:29,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:29,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 13:24:29,411 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 13:24:29,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:29,411 INFO L85 PathProgramCache]: Analyzing trace with hash -359909413, now seen corresponding path program 8 times [2023-08-26 13:24:29,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:29,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183328964] [2023-08-26 13:24:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:29,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:29,550 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 13:24:29,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:29,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183328964] [2023-08-26 13:24:29,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183328964] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:29,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:29,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 13:24:29,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264341832] [2023-08-26 13:24:29,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:29,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:24:29,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:29,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:24:29,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:24:29,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:29,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 145 transitions, 1307 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:29,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:29,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:29,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:30,215 INFO L124 PetriNetUnfolderBase]: 4053/7215 cut-off events. [2023-08-26 13:24:30,215 INFO L125 PetriNetUnfolderBase]: For 15543/16570 co-relation queries the response was YES. [2023-08-26 13:24:30,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25524 conditions, 7215 events. 4053/7215 cut-off events. For 15543/16570 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 51807 event pairs, 705 based on Foata normal form. 586/7618 useless extension candidates. Maximal degree in co-relation 25503. Up to 2919 conditions per place. [2023-08-26 13:24:30,248 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 112 selfloop transitions, 88 changer transitions 1/218 dead transitions. [2023-08-26 13:24:30,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 218 transitions, 2053 flow [2023-08-26 13:24:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:24:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:24:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1271 transitions. [2023-08-26 13:24:30,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869731800766284 [2023-08-26 13:24:30,251 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1271 transitions. [2023-08-26 13:24:30,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1271 transitions. [2023-08-26 13:24:30,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:30,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1271 transitions. [2023-08-26 13:24:30,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 141.22222222222223) internal successors, (1271), 9 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:30,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:30,259 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:30,259 INFO L175 Difference]: Start difference. First operand has 88 places, 145 transitions, 1307 flow. Second operand 9 states and 1271 transitions. [2023-08-26 13:24:30,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 218 transitions, 2053 flow [2023-08-26 13:24:30,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 218 transitions, 2033 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 13:24:30,280 INFO L231 Difference]: Finished difference. Result has 95 places, 155 transitions, 1580 flow [2023-08-26 13:24:30,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1580, PETRI_PLACES=95, PETRI_TRANSITIONS=155} [2023-08-26 13:24:30,281 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 32 predicate places. [2023-08-26 13:24:30,281 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 155 transitions, 1580 flow [2023-08-26 13:24:30,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:30,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:30,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:30,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 13:24:30,281 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 13:24:30,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:30,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1430309173, now seen corresponding path program 9 times [2023-08-26 13:24:30,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:30,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719037981] [2023-08-26 13:24:30,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:30,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:30,518 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 13:24:30,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:30,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719037981] [2023-08-26 13:24:30,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719037981] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:30,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:30,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:24:30,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995072320] [2023-08-26 13:24:30,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:30,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:24:30,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:30,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:24:30,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:24:30,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:30,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 155 transitions, 1580 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:30,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:30,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:30,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:31,329 INFO L124 PetriNetUnfolderBase]: 4218/7543 cut-off events. [2023-08-26 13:24:31,329 INFO L125 PetriNetUnfolderBase]: For 24036/24924 co-relation queries the response was YES. [2023-08-26 13:24:31,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28951 conditions, 7543 events. 4218/7543 cut-off events. For 24036/24924 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 54790 event pairs, 1182 based on Foata normal form. 400/7765 useless extension candidates. Maximal degree in co-relation 28929. Up to 5547 conditions per place. [2023-08-26 13:24:31,366 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 147 selfloop transitions, 59 changer transitions 4/227 dead transitions. [2023-08-26 13:24:31,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 227 transitions, 2362 flow [2023-08-26 13:24:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 13:24:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 13:24:31,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1660 transitions. [2023-08-26 13:24:31,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47701149425287354 [2023-08-26 13:24:31,370 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1660 transitions. [2023-08-26 13:24:31,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1660 transitions. [2023-08-26 13:24:31,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:31,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1660 transitions. [2023-08-26 13:24:31,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 138.33333333333334) internal successors, (1660), 12 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:31,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:31,377 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:31,378 INFO L175 Difference]: Start difference. First operand has 95 places, 155 transitions, 1580 flow. Second operand 12 states and 1660 transitions. [2023-08-26 13:24:31,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 227 transitions, 2362 flow [2023-08-26 13:24:31,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 227 transitions, 2248 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-26 13:24:31,406 INFO L231 Difference]: Finished difference. Result has 104 places, 162 transitions, 1680 flow [2023-08-26 13:24:31,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1680, PETRI_PLACES=104, PETRI_TRANSITIONS=162} [2023-08-26 13:24:31,407 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 41 predicate places. [2023-08-26 13:24:31,407 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 162 transitions, 1680 flow [2023-08-26 13:24:31,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:31,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:31,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:31,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 13:24:31,408 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 13:24:31,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:31,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2102463787, now seen corresponding path program 10 times [2023-08-26 13:24:31,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:31,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747241900] [2023-08-26 13:24:31,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:31,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:31,544 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 13:24:31,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:31,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747241900] [2023-08-26 13:24:31,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747241900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:31,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:31,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 13:24:31,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775221165] [2023-08-26 13:24:31,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:31,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:24:31,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:31,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:24:31,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:24:31,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:31,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 162 transitions, 1680 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:31,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:31,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:31,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:32,224 INFO L124 PetriNetUnfolderBase]: 4171/7563 cut-off events. [2023-08-26 13:24:32,224 INFO L125 PetriNetUnfolderBase]: For 24872/26006 co-relation queries the response was YES. [2023-08-26 13:24:32,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28698 conditions, 7563 events. 4171/7563 cut-off events. For 24872/26006 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 56189 event pairs, 644 based on Foata normal form. 680/8037 useless extension candidates. Maximal degree in co-relation 28675. Up to 2943 conditions per place. [2023-08-26 13:24:32,257 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 112 selfloop transitions, 98 changer transitions 6/233 dead transitions. [2023-08-26 13:24:32,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 233 transitions, 2423 flow [2023-08-26 13:24:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:24:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:24:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1275 transitions. [2023-08-26 13:24:32,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4885057471264368 [2023-08-26 13:24:32,260 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1275 transitions. [2023-08-26 13:24:32,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1275 transitions. [2023-08-26 13:24:32,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:32,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1275 transitions. [2023-08-26 13:24:32,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 141.66666666666666) internal successors, (1275), 9 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:32,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:32,265 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:32,265 INFO L175 Difference]: Start difference. First operand has 104 places, 162 transitions, 1680 flow. Second operand 9 states and 1275 transitions. [2023-08-26 13:24:32,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 233 transitions, 2423 flow [2023-08-26 13:24:32,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 233 transitions, 2302 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-08-26 13:24:32,298 INFO L231 Difference]: Finished difference. Result has 107 places, 167 transitions, 1830 flow [2023-08-26 13:24:32,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1830, PETRI_PLACES=107, PETRI_TRANSITIONS=167} [2023-08-26 13:24:32,299 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 44 predicate places. [2023-08-26 13:24:32,299 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 167 transitions, 1830 flow [2023-08-26 13:24:32,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:32,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:32,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:32,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 13:24:32,299 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 13:24:32,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:32,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1046748397, now seen corresponding path program 11 times [2023-08-26 13:24:32,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:32,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348987385] [2023-08-26 13:24:32,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:32,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:32,467 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 13:24:32,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:32,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348987385] [2023-08-26 13:24:32,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348987385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:32,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:32,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:24:32,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446893946] [2023-08-26 13:24:32,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:32,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:24:32,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:32,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:24:32,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:24:32,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:32,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 167 transitions, 1830 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:32,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:32,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:32,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:33,173 INFO L124 PetriNetUnfolderBase]: 4133/7467 cut-off events. [2023-08-26 13:24:33,173 INFO L125 PetriNetUnfolderBase]: For 32153/33170 co-relation queries the response was YES. [2023-08-26 13:24:33,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30369 conditions, 7467 events. 4133/7467 cut-off events. For 32153/33170 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 54997 event pairs, 1140 based on Foata normal form. 426/7722 useless extension candidates. Maximal degree in co-relation 30345. Up to 5446 conditions per place. [2023-08-26 13:24:33,211 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 151 selfloop transitions, 60 changer transitions 9/237 dead transitions. [2023-08-26 13:24:33,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 237 transitions, 2750 flow [2023-08-26 13:24:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 13:24:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 13:24:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1654 transitions. [2023-08-26 13:24:33,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4752873563218391 [2023-08-26 13:24:33,214 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1654 transitions. [2023-08-26 13:24:33,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1654 transitions. [2023-08-26 13:24:33,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:33,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1654 transitions. [2023-08-26 13:24:33,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 137.83333333333334) internal successors, (1654), 12 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:33,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:33,219 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:33,219 INFO L175 Difference]: Start difference. First operand has 107 places, 167 transitions, 1830 flow. Second operand 12 states and 1654 transitions. [2023-08-26 13:24:33,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 237 transitions, 2750 flow [2023-08-26 13:24:33,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 237 transitions, 2592 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-26 13:24:33,258 INFO L231 Difference]: Finished difference. Result has 113 places, 175 transitions, 1943 flow [2023-08-26 13:24:33,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1943, PETRI_PLACES=113, PETRI_TRANSITIONS=175} [2023-08-26 13:24:33,258 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 50 predicate places. [2023-08-26 13:24:33,258 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 175 transitions, 1943 flow [2023-08-26 13:24:33,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:33,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:33,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:33,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 13:24:33,259 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 13:24:33,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:33,259 INFO L85 PathProgramCache]: Analyzing trace with hash 240451193, now seen corresponding path program 12 times [2023-08-26 13:24:33,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:33,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994603908] [2023-08-26 13:24:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:33,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:33,377 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 13:24:33,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:33,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994603908] [2023-08-26 13:24:33,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994603908] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:33,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:33,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:24:33,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813441430] [2023-08-26 13:24:33,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:33,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:24:33,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:33,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:24:33,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:24:33,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:33,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 175 transitions, 1943 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:33,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:33,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:33,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:33,892 INFO L124 PetriNetUnfolderBase]: 2280/4405 cut-off events. [2023-08-26 13:24:33,893 INFO L125 PetriNetUnfolderBase]: For 15245/16271 co-relation queries the response was YES. [2023-08-26 13:24:33,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17078 conditions, 4405 events. 2280/4405 cut-off events. For 15245/16271 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 31159 event pairs, 500 based on Foata normal form. 764/5075 useless extension candidates. Maximal degree in co-relation 17053. Up to 1980 conditions per place. [2023-08-26 13:24:33,913 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 120 selfloop transitions, 115 changer transitions 13/262 dead transitions. [2023-08-26 13:24:33,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 262 transitions, 2989 flow [2023-08-26 13:24:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 13:24:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 13:24:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1546 transitions. [2023-08-26 13:24:33,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846394984326019 [2023-08-26 13:24:33,916 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1546 transitions. [2023-08-26 13:24:33,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1546 transitions. [2023-08-26 13:24:33,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:33,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1546 transitions. [2023-08-26 13:24:33,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 140.54545454545453) internal successors, (1546), 11 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:33,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:33,922 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:33,922 INFO L175 Difference]: Start difference. First operand has 113 places, 175 transitions, 1943 flow. Second operand 11 states and 1546 transitions. [2023-08-26 13:24:33,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 262 transitions, 2989 flow [2023-08-26 13:24:33,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 262 transitions, 2837 flow, removed 9 selfloop flow, removed 11 redundant places. [2023-08-26 13:24:33,945 INFO L231 Difference]: Finished difference. Result has 114 places, 182 transitions, 2174 flow [2023-08-26 13:24:33,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1573, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2174, PETRI_PLACES=114, PETRI_TRANSITIONS=182} [2023-08-26 13:24:33,945 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 51 predicate places. [2023-08-26 13:24:33,945 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 182 transitions, 2174 flow [2023-08-26 13:24:33,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:33,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:33,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:33,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 13:24:33,946 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 13:24:33,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:33,946 INFO L85 PathProgramCache]: Analyzing trace with hash 656090593, now seen corresponding path program 13 times [2023-08-26 13:24:33,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:33,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076630944] [2023-08-26 13:24:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:33,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:34,080 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 13:24:34,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:34,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076630944] [2023-08-26 13:24:34,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076630944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:34,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:34,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:24:34,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87557794] [2023-08-26 13:24:34,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:34,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:24:34,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:34,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:24:34,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:24:34,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:34,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 182 transitions, 2174 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:34,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:34,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:34,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:34,639 INFO L124 PetriNetUnfolderBase]: 2464/4875 cut-off events. [2023-08-26 13:24:34,640 INFO L125 PetriNetUnfolderBase]: For 18877/19825 co-relation queries the response was YES. [2023-08-26 13:24:34,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19597 conditions, 4875 events. 2464/4875 cut-off events. For 18877/19825 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 35804 event pairs, 179 based on Foata normal form. 412/5189 useless extension candidates. Maximal degree in co-relation 19570. Up to 1454 conditions per place. [2023-08-26 13:24:34,662 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 114 selfloop transitions, 152 changer transitions 2/282 dead transitions. [2023-08-26 13:24:34,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 282 transitions, 3128 flow [2023-08-26 13:24:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 13:24:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 13:24:34,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1416 transitions. [2023-08-26 13:24:34,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882758620689655 [2023-08-26 13:24:34,664 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1416 transitions. [2023-08-26 13:24:34,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1416 transitions. [2023-08-26 13:24:34,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:34,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1416 transitions. [2023-08-26 13:24:34,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.6) internal successors, (1416), 10 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:34,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:34,668 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:34,668 INFO L175 Difference]: Start difference. First operand has 114 places, 182 transitions, 2174 flow. Second operand 10 states and 1416 transitions. [2023-08-26 13:24:34,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 282 transitions, 3128 flow [2023-08-26 13:24:34,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 282 transitions, 2947 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-08-26 13:24:34,703 INFO L231 Difference]: Finished difference. Result has 119 places, 206 transitions, 2635 flow [2023-08-26 13:24:34,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2635, PETRI_PLACES=119, PETRI_TRANSITIONS=206} [2023-08-26 13:24:34,704 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 56 predicate places. [2023-08-26 13:24:34,704 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 206 transitions, 2635 flow [2023-08-26 13:24:34,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:34,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:34,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:34,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 13:24:34,704 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 13:24:34,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:34,704 INFO L85 PathProgramCache]: Analyzing trace with hash -856563731, now seen corresponding path program 14 times [2023-08-26 13:24:34,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:34,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837728077] [2023-08-26 13:24:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:34,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:34,836 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 13:24:34,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:34,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837728077] [2023-08-26 13:24:34,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837728077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:34,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:34,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 13:24:34,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393007385] [2023-08-26 13:24:34,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:34,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:24:34,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:34,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:24:34,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:24:34,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:34,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 206 transitions, 2635 flow. Second operand has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:34,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:34,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:34,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:35,527 INFO L124 PetriNetUnfolderBase]: 2436/4853 cut-off events. [2023-08-26 13:24:35,527 INFO L125 PetriNetUnfolderBase]: For 28001/28985 co-relation queries the response was YES. [2023-08-26 13:24:35,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22173 conditions, 4853 events. 2436/4853 cut-off events. For 28001/28985 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 35819 event pairs, 396 based on Foata normal form. 296/5055 useless extension candidates. Maximal degree in co-relation 22144. Up to 1941 conditions per place. [2023-08-26 13:24:35,548 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 130 selfloop transitions, 142 changer transitions 5/291 dead transitions. [2023-08-26 13:24:35,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 291 transitions, 3667 flow [2023-08-26 13:24:35,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 13:24:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 13:24:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2076 transitions. [2023-08-26 13:24:35,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772413793103448 [2023-08-26 13:24:35,550 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2076 transitions. [2023-08-26 13:24:35,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2076 transitions. [2023-08-26 13:24:35,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:35,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2076 transitions. [2023-08-26 13:24:35,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 138.4) internal successors, (2076), 15 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:35,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 290.0) internal successors, (4640), 16 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:35,556 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 290.0) internal successors, (4640), 16 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:35,556 INFO L175 Difference]: Start difference. First operand has 119 places, 206 transitions, 2635 flow. Second operand 15 states and 2076 transitions. [2023-08-26 13:24:35,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 291 transitions, 3667 flow [2023-08-26 13:24:35,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 291 transitions, 3595 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-26 13:24:35,614 INFO L231 Difference]: Finished difference. Result has 129 places, 213 transitions, 2943 flow [2023-08-26 13:24:35,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2571, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2943, PETRI_PLACES=129, PETRI_TRANSITIONS=213} [2023-08-26 13:24:35,614 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 66 predicate places. [2023-08-26 13:24:35,614 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 213 transitions, 2943 flow [2023-08-26 13:24:35,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:35,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:35,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:35,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 13:24:35,615 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 13:24:35,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:35,615 INFO L85 PathProgramCache]: Analyzing trace with hash -256423549, now seen corresponding path program 15 times [2023-08-26 13:24:35,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:35,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313921658] [2023-08-26 13:24:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:35,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:35,750 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 13:24:35,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:35,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313921658] [2023-08-26 13:24:35,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313921658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:35,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:35,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:24:35,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496674] [2023-08-26 13:24:35,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:35,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:24:35,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:35,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:24:35,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:24:35,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:35,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 213 transitions, 2943 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:35,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:35,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:35,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:36,292 INFO L124 PetriNetUnfolderBase]: 2294/4593 cut-off events. [2023-08-26 13:24:36,292 INFO L125 PetriNetUnfolderBase]: For 30800/31884 co-relation queries the response was YES. [2023-08-26 13:24:36,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22112 conditions, 4593 events. 2294/4593 cut-off events. For 30800/31884 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 33812 event pairs, 178 based on Foata normal form. 486/5020 useless extension candidates. Maximal degree in co-relation 22082. Up to 1332 conditions per place. [2023-08-26 13:24:36,316 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 116 selfloop transitions, 162 changer transitions 5/297 dead transitions. [2023-08-26 13:24:36,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 297 transitions, 3979 flow [2023-08-26 13:24:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 13:24:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 13:24:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1417 transitions. [2023-08-26 13:24:36,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4886206896551724 [2023-08-26 13:24:36,317 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1417 transitions. [2023-08-26 13:24:36,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1417 transitions. [2023-08-26 13:24:36,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:36,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1417 transitions. [2023-08-26 13:24:36,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.7) internal successors, (1417), 10 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:36,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:36,322 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:36,322 INFO L175 Difference]: Start difference. First operand has 129 places, 213 transitions, 2943 flow. Second operand 10 states and 1417 transitions. [2023-08-26 13:24:36,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 297 transitions, 3979 flow [2023-08-26 13:24:36,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 297 transitions, 3747 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-26 13:24:36,390 INFO L231 Difference]: Finished difference. Result has 132 places, 219 transitions, 3149 flow [2023-08-26 13:24:36,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3149, PETRI_PLACES=132, PETRI_TRANSITIONS=219} [2023-08-26 13:24:36,391 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 69 predicate places. [2023-08-26 13:24:36,391 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 219 transitions, 3149 flow [2023-08-26 13:24:36,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:36,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:36,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:36,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 13:24:36,392 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 13:24:36,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:36,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1893969183, now seen corresponding path program 16 times [2023-08-26 13:24:36,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:36,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691450303] [2023-08-26 13:24:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:36,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:36,560 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 13:24:36,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:36,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691450303] [2023-08-26 13:24:36,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691450303] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:36,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:36,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 13:24:36,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288379373] [2023-08-26 13:24:36,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:36,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:24:36,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:36,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:24:36,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:24:36,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:36,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 219 transitions, 3149 flow. Second operand has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:36,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:36,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:36,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:37,357 INFO L124 PetriNetUnfolderBase]: 2227/4526 cut-off events. [2023-08-26 13:24:37,357 INFO L125 PetriNetUnfolderBase]: For 34606/35416 co-relation queries the response was YES. [2023-08-26 13:24:37,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22721 conditions, 4526 events. 2227/4526 cut-off events. For 34606/35416 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 33630 event pairs, 372 based on Foata normal form. 226/4687 useless extension candidates. Maximal degree in co-relation 22690. Up to 1750 conditions per place. [2023-08-26 13:24:37,380 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 138 selfloop transitions, 143 changer transitions 15/310 dead transitions. [2023-08-26 13:24:37,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 310 transitions, 4247 flow [2023-08-26 13:24:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 13:24:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 13:24:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2605 transitions. [2023-08-26 13:24:37,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727767695099819 [2023-08-26 13:24:37,383 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2605 transitions. [2023-08-26 13:24:37,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2605 transitions. [2023-08-26 13:24:37,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:37,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2605 transitions. [2023-08-26 13:24:37,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 137.10526315789474) internal successors, (2605), 19 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:37,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:37,390 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:37,390 INFO L175 Difference]: Start difference. First operand has 132 places, 219 transitions, 3149 flow. Second operand 19 states and 2605 transitions. [2023-08-26 13:24:37,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 310 transitions, 4247 flow [2023-08-26 13:24:37,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 310 transitions, 3976 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-08-26 13:24:37,457 INFO L231 Difference]: Finished difference. Result has 143 places, 218 transitions, 3175 flow [2023-08-26 13:24:37,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3175, PETRI_PLACES=143, PETRI_TRANSITIONS=218} [2023-08-26 13:24:37,457 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 80 predicate places. [2023-08-26 13:24:37,457 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 218 transitions, 3175 flow [2023-08-26 13:24:37,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:37,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:37,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:37,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 13:24:37,458 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 13:24:37,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:37,458 INFO L85 PathProgramCache]: Analyzing trace with hash 561616531, now seen corresponding path program 17 times [2023-08-26 13:24:37,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:37,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002459975] [2023-08-26 13:24:37,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:37,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:37,647 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 13:24:37,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:37,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002459975] [2023-08-26 13:24:37,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002459975] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:37,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:37,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 13:24:37,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008270658] [2023-08-26 13:24:37,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:37,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:24:37,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:37,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:24:37,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:24:37,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:37,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 218 transitions, 3175 flow. Second operand has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:37,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:37,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:37,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:38,422 INFO L124 PetriNetUnfolderBase]: 2249/4575 cut-off events. [2023-08-26 13:24:38,422 INFO L125 PetriNetUnfolderBase]: For 36235/37043 co-relation queries the response was YES. [2023-08-26 13:24:38,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22875 conditions, 4575 events. 2249/4575 cut-off events. For 36235/37043 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 34120 event pairs, 572 based on Foata normal form. 120/4641 useless extension candidates. Maximal degree in co-relation 22844. Up to 3244 conditions per place. [2023-08-26 13:24:38,448 INFO L140 encePairwiseOnDemand]: 281/290 looper letters, 190 selfloop transitions, 62 changer transitions 31/297 dead transitions. [2023-08-26 13:24:38,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 297 transitions, 4363 flow [2023-08-26 13:24:38,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 13:24:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 13:24:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2321 transitions. [2023-08-26 13:24:38,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47079107505070994 [2023-08-26 13:24:38,451 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2321 transitions. [2023-08-26 13:24:38,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2321 transitions. [2023-08-26 13:24:38,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:38,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2321 transitions. [2023-08-26 13:24:38,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 136.52941176470588) internal successors, (2321), 17 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:38,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:38,456 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:38,456 INFO L175 Difference]: Start difference. First operand has 143 places, 218 transitions, 3175 flow. Second operand 17 states and 2321 transitions. [2023-08-26 13:24:38,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 297 transitions, 4363 flow [2023-08-26 13:24:38,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 297 transitions, 4036 flow, removed 2 selfloop flow, removed 14 redundant places. [2023-08-26 13:24:38,528 INFO L231 Difference]: Finished difference. Result has 143 places, 215 transitions, 2976 flow [2023-08-26 13:24:38,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2883, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2976, PETRI_PLACES=143, PETRI_TRANSITIONS=215} [2023-08-26 13:24:38,528 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 80 predicate places. [2023-08-26 13:24:38,528 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 215 transitions, 2976 flow [2023-08-26 13:24:38,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:38,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:38,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:38,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-26 13:24:38,529 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 13:24:38,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:38,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1710467467, now seen corresponding path program 18 times [2023-08-26 13:24:38,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:38,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544628320] [2023-08-26 13:24:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:38,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:38,693 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 13:24:38,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:38,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544628320] [2023-08-26 13:24:38,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544628320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:38,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:38,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 13:24:38,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172960960] [2023-08-26 13:24:38,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:38,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:24:38,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:38,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:24:38,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:24:38,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 290 [2023-08-26 13:24:38,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 215 transitions, 2976 flow. Second operand has 9 states, 9 states have (on average 121.77777777777777) internal successors, (1096), 9 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:38,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:38,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 290 [2023-08-26 13:24:38,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:39,517 INFO L124 PetriNetUnfolderBase]: 3828/6623 cut-off events. [2023-08-26 13:24:39,518 INFO L125 PetriNetUnfolderBase]: For 40051/40051 co-relation queries the response was YES. [2023-08-26 13:24:39,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31828 conditions, 6623 events. 3828/6623 cut-off events. For 40051/40051 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 42711 event pairs, 760 based on Foata normal form. 36/6659 useless extension candidates. Maximal degree in co-relation 31796. Up to 2939 conditions per place. [2023-08-26 13:24:39,550 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 169 selfloop transitions, 120 changer transitions 49/338 dead transitions. [2023-08-26 13:24:39,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 338 transitions, 4334 flow [2023-08-26 13:24:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 13:24:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 13:24:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1712 transitions. [2023-08-26 13:24:39,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45411140583554377 [2023-08-26 13:24:39,552 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1712 transitions. [2023-08-26 13:24:39,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1712 transitions. [2023-08-26 13:24:39,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:39,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1712 transitions. [2023-08-26 13:24:39,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 131.69230769230768) internal successors, (1712), 13 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:39,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 290.0) internal successors, (4060), 14 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:39,556 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 290.0) internal successors, (4060), 14 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:39,556 INFO L175 Difference]: Start difference. First operand has 143 places, 215 transitions, 2976 flow. Second operand 13 states and 1712 transitions. [2023-08-26 13:24:39,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 338 transitions, 4334 flow [2023-08-26 13:24:39,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 338 transitions, 4214 flow, removed 14 selfloop flow, removed 10 redundant places. [2023-08-26 13:24:39,654 INFO L231 Difference]: Finished difference. Result has 143 places, 194 transitions, 2768 flow [2023-08-26 13:24:39,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2862, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2768, PETRI_PLACES=143, PETRI_TRANSITIONS=194} [2023-08-26 13:24:39,654 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 80 predicate places. [2023-08-26 13:24:39,654 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 194 transitions, 2768 flow [2023-08-26 13:24:39,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 121.77777777777777) internal successors, (1096), 9 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:39,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:39,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:39,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 13:24:39,655 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 13:24:39,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:39,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1167770817, now seen corresponding path program 19 times [2023-08-26 13:24:39,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:39,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889121526] [2023-08-26 13:24:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:39,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:39,792 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 13:24:39,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:39,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889121526] [2023-08-26 13:24:39,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889121526] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:39,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:39,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 13:24:39,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719736458] [2023-08-26 13:24:39,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:39,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:24:39,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:39,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:24:39,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:24:39,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:39,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 194 transitions, 2768 flow. Second operand has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:39,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:39,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:39,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:40,412 INFO L124 PetriNetUnfolderBase]: 1979/4087 cut-off events. [2023-08-26 13:24:40,412 INFO L125 PetriNetUnfolderBase]: For 34787/35571 co-relation queries the response was YES. [2023-08-26 13:24:40,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20346 conditions, 4087 events. 1979/4087 cut-off events. For 34787/35571 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 30330 event pairs, 360 based on Foata normal form. 252/4284 useless extension candidates. Maximal degree in co-relation 20314. Up to 1734 conditions per place. [2023-08-26 13:24:40,432 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 124 selfloop transitions, 118 changer transitions 21/277 dead transitions. [2023-08-26 13:24:40,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 277 transitions, 3851 flow [2023-08-26 13:24:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 13:24:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 13:24:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2201 transitions. [2023-08-26 13:24:40,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435344827586207 [2023-08-26 13:24:40,434 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2201 transitions. [2023-08-26 13:24:40,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2201 transitions. [2023-08-26 13:24:40,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:40,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2201 transitions. [2023-08-26 13:24:40,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 137.5625) internal successors, (2201), 16 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:40,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 290.0) internal successors, (4930), 17 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:40,438 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 290.0) internal successors, (4930), 17 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:40,438 INFO L175 Difference]: Start difference. First operand has 143 places, 194 transitions, 2768 flow. Second operand 16 states and 2201 transitions. [2023-08-26 13:24:40,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 277 transitions, 3851 flow [2023-08-26 13:24:40,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 277 transitions, 3717 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-08-26 13:24:40,493 INFO L231 Difference]: Finished difference. Result has 148 places, 190 transitions, 2791 flow [2023-08-26 13:24:40,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2637, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2791, PETRI_PLACES=148, PETRI_TRANSITIONS=190} [2023-08-26 13:24:40,493 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 85 predicate places. [2023-08-26 13:24:40,493 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 190 transitions, 2791 flow [2023-08-26 13:24:40,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:40,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:40,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:40,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 13:24:40,494 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 13:24:40,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:40,494 INFO L85 PathProgramCache]: Analyzing trace with hash -825046407, now seen corresponding path program 20 times [2023-08-26 13:24:40,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:40,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363843084] [2023-08-26 13:24:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:40,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:40,609 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 13:24:40,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:40,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363843084] [2023-08-26 13:24:40,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363843084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:40,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:40,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 13:24:40,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462185201] [2023-08-26 13:24:40,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:40,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:24:40,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:40,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:24:40,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:24:40,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:40,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 190 transitions, 2791 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:40,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:40,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:40,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:41,037 INFO L124 PetriNetUnfolderBase]: 1795/3892 cut-off events. [2023-08-26 13:24:41,037 INFO L125 PetriNetUnfolderBase]: For 40284/40616 co-relation queries the response was YES. [2023-08-26 13:24:41,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19919 conditions, 3892 events. 1795/3892 cut-off events. For 40284/40616 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29636 event pairs, 314 based on Foata normal form. 186/4042 useless extension candidates. Maximal degree in co-relation 19885. Up to 1078 conditions per place. [2023-08-26 13:24:41,057 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 119 selfloop transitions, 119 changer transitions 11/262 dead transitions. [2023-08-26 13:24:41,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 262 transitions, 3736 flow [2023-08-26 13:24:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:24:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:24:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 994 transitions. [2023-08-26 13:24:41,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896551724137931 [2023-08-26 13:24:41,059 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 994 transitions. [2023-08-26 13:24:41,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 994 transitions. [2023-08-26 13:24:41,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:41,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 994 transitions. [2023-08-26 13:24:41,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:41,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:41,061 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:41,061 INFO L175 Difference]: Start difference. First operand has 148 places, 190 transitions, 2791 flow. Second operand 7 states and 994 transitions. [2023-08-26 13:24:41,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 262 transitions, 3736 flow [2023-08-26 13:24:41,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 262 transitions, 3672 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-08-26 13:24:41,117 INFO L231 Difference]: Finished difference. Result has 145 places, 210 transitions, 3383 flow [2023-08-26 13:24:41,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3383, PETRI_PLACES=145, PETRI_TRANSITIONS=210} [2023-08-26 13:24:41,119 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 82 predicate places. [2023-08-26 13:24:41,119 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 210 transitions, 3383 flow [2023-08-26 13:24:41,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:41,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:41,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:41,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 13:24:41,120 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 13:24:41,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:41,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1492474561, now seen corresponding path program 21 times [2023-08-26 13:24:41,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:41,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099707997] [2023-08-26 13:24:41,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:41,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:41,241 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 13:24:41,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:41,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099707997] [2023-08-26 13:24:41,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099707997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:41,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:41,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:24:41,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713773568] [2023-08-26 13:24:41,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:41,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:24:41,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:41,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:24:41,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:24:41,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:41,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 210 transitions, 3383 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:41,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:41,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:41,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:41,729 INFO L124 PetriNetUnfolderBase]: 1731/3706 cut-off events. [2023-08-26 13:24:41,729 INFO L125 PetriNetUnfolderBase]: For 43991/44827 co-relation queries the response was YES. [2023-08-26 13:24:41,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20663 conditions, 3706 events. 1731/3706 cut-off events. For 43991/44827 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27586 event pairs, 140 based on Foata normal form. 320/3987 useless extension candidates. Maximal degree in co-relation 20629. Up to 1106 conditions per place. [2023-08-26 13:24:41,748 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 94 selfloop transitions, 153 changer transitions 14/274 dead transitions. [2023-08-26 13:24:41,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 274 transitions, 4201 flow [2023-08-26 13:24:41,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:24:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:24:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1275 transitions. [2023-08-26 13:24:41,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4885057471264368 [2023-08-26 13:24:41,750 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1275 transitions. [2023-08-26 13:24:41,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1275 transitions. [2023-08-26 13:24:41,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:41,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1275 transitions. [2023-08-26 13:24:41,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 141.66666666666666) internal successors, (1275), 9 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:41,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:41,753 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:41,753 INFO L175 Difference]: Start difference. First operand has 145 places, 210 transitions, 3383 flow. Second operand 9 states and 1275 transitions. [2023-08-26 13:24:41,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 274 transitions, 4201 flow [2023-08-26 13:24:41,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 274 transitions, 4161 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-26 13:24:41,816 INFO L231 Difference]: Finished difference. Result has 151 places, 205 transitions, 3592 flow [2023-08-26 13:24:41,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3592, PETRI_PLACES=151, PETRI_TRANSITIONS=205} [2023-08-26 13:24:41,817 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 88 predicate places. [2023-08-26 13:24:41,817 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 205 transitions, 3592 flow [2023-08-26 13:24:41,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:41,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:41,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:41,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-26 13:24:41,818 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 13:24:41,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:41,818 INFO L85 PathProgramCache]: Analyzing trace with hash 81372805, now seen corresponding path program 22 times [2023-08-26 13:24:41,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:41,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10429568] [2023-08-26 13:24:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:41,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:41,937 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 13:24:41,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:41,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10429568] [2023-08-26 13:24:41,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10429568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:41,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:41,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 13:24:41,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049414245] [2023-08-26 13:24:41,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:41,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:24:41,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:41,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:24:41,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:24:41,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:41,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 205 transitions, 3592 flow. Second operand has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:41,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:41,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:41,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:42,468 INFO L124 PetriNetUnfolderBase]: 1696/3663 cut-off events. [2023-08-26 13:24:42,468 INFO L125 PetriNetUnfolderBase]: For 50487/51152 co-relation queries the response was YES. [2023-08-26 13:24:42,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21336 conditions, 3663 events. 1696/3663 cut-off events. For 50487/51152 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 27573 event pairs, 146 based on Foata normal form. 294/3918 useless extension candidates. Maximal degree in co-relation 21301. Up to 1044 conditions per place. [2023-08-26 13:24:42,484 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 104 selfloop transitions, 161 changer transitions 6/284 dead transitions. [2023-08-26 13:24:42,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 284 transitions, 4670 flow [2023-08-26 13:24:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 13:24:42,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 13:24:42,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1413 transitions. [2023-08-26 13:24:42,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48724137931034484 [2023-08-26 13:24:42,486 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1413 transitions. [2023-08-26 13:24:42,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1413 transitions. [2023-08-26 13:24:42,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:42,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1413 transitions. [2023-08-26 13:24:42,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.3) internal successors, (1413), 10 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:42,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:42,489 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:42,489 INFO L175 Difference]: Start difference. First operand has 151 places, 205 transitions, 3592 flow. Second operand 10 states and 1413 transitions. [2023-08-26 13:24:42,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 284 transitions, 4670 flow [2023-08-26 13:24:42,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 284 transitions, 4359 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-08-26 13:24:42,548 INFO L231 Difference]: Finished difference. Result has 151 places, 213 transitions, 3808 flow [2023-08-26 13:24:42,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3808, PETRI_PLACES=151, PETRI_TRANSITIONS=213} [2023-08-26 13:24:42,548 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 88 predicate places. [2023-08-26 13:24:42,549 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 213 transitions, 3808 flow [2023-08-26 13:24:42,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:42,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:42,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:42,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-26 13:24:42,549 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 13:24:42,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:42,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1314185333, now seen corresponding path program 23 times [2023-08-26 13:24:42,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:42,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428212805] [2023-08-26 13:24:42,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:42,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:42,682 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 13:24:42,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:42,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428212805] [2023-08-26 13:24:42,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428212805] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:42,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:42,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 13:24:42,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468054165] [2023-08-26 13:24:42,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:42,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:24:42,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:42,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:24:42,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:24:42,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:42,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 213 transitions, 3808 flow. Second operand has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:42,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:42,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:42,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:43,212 INFO L124 PetriNetUnfolderBase]: 1729/3736 cut-off events. [2023-08-26 13:24:43,212 INFO L125 PetriNetUnfolderBase]: For 53679/54380 co-relation queries the response was YES. [2023-08-26 13:24:43,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21652 conditions, 3736 events. 1729/3736 cut-off events. For 53679/54380 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 28268 event pairs, 162 based on Foata normal form. 322/4021 useless extension candidates. Maximal degree in co-relation 21619. Up to 1066 conditions per place. [2023-08-26 13:24:43,231 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 102 selfloop transitions, 156 changer transitions 17/288 dead transitions. [2023-08-26 13:24:43,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 288 transitions, 4803 flow [2023-08-26 13:24:43,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 13:24:43,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 13:24:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1413 transitions. [2023-08-26 13:24:43,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48724137931034484 [2023-08-26 13:24:43,233 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1413 transitions. [2023-08-26 13:24:43,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1413 transitions. [2023-08-26 13:24:43,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:43,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1413 transitions. [2023-08-26 13:24:43,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.3) internal successors, (1413), 10 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:43,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:43,236 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:43,236 INFO L175 Difference]: Start difference. First operand has 151 places, 213 transitions, 3808 flow. Second operand 10 states and 1413 transitions. [2023-08-26 13:24:43,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 288 transitions, 4803 flow [2023-08-26 13:24:43,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 288 transitions, 4489 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-26 13:24:43,301 INFO L231 Difference]: Finished difference. Result has 155 places, 209 transitions, 3777 flow [2023-08-26 13:24:43,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3777, PETRI_PLACES=155, PETRI_TRANSITIONS=209} [2023-08-26 13:24:43,301 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 92 predicate places. [2023-08-26 13:24:43,301 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 209 transitions, 3777 flow [2023-08-26 13:24:43,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:43,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:43,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:43,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-26 13:24:43,302 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 13:24:43,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:43,302 INFO L85 PathProgramCache]: Analyzing trace with hash -20472539, now seen corresponding path program 24 times [2023-08-26 13:24:43,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:43,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256844362] [2023-08-26 13:24:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:43,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:43,428 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 13:24:43,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:43,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256844362] [2023-08-26 13:24:43,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256844362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:43,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:43,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 13:24:43,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383013768] [2023-08-26 13:24:43,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:43,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:24:43,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:24:43,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:24:43,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:43,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 209 transitions, 3777 flow. Second operand has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:43,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:43,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:43,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:43,940 INFO L124 PetriNetUnfolderBase]: 1670/3650 cut-off events. [2023-08-26 13:24:43,940 INFO L125 PetriNetUnfolderBase]: For 54116/54823 co-relation queries the response was YES. [2023-08-26 13:24:43,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21561 conditions, 3650 events. 1670/3650 cut-off events. For 54116/54823 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 27745 event pairs, 160 based on Foata normal form. 334/3945 useless extension candidates. Maximal degree in co-relation 21527. Up to 1050 conditions per place. [2023-08-26 13:24:43,958 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 94 selfloop transitions, 159 changer transitions 20/285 dead transitions. [2023-08-26 13:24:43,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 285 transitions, 4754 flow [2023-08-26 13:24:43,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 13:24:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 13:24:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1415 transitions. [2023-08-26 13:24:43,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879310344827586 [2023-08-26 13:24:43,960 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1415 transitions. [2023-08-26 13:24:43,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1415 transitions. [2023-08-26 13:24:43,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:43,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1415 transitions. [2023-08-26 13:24:43,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.5) internal successors, (1415), 10 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:43,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:43,963 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:43,963 INFO L175 Difference]: Start difference. First operand has 155 places, 209 transitions, 3777 flow. Second operand 10 states and 1415 transitions. [2023-08-26 13:24:43,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 285 transitions, 4754 flow [2023-08-26 13:24:44,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 285 transitions, 4627 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-26 13:24:44,033 INFO L231 Difference]: Finished difference. Result has 158 places, 209 transitions, 4031 flow [2023-08-26 13:24:44,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=3666, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4031, PETRI_PLACES=158, PETRI_TRANSITIONS=209} [2023-08-26 13:24:44,033 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 95 predicate places. [2023-08-26 13:24:44,033 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 209 transitions, 4031 flow [2023-08-26 13:24:44,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:44,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:44,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:44,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-26 13:24:44,034 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 13:24:44,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:44,034 INFO L85 PathProgramCache]: Analyzing trace with hash 454075907, now seen corresponding path program 25 times [2023-08-26 13:24:44,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:44,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441885300] [2023-08-26 13:24:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:44,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:44,151 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 13:24:44,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:44,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441885300] [2023-08-26 13:24:44,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441885300] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:44,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:44,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:24:44,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046591433] [2023-08-26 13:24:44,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:44,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:24:44,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:44,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:24:44,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:24:44,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:44,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 209 transitions, 4031 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:44,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:44,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:44,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:44,469 INFO L124 PetriNetUnfolderBase]: 786/1789 cut-off events. [2023-08-26 13:24:44,470 INFO L125 PetriNetUnfolderBase]: For 24009/24297 co-relation queries the response was YES. [2023-08-26 13:24:44,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10869 conditions, 1789 events. 786/1789 cut-off events. For 24009/24297 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11836 event pairs, 176 based on Foata normal form. 170/1943 useless extension candidates. Maximal degree in co-relation 10835. Up to 1027 conditions per place. [2023-08-26 13:24:44,478 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 106 selfloop transitions, 26 changer transitions 51/195 dead transitions. [2023-08-26 13:24:44,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 195 transitions, 3335 flow [2023-08-26 13:24:44,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 13:24:44,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 13:24:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1517 transitions. [2023-08-26 13:24:44,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4755485893416928 [2023-08-26 13:24:44,479 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1517 transitions. [2023-08-26 13:24:44,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1517 transitions. [2023-08-26 13:24:44,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:44,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1517 transitions. [2023-08-26 13:24:44,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 137.9090909090909) internal successors, (1517), 11 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:44,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:44,482 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:44,482 INFO L175 Difference]: Start difference. First operand has 158 places, 209 transitions, 4031 flow. Second operand 11 states and 1517 transitions. [2023-08-26 13:24:44,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 195 transitions, 3335 flow [2023-08-26 13:24:44,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 195 transitions, 3081 flow, removed 25 selfloop flow, removed 12 redundant places. [2023-08-26 13:24:44,512 INFO L231 Difference]: Finished difference. Result has 155 places, 118 transitions, 1614 flow [2023-08-26 13:24:44,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1614, PETRI_PLACES=155, PETRI_TRANSITIONS=118} [2023-08-26 13:24:44,512 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 92 predicate places. [2023-08-26 13:24:44,512 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 118 transitions, 1614 flow [2023-08-26 13:24:44,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:44,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:44,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:44,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-26 13:24:44,513 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 13:24:44,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:44,513 INFO L85 PathProgramCache]: Analyzing trace with hash 757936535, now seen corresponding path program 26 times [2023-08-26 13:24:44,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:44,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357867801] [2023-08-26 13:24:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:44,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:44,654 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 13:24:44,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:44,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357867801] [2023-08-26 13:24:44,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357867801] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:44,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:44,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 13:24:44,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908205094] [2023-08-26 13:24:44,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:44,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:24:44,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:44,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:24:44,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:24:44,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:44,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 118 transitions, 1614 flow. Second operand has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:44,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:44,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:44,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:44,950 INFO L124 PetriNetUnfolderBase]: 604/1379 cut-off events. [2023-08-26 13:24:44,950 INFO L125 PetriNetUnfolderBase]: For 13873/14021 co-relation queries the response was YES. [2023-08-26 13:24:44,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7260 conditions, 1379 events. 604/1379 cut-off events. For 13873/14021 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8526 event pairs, 176 based on Foata normal form. 24/1387 useless extension candidates. Maximal degree in co-relation 7225. Up to 1031 conditions per place. [2023-08-26 13:24:44,955 INFO L140 encePairwiseOnDemand]: 282/290 looper letters, 107 selfloop transitions, 21 changer transitions 8/148 dead transitions. [2023-08-26 13:24:44,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 148 transitions, 2024 flow [2023-08-26 13:24:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 13:24:44,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 13:24:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2005 transitions. [2023-08-26 13:24:44,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46091954022988507 [2023-08-26 13:24:44,957 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2005 transitions. [2023-08-26 13:24:44,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2005 transitions. [2023-08-26 13:24:44,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:44,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2005 transitions. [2023-08-26 13:24:44,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 133.66666666666666) internal successors, (2005), 15 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:44,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 290.0) internal successors, (4640), 16 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:44,961 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 290.0) internal successors, (4640), 16 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:44,961 INFO L175 Difference]: Start difference. First operand has 155 places, 118 transitions, 1614 flow. Second operand 15 states and 2005 transitions. [2023-08-26 13:24:44,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 148 transitions, 2024 flow [2023-08-26 13:24:44,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 148 transitions, 1704 flow, removed 45 selfloop flow, removed 33 redundant places. [2023-08-26 13:24:44,973 INFO L231 Difference]: Finished difference. Result has 124 places, 113 transitions, 1287 flow [2023-08-26 13:24:44,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1287, PETRI_PLACES=124, PETRI_TRANSITIONS=113} [2023-08-26 13:24:44,973 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 61 predicate places. [2023-08-26 13:24:44,973 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 113 transitions, 1287 flow [2023-08-26 13:24:44,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:44,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:44,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:44,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-26 13:24:44,974 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 13:24:44,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:44,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1487192239, now seen corresponding path program 27 times [2023-08-26 13:24:44,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:44,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555782725] [2023-08-26 13:24:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:44,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:45,098 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 13:24:45,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:45,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555782725] [2023-08-26 13:24:45,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555782725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:45,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:45,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 13:24:45,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645048974] [2023-08-26 13:24:45,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:45,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:24:45,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:45,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:24:45,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:24:45,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:45,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 113 transitions, 1287 flow. Second operand has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:45,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:45,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:45,371 INFO L124 PetriNetUnfolderBase]: 560/1275 cut-off events. [2023-08-26 13:24:45,371 INFO L125 PetriNetUnfolderBase]: For 8990/9108 co-relation queries the response was YES. [2023-08-26 13:24:45,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5949 conditions, 1275 events. 560/1275 cut-off events. For 8990/9108 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7701 event pairs, 172 based on Foata normal form. 20/1279 useless extension candidates. Maximal degree in co-relation 5925. Up to 935 conditions per place. [2023-08-26 13:24:45,376 INFO L140 encePairwiseOnDemand]: 282/290 looper letters, 85 selfloop transitions, 11 changer transitions 30/138 dead transitions. [2023-08-26 13:24:45,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 138 transitions, 1611 flow [2023-08-26 13:24:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:24:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:24:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1875 transitions. [2023-08-26 13:24:45,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4618226600985222 [2023-08-26 13:24:45,379 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1875 transitions. [2023-08-26 13:24:45,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1875 transitions. [2023-08-26 13:24:45,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:45,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1875 transitions. [2023-08-26 13:24:45,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 133.92857142857142) internal successors, (1875), 14 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,383 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,383 INFO L175 Difference]: Start difference. First operand has 124 places, 113 transitions, 1287 flow. Second operand 14 states and 1875 transitions. [2023-08-26 13:24:45,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 138 transitions, 1611 flow [2023-08-26 13:24:45,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 138 transitions, 1485 flow, removed 4 selfloop flow, removed 23 redundant places. [2023-08-26 13:24:45,392 INFO L231 Difference]: Finished difference. Result has 113 places, 94 transitions, 980 flow [2023-08-26 13:24:45,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=980, PETRI_PLACES=113, PETRI_TRANSITIONS=94} [2023-08-26 13:24:45,392 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 50 predicate places. [2023-08-26 13:24:45,392 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 94 transitions, 980 flow [2023-08-26 13:24:45,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 130.9) internal successors, (1309), 10 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:45,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:45,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-26 13:24:45,393 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 13:24:45,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:45,393 INFO L85 PathProgramCache]: Analyzing trace with hash 619481137, now seen corresponding path program 28 times [2023-08-26 13:24:45,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:45,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133993201] [2023-08-26 13:24:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:45,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:45,502 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 13:24:45,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:45,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133993201] [2023-08-26 13:24:45,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133993201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:45,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:45,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 13:24:45,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958433282] [2023-08-26 13:24:45,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:45,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:24:45,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:45,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:24:45,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:24:45,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:45,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 94 transitions, 980 flow. Second operand has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:45,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:45,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:45,644 INFO L124 PetriNetUnfolderBase]: 143/356 cut-off events. [2023-08-26 13:24:45,644 INFO L125 PetriNetUnfolderBase]: For 2370/2458 co-relation queries the response was YES. [2023-08-26 13:24:45,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1718 conditions, 356 events. 143/356 cut-off events. For 2370/2458 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1509 event pairs, 2 based on Foata normal form. 80/436 useless extension candidates. Maximal degree in co-relation 1696. Up to 123 conditions per place. [2023-08-26 13:24:45,645 INFO L140 encePairwiseOnDemand]: 280/290 looper letters, 37 selfloop transitions, 15 changer transitions 27/87 dead transitions. [2023-08-26 13:24:45,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 87 transitions, 829 flow [2023-08-26 13:24:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:24:45,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:24:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1225 transitions. [2023-08-26 13:24:45,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46934865900383144 [2023-08-26 13:24:45,646 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1225 transitions. [2023-08-26 13:24:45,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1225 transitions. [2023-08-26 13:24:45,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:45,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1225 transitions. [2023-08-26 13:24:45,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 136.11111111111111) internal successors, (1225), 9 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,651 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,651 INFO L175 Difference]: Start difference. First operand has 113 places, 94 transitions, 980 flow. Second operand 9 states and 1225 transitions. [2023-08-26 13:24:45,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 87 transitions, 829 flow [2023-08-26 13:24:45,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 632 flow, removed 22 selfloop flow, removed 26 redundant places. [2023-08-26 13:24:45,654 INFO L231 Difference]: Finished difference. Result has 81 places, 43 transitions, 259 flow [2023-08-26 13:24:45,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=259, PETRI_PLACES=81, PETRI_TRANSITIONS=43} [2023-08-26 13:24:45,655 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2023-08-26 13:24:45,655 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 43 transitions, 259 flow [2023-08-26 13:24:45,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:45,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:45,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-26 13:24:45,655 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 13:24:45,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:45,655 INFO L85 PathProgramCache]: Analyzing trace with hash -155548305, now seen corresponding path program 29 times [2023-08-26 13:24:45,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:45,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619426111] [2023-08-26 13:24:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:45,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:45,776 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 13:24:45,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:45,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619426111] [2023-08-26 13:24:45,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619426111] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:45,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:45,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 13:24:45,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351147000] [2023-08-26 13:24:45,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:45,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:24:45,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:45,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:24:45,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:24:45,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2023-08-26 13:24:45,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 43 transitions, 259 flow. Second operand has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:45,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2023-08-26 13:24:45,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:45,858 INFO L124 PetriNetUnfolderBase]: 36/103 cut-off events. [2023-08-26 13:24:45,858 INFO L125 PetriNetUnfolderBase]: For 338/338 co-relation queries the response was YES. [2023-08-26 13:24:45,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 103 events. 36/103 cut-off events. For 338/338 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 277 event pairs, 0 based on Foata normal form. 4/107 useless extension candidates. Maximal degree in co-relation 422. Up to 27 conditions per place. [2023-08-26 13:24:45,858 INFO L140 encePairwiseOnDemand]: 282/290 looper letters, 0 selfloop transitions, 0 changer transitions 42/42 dead transitions. [2023-08-26 13:24:45,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 42 transitions, 305 flow [2023-08-26 13:24:45,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:24:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:24:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1190 transitions. [2023-08-26 13:24:45,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559386973180077 [2023-08-26 13:24:45,860 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1190 transitions. [2023-08-26 13:24:45,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1190 transitions. [2023-08-26 13:24:45,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:45,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1190 transitions. [2023-08-26 13:24:45,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 132.22222222222223) internal successors, (1190), 9 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,862 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,862 INFO L175 Difference]: Start difference. First operand has 81 places, 43 transitions, 259 flow. Second operand 9 states and 1190 transitions. [2023-08-26 13:24:45,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 42 transitions, 305 flow [2023-08-26 13:24:45,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 218 flow, removed 12 selfloop flow, removed 18 redundant places. [2023-08-26 13:24:45,863 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2023-08-26 13:24:45,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2023-08-26 13:24:45,863 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2023-08-26 13:24:45,863 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2023-08-26 13:24:45,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 131.22222222222223) internal successors, (1181), 9 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:45,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 21 remaining) [2023-08-26 13:24:45,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 21 remaining) [2023-08-26 13:24:45,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 21 remaining) [2023-08-26 13:24:45,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 21 remaining) [2023-08-26 13:24:45,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 21 remaining) [2023-08-26 13:24:45,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 21 remaining) [2023-08-26 13:24:45,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 21 remaining) [2023-08-26 13:24:45,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 21 remaining) [2023-08-26 13:24:45,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 21 remaining) [2023-08-26 13:24:45,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 21 remaining) [2023-08-26 13:24:45,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 21 remaining) [2023-08-26 13:24:45,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 21 remaining) [2023-08-26 13:24:45,867 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 21 remaining) [2023-08-26 13:24:45,867 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 21 remaining) [2023-08-26 13:24:45,867 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 21 remaining) [2023-08-26 13:24:45,867 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 21 remaining) [2023-08-26 13:24:45,867 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONASSERT (4 of 21 remaining) [2023-08-26 13:24:45,867 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 21 remaining) [2023-08-26 13:24:45,867 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 21 remaining) [2023-08-26 13:24:45,867 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 21 remaining) [2023-08-26 13:24:45,867 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 21 remaining) [2023-08-26 13:24:45,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-26 13:24:45,867 INFO L445 BasicCegarLoop]: Path program histogram: [29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:45,869 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 13:24:45,869 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 13:24:45,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:24:45 BasicIcfg [2023-08-26 13:24:45,871 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 13:24:45,871 INFO L158 Benchmark]: Toolchain (without parser) took 31257.79ms. Allocated memory was 352.3MB in the beginning and 2.2GB in the end (delta: 1.8GB). Free memory was 327.7MB in the beginning and 1.7GB in the end (delta: -1.4GB). Peak memory consumption was 433.5MB. Max. memory is 16.0GB. [2023-08-26 13:24:45,871 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory is still 329.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:24:45,872 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.38ms. Allocated memory is still 352.3MB. Free memory was 327.7MB in the beginning and 315.9MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 13:24:45,872 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.54ms. Allocated memory is still 352.3MB. Free memory was 315.9MB in the beginning and 313.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:24:45,872 INFO L158 Benchmark]: Boogie Preprocessor took 29.09ms. Allocated memory is still 352.3MB. Free memory was 313.9MB in the beginning and 312.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:24:45,872 INFO L158 Benchmark]: RCFGBuilder took 536.67ms. Allocated memory is still 352.3MB. Free memory was 312.4MB in the beginning and 286.7MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-26 13:24:45,872 INFO L158 Benchmark]: TraceAbstraction took 30409.69ms. Allocated memory was 352.3MB in the beginning and 2.2GB in the end (delta: 1.8GB). Free memory was 285.7MB in the beginning and 1.7GB in the end (delta: -1.4GB). Peak memory consumption was 391.5MB. Max. memory is 16.0GB. [2023-08-26 13:24:45,873 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory is still 329.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 229.38ms. Allocated memory is still 352.3MB. Free memory was 327.7MB in the beginning and 315.9MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 48.54ms. Allocated memory is still 352.3MB. Free memory was 315.9MB in the beginning and 313.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.09ms. Allocated memory is still 352.3MB. Free memory was 313.9MB in the beginning and 312.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 536.67ms. Allocated memory is still 352.3MB. Free memory was 312.4MB in the beginning and 286.7MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 30409.69ms. Allocated memory was 352.3MB in the beginning and 2.2GB in the end (delta: 1.8GB). Free memory was 285.7MB in the beginning and 1.7GB in the end (delta: -1.4GB). Peak memory consumption was 391.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.2s, 154 PlacesBefore, 63 PlacesAfterwards, 143 TransitionsBefore, 50 TransitionsAfterwards, 1702 CoEnabledTransitionPairs, 7 FixpointIterations, 75 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 130 TotalNumberOfCompositions, 8882 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3852, independent: 3616, independent conditional: 0, independent unconditional: 3616, dependent: 236, dependent conditional: 0, dependent unconditional: 236, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 869, independent: 838, independent conditional: 0, independent unconditional: 838, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3852, independent: 2778, independent conditional: 0, independent unconditional: 2778, dependent: 205, dependent conditional: 0, dependent unconditional: 205, unknown: 869, unknown conditional: 0, unknown unconditional: 869] , Statistics on independence cache: Total cache size (in pairs): 244, Positive cache size: 227, Positive conditional cache size: 0, Positive unconditional cache size: 227, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 192 locations, 21 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 30.3s, OverallIterations: 38, TraceHistogramMax: 1, PathProgramHistogramMax: 29, EmptinessCheckTime: 0.0s, AutomataDifference: 20.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1972 SdHoareTripleChecker+Valid, 4.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1972 mSDsluCounter, 102 SdHoareTripleChecker+Invalid, 3.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 79 mSDsCounter, 571 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10344 IncrementalHoareTripleChecker+Invalid, 10915 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 571 mSolverCounterUnsat, 23 mSDtfsCounter, 10344 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 359 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4031occurred in iteration=33, InterpolantAutomatonStates: 337, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 1035 NumberOfCodeBlocks, 1035 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 997 ConstructedInterpolants, 0 QuantifiedInterpolants, 3656 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 38 InterpolantComputations, 38 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 13:24:45,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...