/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 17:13:52,147 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 17:13:52,230 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 17:13:52,235 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 17:13:52,236 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 17:13:52,266 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 17:13:52,267 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 17:13:52,267 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 17:13:52,268 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 17:13:52,271 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 17:13:52,271 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 17:13:52,272 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 17:13:52,272 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 17:13:52,273 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 17:13:52,273 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 17:13:52,273 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 17:13:52,274 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 17:13:52,274 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 17:13:52,274 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 17:13:52,274 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 17:13:52,274 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 17:13:52,275 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 17:13:52,275 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 17:13:52,276 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 17:13:52,276 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 17:13:52,276 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 17:13:52,276 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 17:13:52,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:13:52,277 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 17:13:52,277 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 17:13:52,278 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 17:13:52,278 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 17:13:52,278 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 17:13:52,279 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 17:13:52,279 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 17:13:52,279 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 17:13:52,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 17:13:52,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 17:13:52,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 17:13:52,620 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 17:13:52,622 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 17:13:52,624 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c [2023-08-26 17:13:53,797 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 17:13:54,021 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 17:13:54,022 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c [2023-08-26 17:13:54,029 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a8eaf2c7/9104abb9ea6348029d8adc6fd254b811/FLAG86fd35614 [2023-08-26 17:13:54,044 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a8eaf2c7/9104abb9ea6348029d8adc6fd254b811 [2023-08-26 17:13:54,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 17:13:54,050 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 17:13:54,052 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 17:13:54,053 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 17:13:54,056 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 17:13:54,056 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:13:54" (1/1) ... [2023-08-26 17:13:54,057 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64c7bce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:13:54, skipping insertion in model container [2023-08-26 17:13:54,057 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:13:54" (1/1) ... [2023-08-26 17:13:54,076 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 17:13:54,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:13:54,253 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 17:13:54,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:13:54,289 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 17:13:54,289 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 17:13:54,295 INFO L206 MainTranslator]: Completed translation [2023-08-26 17:13:54,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:13:54 WrapperNode [2023-08-26 17:13:54,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 17:13:54,296 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 17:13:54,297 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 17:13:54,297 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 17:13:54,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:13:54" (1/1) ... [2023-08-26 17:13:54,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:13:54" (1/1) ... [2023-08-26 17:13:54,334 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 56 [2023-08-26 17:13:54,334 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 17:13:54,335 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 17:13:54,335 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 17:13:54,335 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 17:13:54,342 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:13:54" (1/1) ... [2023-08-26 17:13:54,343 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:13:54" (1/1) ... [2023-08-26 17:13:54,347 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:13:54" (1/1) ... [2023-08-26 17:13:54,347 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:13:54" (1/1) ... [2023-08-26 17:13:54,357 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:13:54" (1/1) ... [2023-08-26 17:13:54,360 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:13:54" (1/1) ... [2023-08-26 17:13:54,361 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:13:54" (1/1) ... [2023-08-26 17:13:54,362 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:13:54" (1/1) ... [2023-08-26 17:13:54,369 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 17:13:54,370 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 17:13:54,370 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 17:13:54,370 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 17:13:54,370 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:13:54" (1/1) ... [2023-08-26 17:13:54,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:13:54,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:13:54,398 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 17:13:54,419 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 17:13:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 17:13:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 17:13:54,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 17:13:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 17:13:54,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 17:13:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 17:13:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 17:13:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 17:13:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 17:13:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 17:13:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 17:13:54,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 17:13:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 17:13:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 17:13:54,436 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 17:13:54,507 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 17:13:54,509 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 17:13:54,771 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 17:13:54,776 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 17:13:54,776 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 17:13:54,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:13:54 BoogieIcfgContainer [2023-08-26 17:13:54,778 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 17:13:54,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 17:13:54,780 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 17:13:54,783 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 17:13:54,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:13:54" (1/3) ... [2023-08-26 17:13:54,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40dbe0ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:13:54, skipping insertion in model container [2023-08-26 17:13:54,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:13:54" (2/3) ... [2023-08-26 17:13:54,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40dbe0ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:13:54, skipping insertion in model container [2023-08-26 17:13:54,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:13:54" (3/3) ... [2023-08-26 17:13:54,785 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2023-08-26 17:13:54,808 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 17:13:54,809 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 17:13:54,809 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 17:13:54,899 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 17:13:54,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 90 transitions, 196 flow [2023-08-26 17:13:54,995 INFO L124 PetriNetUnfolderBase]: 6/88 cut-off events. [2023-08-26 17:13:54,995 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 17:13:54,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 88 events. 6/88 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-26 17:13:55,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 90 transitions, 196 flow [2023-08-26 17:13:55,004 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 79 transitions, 170 flow [2023-08-26 17:13:55,007 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 17:13:55,015 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 79 transitions, 170 flow [2023-08-26 17:13:55,019 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 79 transitions, 170 flow [2023-08-26 17:13:55,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 170 flow [2023-08-26 17:13:55,042 INFO L124 PetriNetUnfolderBase]: 6/79 cut-off events. [2023-08-26 17:13:55,042 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 17:13:55,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 83 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-26 17:13:55,045 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-08-26 17:13:57,281 INFO L134 LiptonReduction]: Checked pairs total: 780 [2023-08-26 17:13:57,282 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-08-26 17:13:57,302 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 17:13:57,307 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;@2f56a21, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 17:13:57,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 17:13:57,309 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 17:13:57,309 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 17:13:57,309 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:13:57,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:13:57,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 17:13:57,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:13:57,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:13:57,315 INFO L85 PathProgramCache]: Analyzing trace with hash 338, now seen corresponding path program 1 times [2023-08-26 17:13:57,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:13:57,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012127627] [2023-08-26 17:13:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:13:57,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:13:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:13:57,402 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 17:13:57,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:13:57,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012127627] [2023-08-26 17:13:57,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012127627] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:13:57,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:13:57,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 17:13:57,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996032764] [2023-08-26 17:13:57,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:13:57,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 17:13:57,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:13:57,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 17:13:57,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 17:13:57,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 166 [2023-08-26 17:13:57,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:13:57,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 166 [2023-08-26 17:13:57,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:13:57,516 INFO L124 PetriNetUnfolderBase]: 88/151 cut-off events. [2023-08-26 17:13:57,517 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 17:13:57,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 151 events. 88/151 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 387 event pairs, 56 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 252. Up to 152 conditions per place. [2023-08-26 17:13:57,520 INFO L140 encePairwiseOnDemand]: 164/166 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-26 17:13:57,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 96 flow [2023-08-26 17:13:57,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 17:13:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 17:13:57,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 185 transitions. [2023-08-26 17:13:57,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572289156626506 [2023-08-26 17:13:57,534 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 185 transitions. [2023-08-26 17:13:57,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 185 transitions. [2023-08-26 17:13:57,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:13:57,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 185 transitions. [2023-08-26 17:13:57,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.5) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,550 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,551 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 58 flow. Second operand 2 states and 185 transitions. [2023-08-26 17:13:57,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 96 flow [2023-08-26 17:13:57,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 17:13:57,555 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-26 17:13:57,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-26 17:13:57,560 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 17:13:57,560 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-26 17:13:57,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:13:57,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:13:57,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 17:13:57,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:13:57,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:13:57,568 INFO L85 PathProgramCache]: Analyzing trace with hash 331282, now seen corresponding path program 1 times [2023-08-26 17:13:57,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:13:57,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445592164] [2023-08-26 17:13:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:13:57,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:13:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:13:57,696 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 17:13:57,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:13:57,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445592164] [2023-08-26 17:13:57,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445592164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:13:57,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:13:57,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:13:57,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899631182] [2023-08-26 17:13:57,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:13:57,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:13:57,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:13:57,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:13:57,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:13:57,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 17:13:57,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:13:57,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 17:13:57,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:13:57,735 INFO L124 PetriNetUnfolderBase]: 82/139 cut-off events. [2023-08-26 17:13:57,735 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 17:13:57,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 139 events. 82/139 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 342 event pairs, 52 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 282. Up to 139 conditions per place. [2023-08-26 17:13:57,737 INFO L140 encePairwiseOnDemand]: 163/166 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-26 17:13:57,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 80 flow [2023-08-26 17:13:57,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:13:57,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:13:57,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 207 transitions. [2023-08-26 17:13:57,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41566265060240964 [2023-08-26 17:13:57,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 207 transitions. [2023-08-26 17:13:57,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 207 transitions. [2023-08-26 17:13:57,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:13:57,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 207 transitions. [2023-08-26 17:13:57,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,743 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,743 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 207 transitions. [2023-08-26 17:13:57,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 80 flow [2023-08-26 17:13:57,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 17:13:57,744 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-26 17:13:57,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-26 17:13:57,745 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 17:13:57,745 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-26 17:13:57,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:13:57,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:13:57,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 17:13:57,746 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:13:57,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:13:57,747 INFO L85 PathProgramCache]: Analyzing trace with hash 331283, now seen corresponding path program 1 times [2023-08-26 17:13:57,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:13:57,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055082599] [2023-08-26 17:13:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:13:57,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:13:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:13:57,883 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 17:13:57,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:13:57,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055082599] [2023-08-26 17:13:57,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055082599] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:13:57,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:13:57,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:13:57,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584455249] [2023-08-26 17:13:57,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:13:57,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:13:57,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:13:57,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:13:57,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:13:57,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 17:13:57,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:13:57,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 17:13:57,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:13:57,937 INFO L124 PetriNetUnfolderBase]: 76/127 cut-off events. [2023-08-26 17:13:57,937 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 17:13:57,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 127 events. 76/127 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 301 event pairs, 48 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 259. Up to 127 conditions per place. [2023-08-26 17:13:57,940 INFO L140 encePairwiseOnDemand]: 163/166 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 17:13:57,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 74 flow [2023-08-26 17:13:57,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:13:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:13:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 211 transitions. [2023-08-26 17:13:57,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42369477911646586 [2023-08-26 17:13:57,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 211 transitions. [2023-08-26 17:13:57,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 211 transitions. [2023-08-26 17:13:57,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:13:57,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 211 transitions. [2023-08-26 17:13:57,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,945 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 211 transitions. [2023-08-26 17:13:57,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 74 flow [2023-08-26 17:13:57,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:13:57,946 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-26 17:13:57,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-26 17:13:57,947 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 17:13:57,947 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-26 17:13:57,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:57,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:13:57,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:13:57,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 17:13:57,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:13:57,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:13:57,949 INFO L85 PathProgramCache]: Analyzing trace with hash 318368389, now seen corresponding path program 1 times [2023-08-26 17:13:57,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:13:57,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995780234] [2023-08-26 17:13:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:13:57,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:13:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:13:58,036 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 17:13:58,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:13:58,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995780234] [2023-08-26 17:13:58,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995780234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:13:58,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:13:58,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:13:58,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123905060] [2023-08-26 17:13:58,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:13:58,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:13:58,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:13:58,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:13:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:13:58,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 166 [2023-08-26 17:13:58,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:13:58,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 166 [2023-08-26 17:13:58,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:13:58,071 INFO L124 PetriNetUnfolderBase]: 58/100 cut-off events. [2023-08-26 17:13:58,071 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 17:13:58,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 100 events. 58/100 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 212 event pairs, 36 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 206. Up to 100 conditions per place. [2023-08-26 17:13:58,075 INFO L140 encePairwiseOnDemand]: 164/166 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 17:13:58,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 71 flow [2023-08-26 17:13:58,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:13:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:13:58,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2023-08-26 17:13:58,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3895582329317269 [2023-08-26 17:13:58,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2023-08-26 17:13:58,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2023-08-26 17:13:58,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:13:58,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2023-08-26 17:13:58,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,081 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 194 transitions. [2023-08-26 17:13:58,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 71 flow [2023-08-26 17:13:58,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:13:58,082 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-26 17:13:58,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-26 17:13:58,084 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 17:13:58,084 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-26 17:13:58,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:13:58,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:13:58,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 17:13:58,085 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:13:58,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:13:58,086 INFO L85 PathProgramCache]: Analyzing trace with hash 318368390, now seen corresponding path program 1 times [2023-08-26 17:13:58,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:13:58,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215496863] [2023-08-26 17:13:58,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:13:58,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:13:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:13:58,257 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 17:13:58,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:13:58,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215496863] [2023-08-26 17:13:58,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215496863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:13:58,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:13:58,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:13:58,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802797925] [2023-08-26 17:13:58,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:13:58,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:13:58,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:13:58,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:13:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:13:58,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 166 [2023-08-26 17:13:58,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:13:58,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 166 [2023-08-26 17:13:58,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:13:58,300 INFO L124 PetriNetUnfolderBase]: 40/73 cut-off events. [2023-08-26 17:13:58,301 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 17:13:58,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 73 events. 40/73 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 130 event pairs, 24 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 153. Up to 73 conditions per place. [2023-08-26 17:13:58,301 INFO L140 encePairwiseOnDemand]: 164/166 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 17:13:58,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 68 flow [2023-08-26 17:13:58,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:13:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:13:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-08-26 17:13:58,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39357429718875503 [2023-08-26 17:13:58,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-08-26 17:13:58,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-08-26 17:13:58,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:13:58,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-08-26 17:13:58,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,309 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 196 transitions. [2023-08-26 17:13:58,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 68 flow [2023-08-26 17:13:58,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 67 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:13:58,310 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-26 17:13:58,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-26 17:13:58,311 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 17:13:58,311 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-26 17:13:58,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:13:58,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:13:58,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 17:13:58,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:13:58,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:13:58,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1665831399, now seen corresponding path program 1 times [2023-08-26 17:13:58,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:13:58,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326899114] [2023-08-26 17:13:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:13:58,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:13:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:13:58,721 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 17:13:58,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:13:58,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326899114] [2023-08-26 17:13:58,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326899114] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:13:58,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:13:58,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 17:13:58,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110741497] [2023-08-26 17:13:58,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:13:58,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 17:13:58,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:13:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 17:13:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-26 17:13:58,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 166 [2023-08-26 17:13:58,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 8 states, 8 states have (on average 56.625) internal successors, (453), 8 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:13:58,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 166 [2023-08-26 17:13:58,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:13:58,902 INFO L124 PetriNetUnfolderBase]: 46/88 cut-off events. [2023-08-26 17:13:58,902 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 17:13:58,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 88 events. 46/88 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 212 event pairs, 1 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 184. Up to 22 conditions per place. [2023-08-26 17:13:58,903 INFO L140 encePairwiseOnDemand]: 159/166 looper letters, 29 selfloop transitions, 8 changer transitions 5/42 dead transitions. [2023-08-26 17:13:58,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 183 flow [2023-08-26 17:13:58,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:13:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:13:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 428 transitions. [2023-08-26 17:13:58,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3683304647160069 [2023-08-26 17:13:58,905 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 428 transitions. [2023-08-26 17:13:58,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 428 transitions. [2023-08-26 17:13:58,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:13:58,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 428 transitions. [2023-08-26 17:13:58,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 61.142857142857146) internal successors, (428), 7 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,911 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,911 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 7 states and 428 transitions. [2023-08-26 17:13:58,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 183 flow [2023-08-26 17:13:58,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 42 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:13:58,913 INFO L231 Difference]: Finished difference. Result has 32 places, 21 transitions, 88 flow [2023-08-26 17:13:58,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=21} [2023-08-26 17:13:58,916 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2023-08-26 17:13:58,918 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 21 transitions, 88 flow [2023-08-26 17:13:58,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 56.625) internal successors, (453), 8 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:58,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:13:58,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:13:58,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 17:13:58,920 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:13:58,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:13:58,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1995086593, now seen corresponding path program 2 times [2023-08-26 17:13:58,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:13:58,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103076631] [2023-08-26 17:13:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:13:58,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:13:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:13:59,233 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 17:13:59,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:13:59,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103076631] [2023-08-26 17:13:59,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103076631] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:13:59,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:13:59,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 17:13:59,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716075072] [2023-08-26 17:13:59,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:13:59,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 17:13:59,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:13:59,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 17:13:59,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-26 17:13:59,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 166 [2023-08-26 17:13:59,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 21 transitions, 88 flow. Second operand has 8 states, 8 states have (on average 56.625) internal successors, (453), 8 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:13:59,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 166 [2023-08-26 17:13:59,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:13:59,377 INFO L124 PetriNetUnfolderBase]: 56/104 cut-off events. [2023-08-26 17:13:59,378 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-08-26 17:13:59,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 104 events. 56/104 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 230 event pairs, 5 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 312. Up to 57 conditions per place. [2023-08-26 17:13:59,379 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 27 selfloop transitions, 12 changer transitions 5/44 dead transitions. [2023-08-26 17:13:59,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 44 transitions, 250 flow [2023-08-26 17:13:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:13:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:13:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 428 transitions. [2023-08-26 17:13:59,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3683304647160069 [2023-08-26 17:13:59,381 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 428 transitions. [2023-08-26 17:13:59,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 428 transitions. [2023-08-26 17:13:59,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:13:59,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 428 transitions. [2023-08-26 17:13:59,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 61.142857142857146) internal successors, (428), 7 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,385 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,385 INFO L175 Difference]: Start difference. First operand has 32 places, 21 transitions, 88 flow. Second operand 7 states and 428 transitions. [2023-08-26 17:13:59,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 44 transitions, 250 flow [2023-08-26 17:13:59,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 240 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 17:13:59,387 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 162 flow [2023-08-26 17:13:59,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2023-08-26 17:13:59,388 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 11 predicate places. [2023-08-26 17:13:59,388 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 162 flow [2023-08-26 17:13:59,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 56.625) internal successors, (453), 8 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:13:59,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:13:59,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 17:13:59,389 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:13:59,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:13:59,389 INFO L85 PathProgramCache]: Analyzing trace with hash -833557973, now seen corresponding path program 3 times [2023-08-26 17:13:59,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:13:59,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883771542] [2023-08-26 17:13:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:13:59,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:13:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:13:59,512 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 17:13:59,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:13:59,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883771542] [2023-08-26 17:13:59,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883771542] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:13:59,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:13:59,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:13:59,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924782183] [2023-08-26 17:13:59,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:13:59,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 17:13:59,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:13:59,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 17:13:59,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 17:13:59,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 17:13:59,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:13:59,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 17:13:59,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:13:59,619 INFO L124 PetriNetUnfolderBase]: 62/114 cut-off events. [2023-08-26 17:13:59,619 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2023-08-26 17:13:59,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 114 events. 62/114 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 276 event pairs, 5 based on Foata normal form. 1/115 useless extension candidates. Maximal degree in co-relation 417. Up to 66 conditions per place. [2023-08-26 17:13:59,620 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 30 selfloop transitions, 15 changer transitions 5/50 dead transitions. [2023-08-26 17:13:59,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 353 flow [2023-08-26 17:13:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:13:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:13:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 477 transitions. [2023-08-26 17:13:59,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41049913941480204 [2023-08-26 17:13:59,623 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 477 transitions. [2023-08-26 17:13:59,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 477 transitions. [2023-08-26 17:13:59,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:13:59,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 477 transitions. [2023-08-26 17:13:59,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.14285714285714) internal successors, (477), 7 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,627 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,627 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 162 flow. Second operand 7 states and 477 transitions. [2023-08-26 17:13:59,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 353 flow [2023-08-26 17:13:59,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 321 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-26 17:13:59,630 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 228 flow [2023-08-26 17:13:59,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=228, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2023-08-26 17:13:59,631 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 17 predicate places. [2023-08-26 17:13:59,631 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 228 flow [2023-08-26 17:13:59,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:13:59,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:13:59,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 17:13:59,632 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:13:59,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:13:59,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2012816481, now seen corresponding path program 4 times [2023-08-26 17:13:59,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:13:59,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758885930] [2023-08-26 17:13:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:13:59,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:13:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:13:59,778 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 17:13:59,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:13:59,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758885930] [2023-08-26 17:13:59,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758885930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:13:59,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:13:59,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:13:59,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904801528] [2023-08-26 17:13:59,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:13:59,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 17:13:59,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:13:59,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 17:13:59,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 17:13:59,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 17:13:59,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:13:59,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 17:13:59,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:13:59,900 INFO L124 PetriNetUnfolderBase]: 67/123 cut-off events. [2023-08-26 17:13:59,900 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2023-08-26 17:13:59,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 123 events. 67/123 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 307 event pairs, 5 based on Foata normal form. 1/122 useless extension candidates. Maximal degree in co-relation 492. Up to 71 conditions per place. [2023-08-26 17:13:59,902 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 33 selfloop transitions, 15 changer transitions 5/53 dead transitions. [2023-08-26 17:13:59,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 410 flow [2023-08-26 17:13:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:13:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:13:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 479 transitions. [2023-08-26 17:13:59,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41222030981067126 [2023-08-26 17:13:59,904 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 479 transitions. [2023-08-26 17:13:59,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 479 transitions. [2023-08-26 17:13:59,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:13:59,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 479 transitions. [2023-08-26 17:13:59,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.42857142857143) internal successors, (479), 7 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,907 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,908 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 228 flow. Second operand 7 states and 479 transitions. [2023-08-26 17:13:59,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 410 flow [2023-08-26 17:13:59,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 370 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-26 17:13:59,913 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 236 flow [2023-08-26 17:13:59,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=236, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-08-26 17:13:59,914 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 20 predicate places. [2023-08-26 17:13:59,914 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 236 flow [2023-08-26 17:13:59,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:13:59,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:13:59,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:13:59,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 17:13:59,916 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:13:59,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:13:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1917360913, now seen corresponding path program 5 times [2023-08-26 17:13:59,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:13:59,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995808535] [2023-08-26 17:13:59,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:13:59,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:13:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:00,048 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 17:14:00,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:00,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995808535] [2023-08-26 17:14:00,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995808535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:14:00,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:14:00,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:14:00,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049016466] [2023-08-26 17:14:00,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:14:00,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 17:14:00,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:00,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 17:14:00,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 17:14:00,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 17:14:00,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:00,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 17:14:00,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:00,164 INFO L124 PetriNetUnfolderBase]: 66/124 cut-off events. [2023-08-26 17:14:00,165 INFO L125 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2023-08-26 17:14:00,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 124 events. 66/124 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 314 event pairs, 7 based on Foata normal form. 1/121 useless extension candidates. Maximal degree in co-relation 510. Up to 76 conditions per place. [2023-08-26 17:14:00,166 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 30 selfloop transitions, 15 changer transitions 5/50 dead transitions. [2023-08-26 17:14:00,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 401 flow [2023-08-26 17:14:00,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:14:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:14:00,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 475 transitions. [2023-08-26 17:14:00,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087779690189329 [2023-08-26 17:14:00,168 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 475 transitions. [2023-08-26 17:14:00,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 475 transitions. [2023-08-26 17:14:00,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:00,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 475 transitions. [2023-08-26 17:14:00,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 67.85714285714286) internal successors, (475), 7 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,173 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,173 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 236 flow. Second operand 7 states and 475 transitions. [2023-08-26 17:14:00,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 401 flow [2023-08-26 17:14:00,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 50 transitions, 361 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-26 17:14:00,175 INFO L231 Difference]: Finished difference. Result has 50 places, 36 transitions, 242 flow [2023-08-26 17:14:00,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=242, PETRI_PLACES=50, PETRI_TRANSITIONS=36} [2023-08-26 17:14:00,177 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2023-08-26 17:14:00,177 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 36 transitions, 242 flow [2023-08-26 17:14:00,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:00,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:00,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 17:14:00,178 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:00,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:00,178 INFO L85 PathProgramCache]: Analyzing trace with hash 723323683, now seen corresponding path program 6 times [2023-08-26 17:14:00,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:00,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986362509] [2023-08-26 17:14:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:00,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:00,302 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 17:14:00,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:00,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986362509] [2023-08-26 17:14:00,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986362509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:14:00,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:14:00,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:14:00,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601810770] [2023-08-26 17:14:00,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:14:00,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 17:14:00,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:00,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 17:14:00,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 17:14:00,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 17:14:00,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 242 flow. Second operand has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:00,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 17:14:00,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:00,411 INFO L124 PetriNetUnfolderBase]: 67/127 cut-off events. [2023-08-26 17:14:00,411 INFO L125 PetriNetUnfolderBase]: For 316/316 co-relation queries the response was YES. [2023-08-26 17:14:00,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 127 events. 67/127 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 329 event pairs, 9 based on Foata normal form. 1/124 useless extension candidates. Maximal degree in co-relation 516. Up to 59 conditions per place. [2023-08-26 17:14:00,413 INFO L140 encePairwiseOnDemand]: 159/166 looper letters, 32 selfloop transitions, 14 changer transitions 5/51 dead transitions. [2023-08-26 17:14:00,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 417 flow [2023-08-26 17:14:00,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:14:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:14:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 471 transitions. [2023-08-26 17:14:00,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053356282271945 [2023-08-26 17:14:00,415 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 471 transitions. [2023-08-26 17:14:00,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 471 transitions. [2023-08-26 17:14:00,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:00,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 471 transitions. [2023-08-26 17:14:00,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 67.28571428571429) internal successors, (471), 7 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,418 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,419 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 242 flow. Second operand 7 states and 471 transitions. [2023-08-26 17:14:00,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 417 flow [2023-08-26 17:14:00,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 379 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-26 17:14:00,422 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 248 flow [2023-08-26 17:14:00,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=248, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2023-08-26 17:14:00,422 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 24 predicate places. [2023-08-26 17:14:00,423 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 248 flow [2023-08-26 17:14:00,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:00,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:00,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 17:14:00,423 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:00,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash -17960457, now seen corresponding path program 1 times [2023-08-26 17:14:00,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:00,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97319675] [2023-08-26 17:14:00,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:00,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:00,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:00,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97319675] [2023-08-26 17:14:00,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97319675] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:14:00,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:14:00,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:14:00,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64420612] [2023-08-26 17:14:00,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:14:00,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:14:00,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:00,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:14:00,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:14:00,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 17:14:00,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:00,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 17:14:00,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:00,584 INFO L124 PetriNetUnfolderBase]: 104/195 cut-off events. [2023-08-26 17:14:00,584 INFO L125 PetriNetUnfolderBase]: For 607/607 co-relation queries the response was YES. [2023-08-26 17:14:00,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826 conditions, 195 events. 104/195 cut-off events. For 607/607 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 624 event pairs, 14 based on Foata normal form. 4/193 useless extension candidates. Maximal degree in co-relation 809. Up to 78 conditions per place. [2023-08-26 17:14:00,586 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 46 selfloop transitions, 22 changer transitions 4/72 dead transitions. [2023-08-26 17:14:00,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 590 flow [2023-08-26 17:14:00,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:14:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:14:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 494 transitions. [2023-08-26 17:14:00,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42512908777969016 [2023-08-26 17:14:00,589 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 494 transitions. [2023-08-26 17:14:00,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 494 transitions. [2023-08-26 17:14:00,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:00,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 494 transitions. [2023-08-26 17:14:00,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.57142857142857) internal successors, (494), 7 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,593 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,593 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 248 flow. Second operand 7 states and 494 transitions. [2023-08-26 17:14:00,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 590 flow [2023-08-26 17:14:00,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 72 transitions, 522 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-26 17:14:00,597 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 366 flow [2023-08-26 17:14:00,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=366, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-08-26 17:14:00,598 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2023-08-26 17:14:00,598 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 366 flow [2023-08-26 17:14:00,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:00,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:00,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 17:14:00,599 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:00,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:00,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1740610404, now seen corresponding path program 1 times [2023-08-26 17:14:00,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:00,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618615985] [2023-08-26 17:14:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:00,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:00,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:00,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618615985] [2023-08-26 17:14:00,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618615985] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:14:00,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761447501] [2023-08-26 17:14:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:00,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:00,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:14:00,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:14:00,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 17:14:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:00,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 17:14:00,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:14:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:00,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:14:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:00,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761447501] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 17:14:00,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 17:14:00,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-08-26 17:14:00,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795497332] [2023-08-26 17:14:00,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:14:00,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:14:00,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:00,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:14:00,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 17:14:00,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 17:14:00,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 366 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:00,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 17:14:00,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:00,950 INFO L124 PetriNetUnfolderBase]: 123/242 cut-off events. [2023-08-26 17:14:00,951 INFO L125 PetriNetUnfolderBase]: For 1001/1001 co-relation queries the response was YES. [2023-08-26 17:14:00,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1101 conditions, 242 events. 123/242 cut-off events. For 1001/1001 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 866 event pairs, 4 based on Foata normal form. 6/248 useless extension candidates. Maximal degree in co-relation 1083. Up to 125 conditions per place. [2023-08-26 17:14:00,953 INFO L140 encePairwiseOnDemand]: 159/166 looper letters, 49 selfloop transitions, 22 changer transitions 0/71 dead transitions. [2023-08-26 17:14:00,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 641 flow [2023-08-26 17:14:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:14:00,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:14:00,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 362 transitions. [2023-08-26 17:14:00,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43614457831325304 [2023-08-26 17:14:00,955 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 362 transitions. [2023-08-26 17:14:00,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 362 transitions. [2023-08-26 17:14:00,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:00,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 362 transitions. [2023-08-26 17:14:00,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,958 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,958 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 366 flow. Second operand 5 states and 362 transitions. [2023-08-26 17:14:00,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 641 flow [2023-08-26 17:14:00,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 613 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-26 17:14:00,964 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 493 flow [2023-08-26 17:14:00,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=493, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2023-08-26 17:14:00,964 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 32 predicate places. [2023-08-26 17:14:00,964 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 493 flow [2023-08-26 17:14:00,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:00,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:00,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:00,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 17:14:01,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-26 17:14:01,171 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:01,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash 393095176, now seen corresponding path program 2 times [2023-08-26 17:14:01,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:01,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675467207] [2023-08-26 17:14:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:01,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:01,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:01,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675467207] [2023-08-26 17:14:01,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675467207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:14:01,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:14:01,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:14:01,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589300211] [2023-08-26 17:14:01,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:14:01,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:14:01,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:01,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:14:01,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:14:01,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 17:14:01,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 493 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:01,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 17:14:01,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:01,304 INFO L124 PetriNetUnfolderBase]: 117/228 cut-off events. [2023-08-26 17:14:01,304 INFO L125 PetriNetUnfolderBase]: For 1333/1333 co-relation queries the response was YES. [2023-08-26 17:14:01,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 228 events. 117/228 cut-off events. For 1333/1333 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 784 event pairs, 6 based on Foata normal form. 4/232 useless extension candidates. Maximal degree in co-relation 1156. Up to 92 conditions per place. [2023-08-26 17:14:01,307 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 46 selfloop transitions, 19 changer transitions 2/67 dead transitions. [2023-08-26 17:14:01,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 67 transitions, 710 flow [2023-08-26 17:14:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 17:14:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 17:14:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 424 transitions. [2023-08-26 17:14:01,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42570281124497994 [2023-08-26 17:14:01,309 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 424 transitions. [2023-08-26 17:14:01,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 424 transitions. [2023-08-26 17:14:01,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:01,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 424 transitions. [2023-08-26 17:14:01,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.66666666666667) internal successors, (424), 6 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,313 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,313 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 493 flow. Second operand 6 states and 424 transitions. [2023-08-26 17:14:01,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 67 transitions, 710 flow [2023-08-26 17:14:01,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 679 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-26 17:14:01,320 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 476 flow [2023-08-26 17:14:01,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=476, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2023-08-26 17:14:01,320 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 37 predicate places. [2023-08-26 17:14:01,320 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 476 flow [2023-08-26 17:14:01,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:01,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:01,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 17:14:01,321 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:01,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:01,322 INFO L85 PathProgramCache]: Analyzing trace with hash -857560795, now seen corresponding path program 2 times [2023-08-26 17:14:01,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:01,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372159915] [2023-08-26 17:14:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:01,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:01,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:01,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372159915] [2023-08-26 17:14:01,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372159915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:14:01,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:14:01,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:14:01,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728067555] [2023-08-26 17:14:01,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:14:01,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:14:01,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:01,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:14:01,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:14:01,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 17:14:01,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 476 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:01,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 17:14:01,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:01,474 INFO L124 PetriNetUnfolderBase]: 125/254 cut-off events. [2023-08-26 17:14:01,474 INFO L125 PetriNetUnfolderBase]: For 1636/1636 co-relation queries the response was YES. [2023-08-26 17:14:01,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1319 conditions, 254 events. 125/254 cut-off events. For 1636/1636 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 948 event pairs, 20 based on Foata normal form. 8/262 useless extension candidates. Maximal degree in co-relation 1298. Up to 108 conditions per place. [2023-08-26 17:14:01,477 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 65 selfloop transitions, 21 changer transitions 1/87 dead transitions. [2023-08-26 17:14:01,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 87 transitions, 889 flow [2023-08-26 17:14:01,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 17:14:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 17:14:01,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 571 transitions. [2023-08-26 17:14:01,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299698795180723 [2023-08-26 17:14:01,480 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 571 transitions. [2023-08-26 17:14:01,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 571 transitions. [2023-08-26 17:14:01,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:01,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 571 transitions. [2023-08-26 17:14:01,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.375) internal successors, (571), 8 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 166.0) internal successors, (1494), 9 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,484 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 166.0) internal successors, (1494), 9 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,484 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 476 flow. Second operand 8 states and 571 transitions. [2023-08-26 17:14:01,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 87 transitions, 889 flow [2023-08-26 17:14:01,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 849 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-08-26 17:14:01,491 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 590 flow [2023-08-26 17:14:01,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=590, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-08-26 17:14:01,492 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2023-08-26 17:14:01,492 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 590 flow [2023-08-26 17:14:01,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:01,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:01,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 17:14:01,493 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:01,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:01,493 INFO L85 PathProgramCache]: Analyzing trace with hash 937643691, now seen corresponding path program 3 times [2023-08-26 17:14:01,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:01,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040336734] [2023-08-26 17:14:01,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:01,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:01,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:01,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040336734] [2023-08-26 17:14:01,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040336734] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:14:01,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745168847] [2023-08-26 17:14:01,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 17:14:01,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:01,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:14:01,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:14:01,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 17:14:01,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 17:14:01,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:14:01,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 17:14:01,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:14:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:01,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:14:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:01,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745168847] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 17:14:01,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 17:14:01,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-08-26 17:14:01,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152225719] [2023-08-26 17:14:01,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:14:01,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:14:01,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:01,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:14:01,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 17:14:01,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 17:14:01,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 590 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:01,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 17:14:01,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:01,739 INFO L124 PetriNetUnfolderBase]: 118/233 cut-off events. [2023-08-26 17:14:01,739 INFO L125 PetriNetUnfolderBase]: For 1562/1562 co-relation queries the response was YES. [2023-08-26 17:14:01,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1279 conditions, 233 events. 118/233 cut-off events. For 1562/1562 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 819 event pairs, 22 based on Foata normal form. 4/237 useless extension candidates. Maximal degree in co-relation 1256. Up to 128 conditions per place. [2023-08-26 17:14:01,741 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 54 selfloop transitions, 20 changer transitions 0/74 dead transitions. [2023-08-26 17:14:01,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 74 transitions, 811 flow [2023-08-26 17:14:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 17:14:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 17:14:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 430 transitions. [2023-08-26 17:14:01,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43172690763052207 [2023-08-26 17:14:01,744 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 430 transitions. [2023-08-26 17:14:01,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 430 transitions. [2023-08-26 17:14:01,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:01,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 430 transitions. [2023-08-26 17:14:01,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.66666666666667) internal successors, (430), 6 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,747 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,747 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 590 flow. Second operand 6 states and 430 transitions. [2023-08-26 17:14:01,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 74 transitions, 811 flow [2023-08-26 17:14:01,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 776 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-26 17:14:01,755 INFO L231 Difference]: Finished difference. Result has 76 places, 54 transitions, 592 flow [2023-08-26 17:14:01,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=592, PETRI_PLACES=76, PETRI_TRANSITIONS=54} [2023-08-26 17:14:01,755 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 48 predicate places. [2023-08-26 17:14:01,755 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 54 transitions, 592 flow [2023-08-26 17:14:01,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:01,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:01,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:01,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 17:14:01,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 17:14:01,962 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:01,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:01,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1751104154, now seen corresponding path program 3 times [2023-08-26 17:14:01,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:01,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142801273] [2023-08-26 17:14:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:01,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:01,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:01,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142801273] [2023-08-26 17:14:01,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142801273] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:14:01,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:14:01,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:14:01,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939714032] [2023-08-26 17:14:01,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:14:01,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:14:01,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:02,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:14:02,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:14:02,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 17:14:02,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 54 transitions, 592 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:02,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 17:14:02,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:02,104 INFO L124 PetriNetUnfolderBase]: 152/303 cut-off events. [2023-08-26 17:14:02,105 INFO L125 PetriNetUnfolderBase]: For 2131/2131 co-relation queries the response was YES. [2023-08-26 17:14:02,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1678 conditions, 303 events. 152/303 cut-off events. For 2131/2131 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1184 event pairs, 26 based on Foata normal form. 2/305 useless extension candidates. Maximal degree in co-relation 1654. Up to 120 conditions per place. [2023-08-26 17:14:02,108 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 54 selfloop transitions, 29 changer transitions 2/85 dead transitions. [2023-08-26 17:14:02,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 1030 flow [2023-08-26 17:14:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:14:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:14:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 490 transitions. [2023-08-26 17:14:02,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42168674698795183 [2023-08-26 17:14:02,110 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 490 transitions. [2023-08-26 17:14:02,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 490 transitions. [2023-08-26 17:14:02,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:02,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 490 transitions. [2023-08-26 17:14:02,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,114 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 166.0) internal successors, (1328), 8 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,114 INFO L175 Difference]: Start difference. First operand has 76 places, 54 transitions, 592 flow. Second operand 7 states and 490 transitions. [2023-08-26 17:14:02,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 1030 flow [2023-08-26 17:14:02,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 85 transitions, 980 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-26 17:14:02,124 INFO L231 Difference]: Finished difference. Result has 82 places, 64 transitions, 792 flow [2023-08-26 17:14:02,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=792, PETRI_PLACES=82, PETRI_TRANSITIONS=64} [2023-08-26 17:14:02,124 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2023-08-26 17:14:02,124 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 792 flow [2023-08-26 17:14:02,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:02,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:02,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 17:14:02,125 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:02,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:02,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2127726375, now seen corresponding path program 4 times [2023-08-26 17:14:02,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:02,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112250189] [2023-08-26 17:14:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:02,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:02,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:02,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112250189] [2023-08-26 17:14:02,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112250189] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:14:02,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:14:02,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:14:02,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771306499] [2023-08-26 17:14:02,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:14:02,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:14:02,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:02,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:14:02,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:14:02,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 17:14:02,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 64 transitions, 792 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:02,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 17:14:02,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:02,258 INFO L124 PetriNetUnfolderBase]: 140/277 cut-off events. [2023-08-26 17:14:02,258 INFO L125 PetriNetUnfolderBase]: For 2154/2154 co-relation queries the response was YES. [2023-08-26 17:14:02,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1645 conditions, 277 events. 140/277 cut-off events. For 2154/2154 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1044 event pairs, 10 based on Foata normal form. 4/281 useless extension candidates. Maximal degree in co-relation 1618. Up to 183 conditions per place. [2023-08-26 17:14:02,261 INFO L140 encePairwiseOnDemand]: 161/166 looper letters, 60 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2023-08-26 17:14:02,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 76 transitions, 969 flow [2023-08-26 17:14:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:14:02,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:14:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 357 transitions. [2023-08-26 17:14:02,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43012048192771085 [2023-08-26 17:14:02,263 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 357 transitions. [2023-08-26 17:14:02,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 357 transitions. [2023-08-26 17:14:02,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:02,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 357 transitions. [2023-08-26 17:14:02,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,266 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,266 INFO L175 Difference]: Start difference. First operand has 82 places, 64 transitions, 792 flow. Second operand 5 states and 357 transitions. [2023-08-26 17:14:02,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 76 transitions, 969 flow [2023-08-26 17:14:02,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 76 transitions, 932 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-26 17:14:02,274 INFO L231 Difference]: Finished difference. Result has 82 places, 63 transitions, 766 flow [2023-08-26 17:14:02,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=766, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2023-08-26 17:14:02,275 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2023-08-26 17:14:02,275 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 766 flow [2023-08-26 17:14:02,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:02,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:02,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 17:14:02,276 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:02,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:02,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2052029221, now seen corresponding path program 5 times [2023-08-26 17:14:02,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:02,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131980833] [2023-08-26 17:14:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:02,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:02,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:02,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131980833] [2023-08-26 17:14:02,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131980833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:14:02,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:14:02,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:14:02,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679554858] [2023-08-26 17:14:02,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:14:02,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:14:02,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:02,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:14:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:14:02,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 17:14:02,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 766 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:02,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 17:14:02,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:02,408 INFO L124 PetriNetUnfolderBase]: 126/253 cut-off events. [2023-08-26 17:14:02,409 INFO L125 PetriNetUnfolderBase]: For 1908/1908 co-relation queries the response was YES. [2023-08-26 17:14:02,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1496 conditions, 253 events. 126/253 cut-off events. For 1908/1908 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 930 event pairs, 8 based on Foata normal form. 8/261 useless extension candidates. Maximal degree in co-relation 1472. Up to 106 conditions per place. [2023-08-26 17:14:02,411 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 55 selfloop transitions, 20 changer transitions 2/77 dead transitions. [2023-08-26 17:14:02,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 77 transitions, 973 flow [2023-08-26 17:14:02,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 17:14:02,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 17:14:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 424 transitions. [2023-08-26 17:14:02,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42570281124497994 [2023-08-26 17:14:02,413 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 424 transitions. [2023-08-26 17:14:02,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 424 transitions. [2023-08-26 17:14:02,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:02,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 424 transitions. [2023-08-26 17:14:02,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.66666666666667) internal successors, (424), 6 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,417 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,417 INFO L175 Difference]: Start difference. First operand has 82 places, 63 transitions, 766 flow. Second operand 6 states and 424 transitions. [2023-08-26 17:14:02,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 77 transitions, 973 flow [2023-08-26 17:14:02,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 947 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-26 17:14:02,424 INFO L231 Difference]: Finished difference. Result has 82 places, 58 transitions, 697 flow [2023-08-26 17:14:02,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=697, PETRI_PLACES=82, PETRI_TRANSITIONS=58} [2023-08-26 17:14:02,425 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2023-08-26 17:14:02,425 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 58 transitions, 697 flow [2023-08-26 17:14:02,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:02,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:02,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 17:14:02,426 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:02,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:02,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2084235640, now seen corresponding path program 4 times [2023-08-26 17:14:02,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:02,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678071421] [2023-08-26 17:14:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:02,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:02,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:02,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678071421] [2023-08-26 17:14:02,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678071421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:14:02,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076345557] [2023-08-26 17:14:02,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:14:02,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:02,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:14:02,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:14:02,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 17:14:02,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:14:02,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:14:02,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 17:14:02,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:14:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:02,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:14:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:02,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076345557] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 17:14:02,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 17:14:02,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-08-26 17:14:02,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840486223] [2023-08-26 17:14:02,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:14:02,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:14:02,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:02,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:14:02,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 17:14:02,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 17:14:02,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 58 transitions, 697 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:02,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 17:14:02,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:02,670 INFO L124 PetriNetUnfolderBase]: 116/227 cut-off events. [2023-08-26 17:14:02,671 INFO L125 PetriNetUnfolderBase]: For 1975/1975 co-relation queries the response was YES. [2023-08-26 17:14:02,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 227 events. 116/227 cut-off events. For 1975/1975 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 778 event pairs, 20 based on Foata normal form. 6/233 useless extension candidates. Maximal degree in co-relation 1352. Up to 132 conditions per place. [2023-08-26 17:14:02,673 INFO L140 encePairwiseOnDemand]: 159/166 looper letters, 55 selfloop transitions, 25 changer transitions 0/80 dead transitions. [2023-08-26 17:14:02,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 80 transitions, 953 flow [2023-08-26 17:14:02,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 17:14:02,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 17:14:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 431 transitions. [2023-08-26 17:14:02,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327309236947791 [2023-08-26 17:14:02,675 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 431 transitions. [2023-08-26 17:14:02,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 431 transitions. [2023-08-26 17:14:02,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:02,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 431 transitions. [2023-08-26 17:14:02,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.83333333333333) internal successors, (431), 6 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,679 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,679 INFO L175 Difference]: Start difference. First operand has 82 places, 58 transitions, 697 flow. Second operand 6 states and 431 transitions. [2023-08-26 17:14:02,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 80 transitions, 953 flow [2023-08-26 17:14:02,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 902 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-26 17:14:02,689 INFO L231 Difference]: Finished difference. Result has 82 places, 60 transitions, 742 flow [2023-08-26 17:14:02,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=742, PETRI_PLACES=82, PETRI_TRANSITIONS=60} [2023-08-26 17:14:02,689 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2023-08-26 17:14:02,689 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 60 transitions, 742 flow [2023-08-26 17:14:02,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:02,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:02,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 17:14:02,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:02,898 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:02,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:02,899 INFO L85 PathProgramCache]: Analyzing trace with hash 444806906, now seen corresponding path program 5 times [2023-08-26 17:14:02,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:02,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296259338] [2023-08-26 17:14:02,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:02,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:02,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:02,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296259338] [2023-08-26 17:14:02,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296259338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:14:02,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:14:02,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:14:02,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689023459] [2023-08-26 17:14:02,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:14:02,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:14:02,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:02,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:14:02,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:14:02,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 166 [2023-08-26 17:14:02,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 60 transitions, 742 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:02,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:02,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 166 [2023-08-26 17:14:02,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:03,055 INFO L124 PetriNetUnfolderBase]: 112/215 cut-off events. [2023-08-26 17:14:03,055 INFO L125 PetriNetUnfolderBase]: For 1757/1757 co-relation queries the response was YES. [2023-08-26 17:14:03,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 215 events. 112/215 cut-off events. For 1757/1757 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 699 event pairs, 18 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 1327. Up to 92 conditions per place. [2023-08-26 17:14:03,058 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 53 selfloop transitions, 23 changer transitions 1/77 dead transitions. [2023-08-26 17:14:03,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 959 flow [2023-08-26 17:14:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 17:14:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 17:14:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 559 transitions. [2023-08-26 17:14:03,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093373493975905 [2023-08-26 17:14:03,059 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 559 transitions. [2023-08-26 17:14:03,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 559 transitions. [2023-08-26 17:14:03,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:03,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 559 transitions. [2023-08-26 17:14:03,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.875) internal successors, (559), 8 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:03,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 166.0) internal successors, (1494), 9 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:03,063 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 166.0) internal successors, (1494), 9 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:03,063 INFO L175 Difference]: Start difference. First operand has 82 places, 60 transitions, 742 flow. Second operand 8 states and 559 transitions. [2023-08-26 17:14:03,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 77 transitions, 959 flow [2023-08-26 17:14:03,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 933 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 17:14:03,070 INFO L231 Difference]: Finished difference. Result has 87 places, 57 transitions, 720 flow [2023-08-26 17:14:03,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=720, PETRI_PLACES=87, PETRI_TRANSITIONS=57} [2023-08-26 17:14:03,071 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 59 predicate places. [2023-08-26 17:14:03,071 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 57 transitions, 720 flow [2023-08-26 17:14:03,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:03,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:03,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:03,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 17:14:03,072 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:03,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:03,072 INFO L85 PathProgramCache]: Analyzing trace with hash 115872964, now seen corresponding path program 1 times [2023-08-26 17:14:03,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:03,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315297740] [2023-08-26 17:14:03,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:03,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:03,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:03,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315297740] [2023-08-26 17:14:03,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315297740] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:14:03,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757860586] [2023-08-26 17:14:03,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:03,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:03,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:14:03,193 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:14:03,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 17:14:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:03,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 17:14:03,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:14:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:03,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:14:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:03,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757860586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:14:03,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:14:03,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 17:14:03,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107488438] [2023-08-26 17:14:03,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:14:03,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 17:14:03,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:03,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 17:14:03,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-08-26 17:14:03,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 17:14:03,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 57 transitions, 720 flow. Second operand has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:03,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:03,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 17:14:03,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:04,000 INFO L124 PetriNetUnfolderBase]: 116/218 cut-off events. [2023-08-26 17:14:04,000 INFO L125 PetriNetUnfolderBase]: For 1797/1797 co-relation queries the response was YES. [2023-08-26 17:14:04,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 218 events. 116/218 cut-off events. For 1797/1797 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 708 event pairs, 2 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 1393. Up to 53 conditions per place. [2023-08-26 17:14:04,002 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 41 selfloop transitions, 21 changer transitions 26/88 dead transitions. [2023-08-26 17:14:04,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 88 transitions, 1070 flow [2023-08-26 17:14:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 17:14:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 17:14:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 741 transitions. [2023-08-26 17:14:04,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4058050383351588 [2023-08-26 17:14:04,004 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 741 transitions. [2023-08-26 17:14:04,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 741 transitions. [2023-08-26 17:14:04,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:04,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 741 transitions. [2023-08-26 17:14:04,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 67.36363636363636) internal successors, (741), 11 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:04,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:04,009 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:04,009 INFO L175 Difference]: Start difference. First operand has 87 places, 57 transitions, 720 flow. Second operand 11 states and 741 transitions. [2023-08-26 17:14:04,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 88 transitions, 1070 flow [2023-08-26 17:14:04,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 88 transitions, 981 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-26 17:14:04,015 INFO L231 Difference]: Finished difference. Result has 91 places, 46 transitions, 551 flow [2023-08-26 17:14:04,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=551, PETRI_PLACES=91, PETRI_TRANSITIONS=46} [2023-08-26 17:14:04,016 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2023-08-26 17:14:04,016 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 46 transitions, 551 flow [2023-08-26 17:14:04,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:04,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:04,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:04,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 17:14:04,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:04,228 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:04,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:04,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1063352182, now seen corresponding path program 2 times [2023-08-26 17:14:04,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:04,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579565278] [2023-08-26 17:14:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:04,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:04,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:04,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579565278] [2023-08-26 17:14:04,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579565278] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:14:04,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363556244] [2023-08-26 17:14:04,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:14:04,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:04,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:14:04,349 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:14:04,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 17:14:04,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:14:04,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:14:04,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 17:14:04,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:14:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:04,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:14:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:04,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363556244] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:14:04,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:14:04,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 17:14:04,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218768284] [2023-08-26 17:14:04,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:14:04,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 17:14:04,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:04,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 17:14:04,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-08-26 17:14:04,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 17:14:04,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 46 transitions, 551 flow. Second operand has 18 states, 18 states have (on average 63.666666666666664) internal successors, (1146), 18 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:04,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:04,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 17:14:04,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:05,050 INFO L124 PetriNetUnfolderBase]: 90/178 cut-off events. [2023-08-26 17:14:05,051 INFO L125 PetriNetUnfolderBase]: For 1406/1406 co-relation queries the response was YES. [2023-08-26 17:14:05,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1109 conditions, 178 events. 90/178 cut-off events. For 1406/1406 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 541 event pairs, 2 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 1083. Up to 55 conditions per place. [2023-08-26 17:14:05,053 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 45 selfloop transitions, 26 changer transitions 9/80 dead transitions. [2023-08-26 17:14:05,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 80 transitions, 930 flow [2023-08-26 17:14:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 17:14:05,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 17:14:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 740 transitions. [2023-08-26 17:14:05,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40525739320920046 [2023-08-26 17:14:05,055 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 740 transitions. [2023-08-26 17:14:05,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 740 transitions. [2023-08-26 17:14:05,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:05,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 740 transitions. [2023-08-26 17:14:05,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 67.27272727272727) internal successors, (740), 11 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:05,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:05,061 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:05,061 INFO L175 Difference]: Start difference. First operand has 91 places, 46 transitions, 551 flow. Second operand 11 states and 740 transitions. [2023-08-26 17:14:05,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 80 transitions, 930 flow [2023-08-26 17:14:05,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 808 flow, removed 17 selfloop flow, removed 14 redundant places. [2023-08-26 17:14:05,067 INFO L231 Difference]: Finished difference. Result has 80 places, 49 transitions, 562 flow [2023-08-26 17:14:05,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=562, PETRI_PLACES=80, PETRI_TRANSITIONS=49} [2023-08-26 17:14:05,068 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 52 predicate places. [2023-08-26 17:14:05,068 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 49 transitions, 562 flow [2023-08-26 17:14:05,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.666666666666664) internal successors, (1146), 18 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:05,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:05,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:05,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 17:14:05,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-26 17:14:05,277 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:05,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:05,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1141077862, now seen corresponding path program 3 times [2023-08-26 17:14:05,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:05,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692866052] [2023-08-26 17:14:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:05,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:05,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:05,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692866052] [2023-08-26 17:14:05,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692866052] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:14:05,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68070920] [2023-08-26 17:14:05,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 17:14:05,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:05,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:14:05,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:14:05,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 17:14:05,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 17:14:05,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:14:05,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 17:14:05,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:14:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:05,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:14:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:05,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68070920] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:14:05,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:14:05,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 17:14:05,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361829499] [2023-08-26 17:14:05,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:14:05,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 17:14:05,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:05,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 17:14:05,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-26 17:14:05,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 17:14:05,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 49 transitions, 562 flow. Second operand has 18 states, 18 states have (on average 63.44444444444444) internal successors, (1142), 18 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:05,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:05,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 17:14:05,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:06,067 INFO L124 PetriNetUnfolderBase]: 84/173 cut-off events. [2023-08-26 17:14:06,067 INFO L125 PetriNetUnfolderBase]: For 927/927 co-relation queries the response was YES. [2023-08-26 17:14:06,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 173 events. 84/173 cut-off events. For 927/927 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 529 event pairs, 2 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 1009. Up to 55 conditions per place. [2023-08-26 17:14:06,069 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 33 selfloop transitions, 15 changer transitions 26/74 dead transitions. [2023-08-26 17:14:06,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 74 transitions, 835 flow [2023-08-26 17:14:06,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 17:14:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 17:14:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 734 transitions. [2023-08-26 17:14:06,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019715224534502 [2023-08-26 17:14:06,071 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 734 transitions. [2023-08-26 17:14:06,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 734 transitions. [2023-08-26 17:14:06,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:06,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 734 transitions. [2023-08-26 17:14:06,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 66.72727272727273) internal successors, (734), 11 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:06,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:06,075 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:06,075 INFO L175 Difference]: Start difference. First operand has 80 places, 49 transitions, 562 flow. Second operand 11 states and 734 transitions. [2023-08-26 17:14:06,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 74 transitions, 835 flow [2023-08-26 17:14:06,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 74 transitions, 778 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-08-26 17:14:06,080 INFO L231 Difference]: Finished difference. Result has 82 places, 37 transitions, 388 flow [2023-08-26 17:14:06,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=388, PETRI_PLACES=82, PETRI_TRANSITIONS=37} [2023-08-26 17:14:06,081 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2023-08-26 17:14:06,081 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 37 transitions, 388 flow [2023-08-26 17:14:06,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.44444444444444) internal successors, (1142), 18 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:06,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:06,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:06,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 17:14:06,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:06,288 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:06,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:06,289 INFO L85 PathProgramCache]: Analyzing trace with hash 919791846, now seen corresponding path program 4 times [2023-08-26 17:14:06,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:06,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388444011] [2023-08-26 17:14:06,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:06,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:06,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:06,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388444011] [2023-08-26 17:14:06,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388444011] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:14:06,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979879147] [2023-08-26 17:14:06,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:14:06,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:06,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:14:06,412 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:14:06,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 17:14:06,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:14:06,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:14:06,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 17:14:06,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:14:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:06,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:14:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:06,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979879147] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:14:06,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:14:06,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-26 17:14:06,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585225106] [2023-08-26 17:14:06,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:14:06,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 17:14:06,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:06,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 17:14:06,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-08-26 17:14:06,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 17:14:06,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 37 transitions, 388 flow. Second operand has 16 states, 16 states have (on average 63.75) internal successors, (1020), 16 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:06,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:06,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 17:14:06,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:07,541 INFO L124 PetriNetUnfolderBase]: 81/184 cut-off events. [2023-08-26 17:14:07,541 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2023-08-26 17:14:07,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 184 events. 81/184 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 643 event pairs, 3 based on Foata normal form. 4/188 useless extension candidates. Maximal degree in co-relation 1007. Up to 39 conditions per place. [2023-08-26 17:14:07,543 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 41 selfloop transitions, 29 changer transitions 25/95 dead transitions. [2023-08-26 17:14:07,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 95 transitions, 958 flow [2023-08-26 17:14:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-26 17:14:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-26 17:14:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1327 transitions. [2023-08-26 17:14:07,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3996987951807229 [2023-08-26 17:14:07,546 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1327 transitions. [2023-08-26 17:14:07,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1327 transitions. [2023-08-26 17:14:07,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:07,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1327 transitions. [2023-08-26 17:14:07,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 66.35) internal successors, (1327), 20 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:07,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 166.0) internal successors, (3486), 21 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:07,552 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 166.0) internal successors, (3486), 21 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:07,552 INFO L175 Difference]: Start difference. First operand has 82 places, 37 transitions, 388 flow. Second operand 20 states and 1327 transitions. [2023-08-26 17:14:07,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 95 transitions, 958 flow [2023-08-26 17:14:07,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 95 transitions, 848 flow, removed 7 selfloop flow, removed 11 redundant places. [2023-08-26 17:14:07,558 INFO L231 Difference]: Finished difference. Result has 90 places, 48 transitions, 541 flow [2023-08-26 17:14:07,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=541, PETRI_PLACES=90, PETRI_TRANSITIONS=48} [2023-08-26 17:14:07,558 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2023-08-26 17:14:07,558 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 48 transitions, 541 flow [2023-08-26 17:14:07,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.75) internal successors, (1020), 16 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:07,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:07,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:07,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 17:14:07,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:07,765 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:07,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:07,765 INFO L85 PathProgramCache]: Analyzing trace with hash 997517526, now seen corresponding path program 5 times [2023-08-26 17:14:07,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:07,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008655449] [2023-08-26 17:14:07,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:07,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:07,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:07,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008655449] [2023-08-26 17:14:07,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008655449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:14:07,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217489598] [2023-08-26 17:14:07,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 17:14:07,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:07,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:14:07,943 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:14:07,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 17:14:08,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:14:08,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:14:08,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-26 17:14:08,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:14:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:08,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:14:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:08,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217489598] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:14:08,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:14:08,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2023-08-26 17:14:08,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961363978] [2023-08-26 17:14:08,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:14:08,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 17:14:08,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:08,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 17:14:08,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-26 17:14:08,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 166 [2023-08-26 17:14:08,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 48 transitions, 541 flow. Second operand has 16 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:08,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:08,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 166 [2023-08-26 17:14:08,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:08,454 INFO L124 PetriNetUnfolderBase]: 67/151 cut-off events. [2023-08-26 17:14:08,454 INFO L125 PetriNetUnfolderBase]: For 709/709 co-relation queries the response was YES. [2023-08-26 17:14:08,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 151 events. 67/151 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 462 event pairs, 1 based on Foata normal form. 3/154 useless extension candidates. Maximal degree in co-relation 885. Up to 45 conditions per place. [2023-08-26 17:14:08,456 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 33 selfloop transitions, 19 changer transitions 17/69 dead transitions. [2023-08-26 17:14:08,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 69 transitions, 780 flow [2023-08-26 17:14:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 17:14:08,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 17:14:08,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 712 transitions. [2023-08-26 17:14:08,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.357429718875502 [2023-08-26 17:14:08,458 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 712 transitions. [2023-08-26 17:14:08,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 712 transitions. [2023-08-26 17:14:08,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:08,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 712 transitions. [2023-08-26 17:14:08,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 59.333333333333336) internal successors, (712), 12 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:08,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 166.0) internal successors, (2158), 13 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:08,462 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 166.0) internal successors, (2158), 13 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:08,462 INFO L175 Difference]: Start difference. First operand has 90 places, 48 transitions, 541 flow. Second operand 12 states and 712 transitions. [2023-08-26 17:14:08,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 69 transitions, 780 flow [2023-08-26 17:14:08,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 69 transitions, 663 flow, removed 32 selfloop flow, removed 10 redundant places. [2023-08-26 17:14:08,467 INFO L231 Difference]: Finished difference. Result has 88 places, 38 transitions, 365 flow [2023-08-26 17:14:08,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=365, PETRI_PLACES=88, PETRI_TRANSITIONS=38} [2023-08-26 17:14:08,468 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 60 predicate places. [2023-08-26 17:14:08,468 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 38 transitions, 365 flow [2023-08-26 17:14:08,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:08,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:08,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:08,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 17:14:08,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 17:14:08,674 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:08,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:08,675 INFO L85 PathProgramCache]: Analyzing trace with hash -719636888, now seen corresponding path program 6 times [2023-08-26 17:14:08,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:08,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060704353] [2023-08-26 17:14:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:08,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:08,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:08,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060704353] [2023-08-26 17:14:08,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060704353] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:14:08,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96067242] [2023-08-26 17:14:08,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 17:14:08,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:08,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:14:08,792 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:14:08,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 17:14:08,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 17:14:08,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:14:08,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 17:14:08,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:14:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:08,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:14:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:09,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96067242] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:14:09,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:14:09,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-26 17:14:09,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835170894] [2023-08-26 17:14:09,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:14:09,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 17:14:09,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:09,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 17:14:09,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-08-26 17:14:09,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 17:14:09,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 38 transitions, 365 flow. Second operand has 15 states, 15 states have (on average 63.53333333333333) internal successors, (953), 15 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:09,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:09,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 17:14:09,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:09,554 INFO L124 PetriNetUnfolderBase]: 54/122 cut-off events. [2023-08-26 17:14:09,554 INFO L125 PetriNetUnfolderBase]: For 611/611 co-relation queries the response was YES. [2023-08-26 17:14:09,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 698 conditions, 122 events. 54/122 cut-off events. For 611/611 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 341 event pairs, 1 based on Foata normal form. 1/123 useless extension candidates. Maximal degree in co-relation 675. Up to 27 conditions per place. [2023-08-26 17:14:09,556 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 31 selfloop transitions, 23 changer transitions 11/65 dead transitions. [2023-08-26 17:14:09,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 65 transitions, 642 flow [2023-08-26 17:14:09,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 17:14:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 17:14:09,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 987 transitions. [2023-08-26 17:14:09,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963855421686747 [2023-08-26 17:14:09,559 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 987 transitions. [2023-08-26 17:14:09,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 987 transitions. [2023-08-26 17:14:09,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:09,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 987 transitions. [2023-08-26 17:14:09,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 65.8) internal successors, (987), 15 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:09,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 166.0) internal successors, (2656), 16 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:09,565 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 166.0) internal successors, (2656), 16 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:09,565 INFO L175 Difference]: Start difference. First operand has 88 places, 38 transitions, 365 flow. Second operand 15 states and 987 transitions. [2023-08-26 17:14:09,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 65 transitions, 642 flow [2023-08-26 17:14:09,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 65 transitions, 559 flow, removed 17 selfloop flow, removed 15 redundant places. [2023-08-26 17:14:09,569 INFO L231 Difference]: Finished difference. Result has 82 places, 38 transitions, 360 flow [2023-08-26 17:14:09,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=360, PETRI_PLACES=82, PETRI_TRANSITIONS=38} [2023-08-26 17:14:09,569 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2023-08-26 17:14:09,570 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 38 transitions, 360 flow [2023-08-26 17:14:09,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.53333333333333) internal successors, (953), 15 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:09,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:09,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:09,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 17:14:09,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 17:14:09,775 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:09,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:09,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1440037870, now seen corresponding path program 7 times [2023-08-26 17:14:09,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:09,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982076423] [2023-08-26 17:14:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:09,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:09,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:09,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982076423] [2023-08-26 17:14:09,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982076423] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:14:09,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315164032] [2023-08-26 17:14:09,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 17:14:09,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:09,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:14:09,887 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:14:09,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 17:14:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:09,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 17:14:09,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:14:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:10,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:14:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:10,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315164032] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:14:10,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:14:10,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 17:14:10,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528825482] [2023-08-26 17:14:10,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:14:10,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 17:14:10,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:10,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 17:14:10,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-08-26 17:14:10,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 166 [2023-08-26 17:14:10,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 38 transitions, 360 flow. Second operand has 18 states, 18 states have (on average 63.44444444444444) internal successors, (1142), 18 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:10,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:10,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 166 [2023-08-26 17:14:10,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:10,552 INFO L124 PetriNetUnfolderBase]: 52/112 cut-off events. [2023-08-26 17:14:10,552 INFO L125 PetriNetUnfolderBase]: For 477/477 co-relation queries the response was YES. [2023-08-26 17:14:10,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 112 events. 52/112 cut-off events. For 477/477 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 283 event pairs, 3 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 610. Up to 32 conditions per place. [2023-08-26 17:14:10,553 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 25 selfloop transitions, 11 changer transitions 20/56 dead transitions. [2023-08-26 17:14:10,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 56 transitions, 561 flow [2023-08-26 17:14:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 17:14:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 17:14:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 724 transitions. [2023-08-26 17:14:10,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964950711938664 [2023-08-26 17:14:10,554 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 724 transitions. [2023-08-26 17:14:10,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 724 transitions. [2023-08-26 17:14:10,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:10,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 724 transitions. [2023-08-26 17:14:10,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 65.81818181818181) internal successors, (724), 11 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:10,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:10,558 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:10,558 INFO L175 Difference]: Start difference. First operand has 82 places, 38 transitions, 360 flow. Second operand 11 states and 724 transitions. [2023-08-26 17:14:10,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 56 transitions, 561 flow [2023-08-26 17:14:10,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 56 transitions, 514 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-08-26 17:14:10,561 INFO L231 Difference]: Finished difference. Result has 83 places, 28 transitions, 251 flow [2023-08-26 17:14:10,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=251, PETRI_PLACES=83, PETRI_TRANSITIONS=28} [2023-08-26 17:14:10,562 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 55 predicate places. [2023-08-26 17:14:10,562 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 28 transitions, 251 flow [2023-08-26 17:14:10,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.44444444444444) internal successors, (1142), 18 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:10,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:14:10,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:14:10,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-26 17:14:10,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-26 17:14:10,768 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:14:10,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:14:10,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1997071242, now seen corresponding path program 8 times [2023-08-26 17:14:10,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:14:10,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819665619] [2023-08-26 17:14:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:14:10,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:14:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:14:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:10,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:14:10,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819665619] [2023-08-26 17:14:10,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819665619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:14:10,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870281247] [2023-08-26 17:14:10,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:14:10,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:14:10,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:14:10,931 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:14:10,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 17:14:11,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:14:11,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:14:11,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 17:14:11,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:14:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:11,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:14:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:14:11,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870281247] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:14:11,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:14:11,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2023-08-26 17:14:11,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170200932] [2023-08-26 17:14:11,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:14:11,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 17:14:11,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:14:11,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 17:14:11,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-08-26 17:14:11,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 166 [2023-08-26 17:14:11,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 28 transitions, 251 flow. Second operand has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:11,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:14:11,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 166 [2023-08-26 17:14:11,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:14:11,457 INFO L124 PetriNetUnfolderBase]: 34/74 cut-off events. [2023-08-26 17:14:11,457 INFO L125 PetriNetUnfolderBase]: For 367/367 co-relation queries the response was YES. [2023-08-26 17:14:11,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 74 events. 34/74 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 150 event pairs, 3 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 393. Up to 23 conditions per place. [2023-08-26 17:14:11,458 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 0 selfloop transitions, 0 changer transitions 36/36 dead transitions. [2023-08-26 17:14:11,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 36 transitions, 350 flow [2023-08-26 17:14:11,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 17:14:11,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 17:14:11,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2023-08-26 17:14:11,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507362784471218 [2023-08-26 17:14:11,459 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2023-08-26 17:14:11,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2023-08-26 17:14:11,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:14:11,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2023-08-26 17:14:11,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:11,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 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 17:14:11,462 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 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 17:14:11,463 INFO L175 Difference]: Start difference. First operand has 83 places, 28 transitions, 251 flow. Second operand 9 states and 524 transitions. [2023-08-26 17:14:11,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 36 transitions, 350 flow [2023-08-26 17:14:11,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 36 transitions, 305 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-08-26 17:14:11,465 INFO L231 Difference]: Finished difference. Result has 65 places, 0 transitions, 0 flow [2023-08-26 17:14:11,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=57, 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=65, PETRI_TRANSITIONS=0} [2023-08-26 17:14:11,465 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 37 predicate places. [2023-08-26 17:14:11,466 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 0 transitions, 0 flow [2023-08-26 17:14:11,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:14:11,468 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2023-08-26 17:14:11,468 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 17:14:11,468 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 17:14:11,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 17:14:11,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 17:14:11,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 17:14:11,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 17:14:11,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 17:14:11,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 17:14:11,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 17:14:11,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 17:14:11,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-26 17:14:11,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-26 17:14:11,675 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 5, 5, 1, 1, 1, 1, 1] [2023-08-26 17:14:11,677 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 17:14:11,678 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 17:14:11,680 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:14:11 BasicIcfg [2023-08-26 17:14:11,680 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 17:14:11,681 INFO L158 Benchmark]: Toolchain (without parser) took 17630.87ms. Allocated memory was 360.7MB in the beginning and 583.0MB in the end (delta: 222.3MB). Free memory was 337.3MB in the beginning and 439.2MB in the end (delta: -102.0MB). Peak memory consumption was 121.4MB. Max. memory is 16.0GB. [2023-08-26 17:14:11,681 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 360.7MB. Free memory is still 337.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:14:11,681 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.20ms. Allocated memory is still 360.7MB. Free memory was 337.3MB in the beginning and 326.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 17:14:11,681 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.00ms. Allocated memory is still 360.7MB. Free memory was 326.4MB in the beginning and 324.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:14:11,681 INFO L158 Benchmark]: Boogie Preprocessor took 33.77ms. Allocated memory is still 360.7MB. Free memory was 324.9MB in the beginning and 323.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:14:11,682 INFO L158 Benchmark]: RCFGBuilder took 409.05ms. Allocated memory is still 360.7MB. Free memory was 323.6MB in the beginning and 310.4MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 17:14:11,682 INFO L158 Benchmark]: TraceAbstraction took 16899.82ms. Allocated memory was 360.7MB in the beginning and 583.0MB in the end (delta: 222.3MB). Free memory was 309.5MB in the beginning and 439.2MB in the end (delta: -129.7MB). Peak memory consumption was 94.1MB. Max. memory is 16.0GB. [2023-08-26 17:14:11,683 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 360.7MB. Free memory is still 337.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 243.20ms. Allocated memory is still 360.7MB. Free memory was 337.3MB in the beginning and 326.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 38.00ms. Allocated memory is still 360.7MB. Free memory was 326.4MB in the beginning and 324.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.77ms. Allocated memory is still 360.7MB. Free memory was 324.9MB in the beginning and 323.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 409.05ms. Allocated memory is still 360.7MB. Free memory was 323.6MB in the beginning and 310.4MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 16899.82ms. Allocated memory was 360.7MB in the beginning and 583.0MB in the end (delta: 222.3MB). Free memory was 309.5MB in the beginning and 439.2MB in the end (delta: -129.7MB). Peak memory consumption was 94.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 80 PlacesBefore, 28 PlacesAfterwards, 79 TransitionsBefore, 23 TransitionsAfterwards, 748 CoEnabledTransitionPairs, 6 FixpointIterations, 39 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 76 TotalNumberOfCompositions, 780 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 764, independent: 752, independent conditional: 0, independent unconditional: 752, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 381, independent: 379, independent conditional: 0, independent unconditional: 379, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 764, independent: 373, independent conditional: 0, independent unconditional: 373, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 381, unknown conditional: 0, unknown unconditional: 381] , Statistics on independence cache: Total cache size (in pairs): 29, Positive cache size: 28, Positive conditional cache size: 0, Positive unconditional cache size: 28, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, 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: 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 5 procedures, 107 locations, 11 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: 16.7s, OverallIterations: 29, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 864 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 864 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 158 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4522 IncrementalHoareTripleChecker+Invalid, 4680 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 158 mSolverCounterUnsat, 0 mSDtfsCounter, 4522 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 561 GetRequests, 243 SyntacticMatches, 27 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=792occurred in iteration=17, InterpolantAutomatonStates: 220, 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, 0.5s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 517 NumberOfCodeBlocks, 517 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 628 ConstructedInterpolants, 0 QuantifiedInterpolants, 3864 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1443 ConjunctsInSsa, 155 ConjunctsInUnsatCore, 51 InterpolantComputations, 21 PerfectInterpolantSequences, 11/64 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 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 17:14:11,699 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...