/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/test-easy6.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:20:50,023 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:20:50,081 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 20:20:50,083 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:20:50,084 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:20:50,099 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:20:50,100 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:20:50,100 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:20:50,100 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:20:50,101 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:20:50,101 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:20:50,101 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:20:50,101 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:20:50,102 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:20:50,102 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:20:50,102 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:20:50,102 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:20:50,102 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:20:50,103 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:20:50,103 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:20:50,103 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:20:50,103 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:20:50,104 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:20:50,104 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:20:50,106 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:20:50,106 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:20:50,106 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:20:50,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:20:50,107 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:20:50,107 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:20:50,107 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:20:50,107 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:20:50,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:20:50,108 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:20:50,108 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:20:50,108 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 20:20:50,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:20:50,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:20:50,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:20:50,363 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:20:50,365 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:20:50,366 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy6.wvr.c [2023-08-26 20:20:51,285 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:20:51,424 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:20:51,424 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy6.wvr.c [2023-08-26 20:20:51,431 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a3bbbc7e/4fa52c3992d04bc5b69fd4e7a1f6cdd2/FLAGc3cb9b5ec [2023-08-26 20:20:51,442 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a3bbbc7e/4fa52c3992d04bc5b69fd4e7a1f6cdd2 [2023-08-26 20:20:51,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:20:51,447 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:20:51,449 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:20:51,449 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:20:51,451 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:20:51,452 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:20:51" (1/1) ... [2023-08-26 20:20:51,453 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1451511b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:51, skipping insertion in model container [2023-08-26 20:20:51,453 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:20:51" (1/1) ... [2023-08-26 20:20:51,471 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:20:51,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:20:51,601 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:20:51,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:20:51,624 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:20:51,624 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:20:51,628 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:20:51,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:51 WrapperNode [2023-08-26 20:20:51,629 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:20:51,630 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:20:51,630 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:20:51,630 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:20:51,634 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:51" (1/1) ... [2023-08-26 20:20:51,638 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:51" (1/1) ... [2023-08-26 20:20:51,654 INFO L138 Inliner]: procedures = 21, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 125 [2023-08-26 20:20:51,654 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:20:51,655 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:20:51,655 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:20:51,655 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:20:51,660 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:51" (1/1) ... [2023-08-26 20:20:51,660 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:51" (1/1) ... [2023-08-26 20:20:51,662 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:51" (1/1) ... [2023-08-26 20:20:51,662 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:51" (1/1) ... [2023-08-26 20:20:51,665 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:51" (1/1) ... [2023-08-26 20:20:51,666 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:51" (1/1) ... [2023-08-26 20:20:51,666 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:51" (1/1) ... [2023-08-26 20:20:51,667 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:51" (1/1) ... [2023-08-26 20:20:51,668 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:20:51,669 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:20:51,669 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:20:51,669 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:20:51,670 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:51" (1/1) ... [2023-08-26 20:20:51,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:20:51,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:51,690 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 20:20:51,692 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 20:20:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:20:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 20:20:51,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 20:20:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 20:20:51,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 20:20:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:20:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:20:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:20:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 20:20:51,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 20:20:51,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:20:51,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:20:51,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 20:20:51,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:20:51,729 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 20:20:51,812 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:20:51,813 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:20:51,958 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:20:51,985 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:20:51,985 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 20:20:51,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:20:51 BoogieIcfgContainer [2023-08-26 20:20:51,987 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:20:51,988 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:20:51,988 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:20:51,990 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:20:51,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:20:51" (1/3) ... [2023-08-26 20:20:51,991 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1025b23a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:20:51, skipping insertion in model container [2023-08-26 20:20:51,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:51" (2/3) ... [2023-08-26 20:20:51,991 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1025b23a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:20:51, skipping insertion in model container [2023-08-26 20:20:51,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:20:51" (3/3) ... [2023-08-26 20:20:51,992 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy6.wvr.c [2023-08-26 20:20:52,003 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:20:52,003 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 20:20:52,003 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:20:52,067 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 20:20:52,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 87 transitions, 190 flow [2023-08-26 20:20:52,145 INFO L124 PetriNetUnfolderBase]: 1/85 cut-off events. [2023-08-26 20:20:52,146 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:20:52,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 1/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-08-26 20:20:52,150 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 87 transitions, 190 flow [2023-08-26 20:20:52,153 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 76 transitions, 164 flow [2023-08-26 20:20:52,155 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:20:52,164 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 76 transitions, 164 flow [2023-08-26 20:20:52,166 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 76 transitions, 164 flow [2023-08-26 20:20:52,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 76 transitions, 164 flow [2023-08-26 20:20:52,190 INFO L124 PetriNetUnfolderBase]: 1/76 cut-off events. [2023-08-26 20:20:52,190 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:20:52,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 76 events. 1/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-08-26 20:20:52,192 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-08-26 20:20:53,776 INFO L134 LiptonReduction]: Checked pairs total: 4098 [2023-08-26 20:20:53,776 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-26 20:20:53,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:20:53,789 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;@51e467d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:20:53,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 20:20:53,790 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:20:53,790 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 20:20:53,790 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:20:53,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:53,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 20:20:53,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:53,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:53,794 INFO L85 PathProgramCache]: Analyzing trace with hash 358, now seen corresponding path program 1 times [2023-08-26 20:20:53,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:53,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750168571] [2023-08-26 20:20:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:53,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:53,859 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 20:20:53,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:53,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750168571] [2023-08-26 20:20:53,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750168571] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:53,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:53,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 20:20:53,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869520705] [2023-08-26 20:20:53,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:53,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 20:20:53,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:53,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 20:20:53,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 20:20:53,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 147 [2023-08-26 20:20:53,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:53,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:53,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 147 [2023-08-26 20:20:53,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:53,969 INFO L124 PetriNetUnfolderBase]: 105/272 cut-off events. [2023-08-26 20:20:53,969 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 20:20:53,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 272 events. 105/272 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1354 event pairs, 105 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 420. Up to 205 conditions per place. [2023-08-26 20:20:53,974 INFO L140 encePairwiseOnDemand]: 145/147 looper letters, 21 selfloop transitions, 0 changer transitions 0/33 dead transitions. [2023-08-26 20:20:53,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 120 flow [2023-08-26 20:20:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 20:20:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 20:20:53,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 177 transitions. [2023-08-26 20:20:53,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2023-08-26 20:20:53,984 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 177 transitions. [2023-08-26 20:20:53,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 177 transitions. [2023-08-26 20:20:53,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:53,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 177 transitions. [2023-08-26 20:20:53,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:53,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:53,995 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:53,996 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 82 flow. Second operand 2 states and 177 transitions. [2023-08-26 20:20:53,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 120 flow [2023-08-26 20:20:53,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 112 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 20:20:53,999 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 70 flow [2023-08-26 20:20:54,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-08-26 20:20:54,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-08-26 20:20:54,004 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 70 flow [2023-08-26 20:20:54,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:54,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:20:54,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 20:20:54,005 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 20:20:54,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:54,011 INFO L85 PathProgramCache]: Analyzing trace with hash 351635, now seen corresponding path program 1 times [2023-08-26 20:20:54,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:54,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066396340] [2023-08-26 20:20:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:54,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:54,126 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 20:20:54,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:54,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066396340] [2023-08-26 20:20:54,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066396340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:54,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:54,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:54,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643303522] [2023-08-26 20:20:54,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:54,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:54,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:54,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:54,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:54,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 147 [2023-08-26 20:20:54,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:54,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 147 [2023-08-26 20:20:54,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:54,167 INFO L124 PetriNetUnfolderBase]: 99/256 cut-off events. [2023-08-26 20:20:54,168 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:20:54,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 256 events. 99/256 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1257 event pairs, 99 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 451. Up to 190 conditions per place. [2023-08-26 20:20:54,169 INFO L140 encePairwiseOnDemand]: 144/147 looper letters, 18 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-26 20:20:54,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 104 flow [2023-08-26 20:20:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:54,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2023-08-26 20:20:54,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2023-08-26 20:20:54,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 195 transitions. [2023-08-26 20:20:54,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 195 transitions. [2023-08-26 20:20:54,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:54,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 195 transitions. [2023-08-26 20:20:54,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 20:20:54,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,173 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 70 flow. Second operand 3 states and 195 transitions. [2023-08-26 20:20:54,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 104 flow [2023-08-26 20:20:54,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 104 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:20:54,174 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 68 flow [2023-08-26 20:20:54,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-08-26 20:20:54,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-08-26 20:20:54,175 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 68 flow [2023-08-26 20:20:54,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:54,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:20:54,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 20:20:54,176 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 20:20:54,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash 351636, now seen corresponding path program 1 times [2023-08-26 20:20:54,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:54,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280700777] [2023-08-26 20:20:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:54,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:54,245 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 20:20:54,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:54,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280700777] [2023-08-26 20:20:54,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280700777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:54,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:54,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:54,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768351071] [2023-08-26 20:20:54,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:54,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:54,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:54,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:54,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:54,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-26 20:20:54,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:54,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-26 20:20:54,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:54,286 INFO L124 PetriNetUnfolderBase]: 93/240 cut-off events. [2023-08-26 20:20:54,286 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:20:54,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 240 events. 93/240 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1165 event pairs, 93 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 422. Up to 176 conditions per place. [2023-08-26 20:20:54,288 INFO L140 encePairwiseOnDemand]: 144/147 looper letters, 16 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-26 20:20:54,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 98 flow [2023-08-26 20:20:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:54,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2023-08-26 20:20:54,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512471655328798 [2023-08-26 20:20:54,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2023-08-26 20:20:54,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2023-08-26 20:20:54,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:54,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2023-08-26 20:20:54,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,291 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 68 flow. Second operand 3 states and 199 transitions. [2023-08-26 20:20:54,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 98 flow [2023-08-26 20:20:54,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 97 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:54,292 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 65 flow [2023-08-26 20:20:54,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-26 20:20:54,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-08-26 20:20:54,293 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 65 flow [2023-08-26 20:20:54,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:54,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:20:54,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 20:20:54,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:54,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:54,294 INFO L85 PathProgramCache]: Analyzing trace with hash 337928765, now seen corresponding path program 1 times [2023-08-26 20:20:54,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:54,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654058549] [2023-08-26 20:20:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:54,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:54,395 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 20:20:54,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:54,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654058549] [2023-08-26 20:20:54,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654058549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:54,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:54,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:20:54,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219708226] [2023-08-26 20:20:54,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:54,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:20:54,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:54,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:20:54,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:20:54,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 147 [2023-08-26 20:20:54,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:54,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 147 [2023-08-26 20:20:54,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:54,426 INFO L124 PetriNetUnfolderBase]: 69/188 cut-off events. [2023-08-26 20:20:54,426 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:20:54,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 188 events. 69/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 801 event pairs, 69 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 331. Up to 136 conditions per place. [2023-08-26 20:20:54,427 INFO L140 encePairwiseOnDemand]: 145/147 looper letters, 15 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-26 20:20:54,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 28 transitions, 95 flow [2023-08-26 20:20:54,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-08-26 20:20:54,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41950113378684806 [2023-08-26 20:20:54,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-08-26 20:20:54,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-08-26 20:20:54,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:54,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-08-26 20:20:54,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 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 20:20:54,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,431 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 65 flow. Second operand 3 states and 185 transitions. [2023-08-26 20:20:54,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 28 transitions, 95 flow [2023-08-26 20:20:54,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:54,431 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 64 flow [2023-08-26 20:20:54,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-08-26 20:20:54,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-08-26 20:20:54,432 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 64 flow [2023-08-26 20:20:54,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:54,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:20:54,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 20:20:54,433 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:20:54,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:54,433 INFO L85 PathProgramCache]: Analyzing trace with hash 337928764, now seen corresponding path program 1 times [2023-08-26 20:20:54,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:54,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457386520] [2023-08-26 20:20:54,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:54,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:54,477 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 20:20:54,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:54,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457386520] [2023-08-26 20:20:54,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457386520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:54,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:54,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:20:54,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665548428] [2023-08-26 20:20:54,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:54,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:20:54,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:54,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:20:54,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:20:54,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 147 [2023-08-26 20:20:54,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:54,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 147 [2023-08-26 20:20:54,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:54,510 INFO L124 PetriNetUnfolderBase]: 45/136 cut-off events. [2023-08-26 20:20:54,510 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:20:54,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 136 events. 45/136 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 519 event pairs, 45 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 240. Up to 96 conditions per place. [2023-08-26 20:20:54,516 INFO L140 encePairwiseOnDemand]: 145/147 looper letters, 14 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-26 20:20:54,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 27 transitions, 92 flow [2023-08-26 20:20:54,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2023-08-26 20:20:54,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41043083900226757 [2023-08-26 20:20:54,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 181 transitions. [2023-08-26 20:20:54,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 181 transitions. [2023-08-26 20:20:54,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:54,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 181 transitions. [2023-08-26 20:20:54,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,519 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,519 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 64 flow. Second operand 3 states and 181 transitions. [2023-08-26 20:20:54,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 27 transitions, 92 flow [2023-08-26 20:20:54,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:54,520 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 63 flow [2023-08-26 20:20:54,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-26 20:20:54,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-08-26 20:20:54,521 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 63 flow [2023-08-26 20:20:54,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:54,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:54,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 20:20:54,521 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 20:20:54,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash -182924737, now seen corresponding path program 1 times [2023-08-26 20:20:54,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:54,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533126685] [2023-08-26 20:20:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:54,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:54,700 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 20:20:54,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:54,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533126685] [2023-08-26 20:20:54,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533126685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:54,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:54,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:20:54,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256581] [2023-08-26 20:20:54,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:54,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 20:20:54,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:54,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 20:20:54,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:20:54,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 147 [2023-08-26 20:20:54,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 63 flow. Second operand has 7 states, 7 states have (on average 71.71428571428571) internal successors, (502), 7 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:54,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 147 [2023-08-26 20:20:54,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:54,829 INFO L124 PetriNetUnfolderBase]: 133/295 cut-off events. [2023-08-26 20:20:54,830 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 20:20:54,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 295 events. 133/295 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1177 event pairs, 39 based on Foata normal form. 1/287 useless extension candidates. Maximal degree in co-relation 589. Up to 80 conditions per place. [2023-08-26 20:20:54,832 INFO L140 encePairwiseOnDemand]: 141/147 looper letters, 34 selfloop transitions, 6 changer transitions 16/64 dead transitions. [2023-08-26 20:20:54,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 64 transitions, 257 flow [2023-08-26 20:20:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:20:54,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:20:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 540 transitions. [2023-08-26 20:20:54,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247813411078717 [2023-08-26 20:20:54,834 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 540 transitions. [2023-08-26 20:20:54,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 540 transitions. [2023-08-26 20:20:54,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:54,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 540 transitions. [2023-08-26 20:20:54,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.14285714285714) internal successors, (540), 7 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,838 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,838 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 63 flow. Second operand 7 states and 540 transitions. [2023-08-26 20:20:54,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 64 transitions, 257 flow [2023-08-26 20:20:54,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:54,839 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 97 flow [2023-08-26 20:20:54,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=97, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2023-08-26 20:20:54,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-26 20:20:54,844 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 97 flow [2023-08-26 20:20:54,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.71428571428571) internal successors, (502), 7 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:54,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:54,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 20:20:54,845 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 20:20:54,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:54,845 INFO L85 PathProgramCache]: Analyzing trace with hash 181207167, now seen corresponding path program 2 times [2023-08-26 20:20:54,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:54,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699693717] [2023-08-26 20:20:54,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:54,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:54,972 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 20:20:54,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:54,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699693717] [2023-08-26 20:20:54,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699693717] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:54,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:54,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 20:20:54,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710637672] [2023-08-26 20:20:54,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:54,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 20:20:54,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:54,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 20:20:54,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:20:54,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 147 [2023-08-26 20:20:54,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 97 flow. Second operand has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:54,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:54,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 147 [2023-08-26 20:20:54,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:55,099 INFO L124 PetriNetUnfolderBase]: 204/536 cut-off events. [2023-08-26 20:20:55,100 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-26 20:20:55,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 536 events. 204/536 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2916 event pairs, 22 based on Foata normal form. 6/535 useless extension candidates. Maximal degree in co-relation 1067. Up to 91 conditions per place. [2023-08-26 20:20:55,102 INFO L140 encePairwiseOnDemand]: 139/147 looper letters, 41 selfloop transitions, 11 changer transitions 13/77 dead transitions. [2023-08-26 20:20:55,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 326 flow [2023-08-26 20:20:55,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 20:20:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 20:20:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 669 transitions. [2023-08-26 20:20:55,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056689342403629 [2023-08-26 20:20:55,103 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 669 transitions. [2023-08-26 20:20:55,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 669 transitions. [2023-08-26 20:20:55,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:55,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 669 transitions. [2023-08-26 20:20:55,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 74.33333333333333) internal successors, (669), 9 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 147.0) internal successors, (1470), 10 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,106 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 147.0) internal successors, (1470), 10 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,106 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 97 flow. Second operand 9 states and 669 transitions. [2023-08-26 20:20:55,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 326 flow [2023-08-26 20:20:55,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 322 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:55,109 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 169 flow [2023-08-26 20:20:55,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=169, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2023-08-26 20:20:55,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-08-26 20:20:55,109 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 169 flow [2023-08-26 20:20:55,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:55,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:55,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 20:20:55,110 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 20:20:55,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:55,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1810537695, now seen corresponding path program 3 times [2023-08-26 20:20:55,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:55,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619191395] [2023-08-26 20:20:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:55,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:55,202 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 20:20:55,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:55,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619191395] [2023-08-26 20:20:55,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619191395] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:55,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:55,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 20:20:55,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726376022] [2023-08-26 20:20:55,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:55,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 20:20:55,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:55,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 20:20:55,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:20:55,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 147 [2023-08-26 20:20:55,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 169 flow. Second operand has 7 states, 7 states have (on average 71.71428571428571) internal successors, (502), 7 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:55,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 147 [2023-08-26 20:20:55,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:55,317 INFO L124 PetriNetUnfolderBase]: 237/528 cut-off events. [2023-08-26 20:20:55,317 INFO L125 PetriNetUnfolderBase]: For 375/379 co-relation queries the response was YES. [2023-08-26 20:20:55,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 528 events. 237/528 cut-off events. For 375/379 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2520 event pairs, 86 based on Foata normal form. 4/517 useless extension candidates. Maximal degree in co-relation 1462. Up to 161 conditions per place. [2023-08-26 20:20:55,319 INFO L140 encePairwiseOnDemand]: 142/147 looper letters, 32 selfloop transitions, 5 changer transitions 21/70 dead transitions. [2023-08-26 20:20:55,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 70 transitions, 412 flow [2023-08-26 20:20:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:20:55,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:20:55,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 529 transitions. [2023-08-26 20:20:55,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5140913508260447 [2023-08-26 20:20:55,321 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 529 transitions. [2023-08-26 20:20:55,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 529 transitions. [2023-08-26 20:20:55,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:55,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 529 transitions. [2023-08-26 20:20:55,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 75.57142857142857) internal successors, (529), 7 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,323 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,323 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 169 flow. Second operand 7 states and 529 transitions. [2023-08-26 20:20:55,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 70 transitions, 412 flow [2023-08-26 20:20:55,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 406 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:55,326 INFO L231 Difference]: Finished difference. Result has 59 places, 37 transitions, 170 flow [2023-08-26 20:20:55,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=170, PETRI_PLACES=59, PETRI_TRANSITIONS=37} [2023-08-26 20:20:55,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2023-08-26 20:20:55,327 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 37 transitions, 170 flow [2023-08-26 20:20:55,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.71428571428571) internal successors, (502), 7 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:55,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:55,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 20:20:55,328 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 20:20:55,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:55,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1793051831, now seen corresponding path program 4 times [2023-08-26 20:20:55,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:55,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386478896] [2023-08-26 20:20:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:55,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:55,437 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 20:20:55,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:55,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386478896] [2023-08-26 20:20:55,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386478896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:55,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:55,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 20:20:55,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081155398] [2023-08-26 20:20:55,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:55,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 20:20:55,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:55,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 20:20:55,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:20:55,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 147 [2023-08-26 20:20:55,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 37 transitions, 170 flow. Second operand has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:55,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 147 [2023-08-26 20:20:55,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:55,575 INFO L124 PetriNetUnfolderBase]: 175/481 cut-off events. [2023-08-26 20:20:55,575 INFO L125 PetriNetUnfolderBase]: For 454/482 co-relation queries the response was YES. [2023-08-26 20:20:55,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1285 conditions, 481 events. 175/481 cut-off events. For 454/482 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2604 event pairs, 31 based on Foata normal form. 34/506 useless extension candidates. Maximal degree in co-relation 1271. Up to 132 conditions per place. [2023-08-26 20:20:55,577 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 38 selfloop transitions, 8 changer transitions 13/69 dead transitions. [2023-08-26 20:20:55,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 69 transitions, 376 flow [2023-08-26 20:20:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 20:20:55,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 20:20:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 596 transitions. [2023-08-26 20:20:55,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068027210884354 [2023-08-26 20:20:55,579 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 596 transitions. [2023-08-26 20:20:55,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 596 transitions. [2023-08-26 20:20:55,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:55,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 596 transitions. [2023-08-26 20:20:55,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.5) internal successors, (596), 8 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 147.0) internal successors, (1323), 9 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,582 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 147.0) internal successors, (1323), 9 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,582 INFO L175 Difference]: Start difference. First operand has 59 places, 37 transitions, 170 flow. Second operand 8 states and 596 transitions. [2023-08-26 20:20:55,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 69 transitions, 376 flow [2023-08-26 20:20:55,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 359 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-26 20:20:55,585 INFO L231 Difference]: Finished difference. Result has 59 places, 35 transitions, 163 flow [2023-08-26 20:20:55,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=163, PETRI_PLACES=59, PETRI_TRANSITIONS=35} [2023-08-26 20:20:55,586 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2023-08-26 20:20:55,586 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 35 transitions, 163 flow [2023-08-26 20:20:55,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:55,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:55,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 20:20:55,587 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 20:20:55,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:55,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1804956507, now seen corresponding path program 5 times [2023-08-26 20:20:55,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:55,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199884362] [2023-08-26 20:20:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:55,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:55,664 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 20:20:55,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:55,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199884362] [2023-08-26 20:20:55,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199884362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:55,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:55,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:20:55,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812922227] [2023-08-26 20:20:55,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:55,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:55,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:55,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:55,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:55,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 147 [2023-08-26 20:20:55,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 35 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:55,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 147 [2023-08-26 20:20:55,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:55,713 INFO L124 PetriNetUnfolderBase]: 116/351 cut-off events. [2023-08-26 20:20:55,713 INFO L125 PetriNetUnfolderBase]: For 424/438 co-relation queries the response was YES. [2023-08-26 20:20:55,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 351 events. 116/351 cut-off events. For 424/438 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1796 event pairs, 99 based on Foata normal form. 7/343 useless extension candidates. Maximal degree in co-relation 962. Up to 249 conditions per place. [2023-08-26 20:20:55,715 INFO L140 encePairwiseOnDemand]: 144/147 looper letters, 23 selfloop transitions, 2 changer transitions 2/41 dead transitions. [2023-08-26 20:20:55,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 41 transitions, 242 flow [2023-08-26 20:20:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:55,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-08-26 20:20:55,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-08-26 20:20:55,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-08-26 20:20:55,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-08-26 20:20:55,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:55,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-08-26 20:20:55,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 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 20:20:55,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,719 INFO L175 Difference]: Start difference. First operand has 59 places, 35 transitions, 163 flow. Second operand 3 states and 245 transitions. [2023-08-26 20:20:55,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 41 transitions, 242 flow [2023-08-26 20:20:55,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 41 transitions, 215 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-26 20:20:55,721 INFO L231 Difference]: Finished difference. Result has 54 places, 35 transitions, 148 flow [2023-08-26 20:20:55,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=54, PETRI_TRANSITIONS=35} [2023-08-26 20:20:55,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-08-26 20:20:55,722 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 35 transitions, 148 flow [2023-08-26 20:20:55,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:55,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:55,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 20:20:55,723 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 20:20:55,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:55,723 INFO L85 PathProgramCache]: Analyzing trace with hash 803760753, now seen corresponding path program 6 times [2023-08-26 20:20:55,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:55,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429370995] [2023-08-26 20:20:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:55,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:55,849 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 20:20:55,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:55,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429370995] [2023-08-26 20:20:55,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429370995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:55,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:55,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 20:20:55,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888195197] [2023-08-26 20:20:55,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:55,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 20:20:55,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:55,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 20:20:55,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:20:55,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 147 [2023-08-26 20:20:55,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 35 transitions, 148 flow. Second operand has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:55,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 147 [2023-08-26 20:20:55,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:55,941 INFO L124 PetriNetUnfolderBase]: 93/261 cut-off events. [2023-08-26 20:20:55,941 INFO L125 PetriNetUnfolderBase]: For 206/210 co-relation queries the response was YES. [2023-08-26 20:20:55,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 261 events. 93/261 cut-off events. For 206/210 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1130 event pairs, 31 based on Foata normal form. 10/265 useless extension candidates. Maximal degree in co-relation 700. Up to 130 conditions per place. [2023-08-26 20:20:55,943 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 20 selfloop transitions, 3 changer transitions 10/43 dead transitions. [2023-08-26 20:20:55,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 43 transitions, 230 flow [2023-08-26 20:20:55,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 20:20:55,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 20:20:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 369 transitions. [2023-08-26 20:20:55,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020408163265306 [2023-08-26 20:20:55,944 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 369 transitions. [2023-08-26 20:20:55,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 369 transitions. [2023-08-26 20:20:55,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:55,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 369 transitions. [2023-08-26 20:20:55,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,946 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,946 INFO L175 Difference]: Start difference. First operand has 54 places, 35 transitions, 148 flow. Second operand 5 states and 369 transitions. [2023-08-26 20:20:55,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 43 transitions, 230 flow [2023-08-26 20:20:55,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 43 transitions, 224 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 20:20:55,948 INFO L231 Difference]: Finished difference. Result has 55 places, 29 transitions, 117 flow [2023-08-26 20:20:55,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=29} [2023-08-26 20:20:55,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-08-26 20:20:55,948 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 29 transitions, 117 flow [2023-08-26 20:20:55,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:55,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:55,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:55,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 20:20:55,949 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 20:20:55,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:55,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2024020239, now seen corresponding path program 7 times [2023-08-26 20:20:55,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:55,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361066503] [2023-08-26 20:20:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:55,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:56,023 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 20:20:56,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:56,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361066503] [2023-08-26 20:20:56,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361066503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:56,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:56,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 20:20:56,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025283649] [2023-08-26 20:20:56,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:56,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 20:20:56,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:56,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 20:20:56,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 20:20:56,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 147 [2023-08-26 20:20:56,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 29 transitions, 117 flow. Second operand has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:56,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:56,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 147 [2023-08-26 20:20:56,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:56,073 INFO L124 PetriNetUnfolderBase]: 31/86 cut-off events. [2023-08-26 20:20:56,073 INFO L125 PetriNetUnfolderBase]: For 56/58 co-relation queries the response was YES. [2023-08-26 20:20:56,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 86 events. 31/86 cut-off events. For 56/58 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 243 event pairs, 2 based on Foata normal form. 8/94 useless extension candidates. Maximal degree in co-relation 242. Up to 26 conditions per place. [2023-08-26 20:20:56,074 INFO L140 encePairwiseOnDemand]: 141/147 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-08-26 20:20:56,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 30 transitions, 164 flow [2023-08-26 20:20:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 20:20:56,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 20:20:56,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 494 transitions. [2023-08-26 20:20:56,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4800777453838678 [2023-08-26 20:20:56,075 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 494 transitions. [2023-08-26 20:20:56,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 494 transitions. [2023-08-26 20:20:56,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:56,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 494 transitions. [2023-08-26 20:20:56,077 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 20:20:56,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:56,078 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:56,078 INFO L175 Difference]: Start difference. First operand has 55 places, 29 transitions, 117 flow. Second operand 7 states and 494 transitions. [2023-08-26 20:20:56,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 30 transitions, 164 flow [2023-08-26 20:20:56,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 129 flow, removed 11 selfloop flow, removed 10 redundant places. [2023-08-26 20:20:56,079 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-08-26 20:20:56,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-08-26 20:20:56,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-08-26 20:20:56,079 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-08-26 20:20:56,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:56,081 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2023-08-26 20:20:56,082 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 20:20:56,082 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 20:20:56,082 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 20:20:56,082 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 20:20:56,082 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 20:20:56,082 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 20:20:56,082 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 20:20:56,082 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 20:20:56,082 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 20:20:56,082 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 20:20:56,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 20:20:56,083 INFO L445 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1, 1, 1] [2023-08-26 20:20:56,084 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 20:20:56,085 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 20:20:56,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 08:20:56 BasicIcfg [2023-08-26 20:20:56,086 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 20:20:56,087 INFO L158 Benchmark]: Toolchain (without parser) took 4639.81ms. Allocated memory was 438.3MB in the beginning and 562.0MB in the end (delta: 123.7MB). Free memory was 394.3MB in the beginning and 219.9MB in the end (delta: 174.4MB). Peak memory consumption was 299.4MB. Max. memory is 16.0GB. [2023-08-26 20:20:56,087 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 438.3MB. Free memory was 415.5MB in the beginning and 415.5MB in the end (delta: 82.0kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 20:20:56,087 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.03ms. Allocated memory is still 438.3MB. Free memory was 394.0MB in the beginning and 383.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 20:20:56,087 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.85ms. Allocated memory is still 438.3MB. Free memory was 383.0MB in the beginning and 381.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:20:56,087 INFO L158 Benchmark]: Boogie Preprocessor took 13.62ms. Allocated memory is still 438.3MB. Free memory was 381.0MB in the beginning and 379.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:20:56,088 INFO L158 Benchmark]: RCFGBuilder took 318.20ms. Allocated memory is still 438.3MB. Free memory was 379.7MB in the beginning and 403.7MB in the end (delta: -24.0MB). Peak memory consumption was 9.0MB. Max. memory is 16.0GB. [2023-08-26 20:20:56,088 INFO L158 Benchmark]: TraceAbstraction took 4098.13ms. Allocated memory was 438.3MB in the beginning and 562.0MB in the end (delta: 123.7MB). Free memory was 402.7MB in the beginning and 219.9MB in the end (delta: 182.9MB). Peak memory consumption was 305.1MB. Max. memory is 16.0GB. [2023-08-26 20:20:56,089 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 438.3MB. Free memory was 415.5MB in the beginning and 415.5MB in the end (delta: 82.0kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 180.03ms. Allocated memory is still 438.3MB. Free memory was 394.0MB in the beginning and 383.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.85ms. Allocated memory is still 438.3MB. Free memory was 383.0MB in the beginning and 381.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 13.62ms. Allocated memory is still 438.3MB. Free memory was 381.0MB in the beginning and 379.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 318.20ms. Allocated memory is still 438.3MB. Free memory was 379.7MB in the beginning and 403.7MB in the end (delta: -24.0MB). Peak memory consumption was 9.0MB. Max. memory is 16.0GB. * TraceAbstraction took 4098.13ms. Allocated memory was 438.3MB in the beginning and 562.0MB in the end (delta: 123.7MB). Free memory was 402.7MB in the beginning and 219.9MB in the end (delta: 182.9MB). Peak memory consumption was 305.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 82 PlacesBefore, 42 PlacesAfterwards, 76 TransitionsBefore, 35 TransitionsAfterwards, 748 CoEnabledTransitionPairs, 5 FixpointIterations, 39 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 60 TotalNumberOfCompositions, 4098 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2067, independent: 1866, independent conditional: 0, independent unconditional: 1866, dependent: 201, dependent conditional: 0, dependent unconditional: 201, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 361, independent: 343, independent conditional: 0, independent unconditional: 343, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2067, independent: 1523, independent conditional: 0, independent unconditional: 1523, dependent: 183, dependent conditional: 0, dependent unconditional: 183, unknown: 361, unknown conditional: 0, unknown unconditional: 361] , Statistics on independence cache: Total cache size (in pairs): 148, Positive cache size: 135, Positive conditional cache size: 0, Positive unconditional cache size: 135, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, 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, 113 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: 4.0s, OverallIterations: 12, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 403 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 403 mSDsluCounter, 11 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 871 IncrementalHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 9 mSDtfsCounter, 871 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=8, InterpolantAutomatonStates: 60, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 206 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 194 ConstructedInterpolants, 0 QuantifiedInterpolants, 814 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 20:20:56,102 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...