/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:17:54,832 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:17:54,919 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 15:17:54,928 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:17:54,928 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:17:54,957 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:17:54,958 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:17:54,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:17:54,959 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:17:54,962 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:17:54,963 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:17:54,963 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:17:54,963 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:17:54,964 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:17:54,965 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:17:54,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:17:54,965 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:17:54,965 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:17:54,965 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:17:54,966 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:17:54,966 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:17:54,967 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:17:54,967 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:17:54,967 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:17:54,968 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:17:54,968 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:17:54,968 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:17:54,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:17:54,969 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:17:54,969 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:17:54,970 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:17:54,970 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:17:54,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:17:54,970 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:17:54,970 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:17:54,971 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:17:55,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:17:55,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:17:55,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:17:55,290 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:17:55,291 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:17:55,292 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.i [2023-08-26 15:17:56,483 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:17:56,761 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:17:56,762 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe010_tso.i [2023-08-26 15:17:56,775 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28b6756b0/3f0405fc2f1a4673a5ea4ecc5cc3fcab/FLAGe6977e816 [2023-08-26 15:17:56,790 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28b6756b0/3f0405fc2f1a4673a5ea4ecc5cc3fcab [2023-08-26 15:17:56,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:17:56,793 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:17:56,794 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:17:56,794 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:17:56,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:17:56,797 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:17:56" (1/1) ... [2023-08-26 15:17:56,798 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@115522e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:17:56, skipping insertion in model container [2023-08-26 15:17:56,798 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:17:56" (1/1) ... [2023-08-26 15:17:56,849 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:17:57,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:17:57,191 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:17:57,220 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 15:17:57,221 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 15:17:57,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:17:57,273 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:17:57,274 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:17:57,280 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:17:57,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:17:57 WrapperNode [2023-08-26 15:17:57,281 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:17:57,282 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:17:57,282 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:17:57,282 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:17:57,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:17:57" (1/1) ... [2023-08-26 15:17:57,307 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:17:57" (1/1) ... [2023-08-26 15:17:57,329 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 61 [2023-08-26 15:17:57,330 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:17:57,331 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:17:57,331 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:17:57,331 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:17:57,338 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:17:57" (1/1) ... [2023-08-26 15:17:57,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:17:57" (1/1) ... [2023-08-26 15:17:57,356 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:17:57" (1/1) ... [2023-08-26 15:17:57,357 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:17:57" (1/1) ... [2023-08-26 15:17:57,360 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:17:57" (1/1) ... [2023-08-26 15:17:57,362 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:17:57" (1/1) ... [2023-08-26 15:17:57,363 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:17:57" (1/1) ... [2023-08-26 15:17:57,364 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:17:57" (1/1) ... [2023-08-26 15:17:57,366 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:17:57,367 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:17:57,367 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:17:57,367 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:17:57,368 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:17:57" (1/1) ... [2023-08-26 15:17:57,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:17:57,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:17:57,401 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 15:17:57,414 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 15:17:57,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:17:57,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 15:17:57,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:17:57,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:17:57,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:17:57,440 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 15:17:57,440 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 15:17:57,440 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 15:17:57,441 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 15:17:57,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:17:57,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 15:17:57,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:17:57,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:17:57,442 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 15:17:57,551 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:17:57,553 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:17:57,704 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:17:57,709 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:17:57,710 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 15:17:57,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:17:57 BoogieIcfgContainer [2023-08-26 15:17:57,712 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:17:57,714 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:17:57,714 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:17:57,716 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:17:57,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:17:56" (1/3) ... [2023-08-26 15:17:57,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfa117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:17:57, skipping insertion in model container [2023-08-26 15:17:57,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:17:57" (2/3) ... [2023-08-26 15:17:57,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfa117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:17:57, skipping insertion in model container [2023-08-26 15:17:57,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:17:57" (3/3) ... [2023-08-26 15:17:57,719 INFO L112 eAbstractionObserver]: Analyzing ICFG safe010_tso.i [2023-08-26 15:17:57,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:17:57,734 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 15:17:57,734 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:17:57,774 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:17:57,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 75 transitions, 160 flow [2023-08-26 15:17:57,857 INFO L124 PetriNetUnfolderBase]: 3/73 cut-off events. [2023-08-26 15:17:57,858 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:17:57,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 73 events. 3/73 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2023-08-26 15:17:57,863 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 75 transitions, 160 flow [2023-08-26 15:17:57,869 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 61 transitions, 128 flow [2023-08-26 15:17:57,872 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:17:57,885 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 61 transitions, 128 flow [2023-08-26 15:17:57,892 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 61 transitions, 128 flow [2023-08-26 15:17:57,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 61 transitions, 128 flow [2023-08-26 15:17:57,930 INFO L124 PetriNetUnfolderBase]: 1/61 cut-off events. [2023-08-26 15:17:57,930 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:17:57,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 61 events. 1/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2023-08-26 15:17:57,932 INFO L119 LiptonReduction]: Number of co-enabled transitions 612 [2023-08-26 15:17:59,809 INFO L134 LiptonReduction]: Checked pairs total: 1133 [2023-08-26 15:17:59,809 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-26 15:17:59,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:17:59,826 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;@7e8ce53e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:17:59,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 15:17:59,827 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:17:59,827 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 15:17:59,827 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:17:59,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:17:59,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 15:17:59,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 15:17:59,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:17:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash 268, now seen corresponding path program 1 times [2023-08-26 15:17:59,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:17:59,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908762345] [2023-08-26 15:17:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:17:59,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:17:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:17:59,932 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 15:17:59,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:17:59,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908762345] [2023-08-26 15:17:59,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908762345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:17:59,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:17:59,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 15:17:59,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559947458] [2023-08-26 15:17:59,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:17:59,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:17:59,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:17:59,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:17:59,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:17:59,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 136 [2023-08-26 15:17:59,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 40 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:17:59,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:17:59,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 136 [2023-08-26 15:17:59,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:00,000 INFO L124 PetriNetUnfolderBase]: 32/71 cut-off events. [2023-08-26 15:18:00,001 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 15:18:00,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 71 events. 32/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 218 event pairs, 32 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 139. Up to 67 conditions per place. [2023-08-26 15:18:00,003 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 10 selfloop transitions, 0 changer transitions 0/12 dead transitions. [2023-08-26 15:18:00,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 12 transitions, 50 flow [2023-08-26 15:18:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:18:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:18:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 153 transitions. [2023-08-26 15:18:00,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-08-26 15:18:00,014 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 153 transitions. [2023-08-26 15:18:00,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 153 transitions. [2023-08-26 15:18:00,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:00,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 153 transitions. [2023-08-26 15:18:00,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,023 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,025 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 40 flow. Second operand 2 states and 153 transitions. [2023-08-26 15:18:00,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 12 transitions, 50 flow [2023-08-26 15:18:00,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 12 transitions, 48 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:18:00,028 INFO L231 Difference]: Finished difference. Result has 18 places, 12 transitions, 28 flow [2023-08-26 15:18:00,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=28, PETRI_PLACES=18, PETRI_TRANSITIONS=12} [2023-08-26 15:18:00,032 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -5 predicate places. [2023-08-26 15:18:00,032 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 12 transitions, 28 flow [2023-08-26 15:18:00,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:00,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 15:18:00,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:18:00,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 15:18:00,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:00,034 INFO L85 PathProgramCache]: Analyzing trace with hash -777544409, now seen corresponding path program 1 times [2023-08-26 15:18:00,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:00,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8909897] [2023-08-26 15:18:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:00,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:00,353 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 15:18:00,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:00,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8909897] [2023-08-26 15:18:00,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8909897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:00,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:00,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:18:00,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858241933] [2023-08-26 15:18:00,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:00,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:18:00,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:00,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:18:00,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:18:00,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 136 [2023-08-26 15:18:00,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 12 transitions, 28 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:00,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 136 [2023-08-26 15:18:00,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:00,398 INFO L124 PetriNetUnfolderBase]: 44/106 cut-off events. [2023-08-26 15:18:00,398 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:18:00,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 106 events. 44/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 405 event pairs, 16 based on Foata normal form. 7/113 useless extension candidates. Maximal degree in co-relation 212. Up to 64 conditions per place. [2023-08-26 15:18:00,399 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 14 selfloop transitions, 4 changer transitions 0/19 dead transitions. [2023-08-26 15:18:00,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 80 flow [2023-08-26 15:18:00,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:18:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:18:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-08-26 15:18:00,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2023-08-26 15:18:00,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-08-26 15:18:00,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-08-26 15:18:00,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:00,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-08-26 15:18:00,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,407 INFO L175 Difference]: Start difference. First operand has 18 places, 12 transitions, 28 flow. Second operand 3 states and 208 transitions. [2023-08-26 15:18:00,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 80 flow [2023-08-26 15:18:00,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:18:00,408 INFO L231 Difference]: Finished difference. Result has 21 places, 14 transitions, 50 flow [2023-08-26 15:18:00,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=21, PETRI_TRANSITIONS=14} [2023-08-26 15:18:00,409 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -2 predicate places. [2023-08-26 15:18:00,409 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 14 transitions, 50 flow [2023-08-26 15:18:00,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:00,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:00,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:18:00,410 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 15:18:00,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:00,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1665926184, now seen corresponding path program 1 times [2023-08-26 15:18:00,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:00,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480131614] [2023-08-26 15:18:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:00,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:00,510 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 15:18:00,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:00,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480131614] [2023-08-26 15:18:00,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480131614] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:00,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:00,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:18:00,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068642838] [2023-08-26 15:18:00,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:00,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:18:00,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:00,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:18:00,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:18:00,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 136 [2023-08-26 15:18:00,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 14 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:00,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 136 [2023-08-26 15:18:00,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:00,557 INFO L124 PetriNetUnfolderBase]: 35/91 cut-off events. [2023-08-26 15:18:00,557 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 15:18:00,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 91 events. 35/91 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 325 event pairs, 16 based on Foata normal form. 2/92 useless extension candidates. Maximal degree in co-relation 225. Up to 60 conditions per place. [2023-08-26 15:18:00,558 INFO L140 encePairwiseOnDemand]: 133/136 looper letters, 12 selfloop transitions, 3 changer transitions 0/17 dead transitions. [2023-08-26 15:18:00,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 89 flow [2023-08-26 15:18:00,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:18:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:18:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-08-26 15:18:00,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196078431372549 [2023-08-26 15:18:00,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-08-26 15:18:00,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-08-26 15:18:00,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:00,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-08-26 15:18:00,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,568 INFO L175 Difference]: Start difference. First operand has 21 places, 14 transitions, 50 flow. Second operand 3 states and 212 transitions. [2023-08-26 15:18:00,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 89 flow [2023-08-26 15:18:00,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 84 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:18:00,570 INFO L231 Difference]: Finished difference. Result has 23 places, 14 transitions, 57 flow [2023-08-26 15:18:00,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=23, PETRI_TRANSITIONS=14} [2023-08-26 15:18:00,571 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2023-08-26 15:18:00,571 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 14 transitions, 57 flow [2023-08-26 15:18:00,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:00,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:00,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:18:00,575 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 15:18:00,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:00,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1665925874, now seen corresponding path program 1 times [2023-08-26 15:18:00,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:00,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987729034] [2023-08-26 15:18:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:00,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:00,739 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 15:18:00,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:00,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987729034] [2023-08-26 15:18:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987729034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:00,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:18:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87001943] [2023-08-26 15:18:00,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:00,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:18:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:00,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:18:00,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:18:00,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 136 [2023-08-26 15:18:00,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 14 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:00,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 136 [2023-08-26 15:18:00,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:00,785 INFO L124 PetriNetUnfolderBase]: 38/95 cut-off events. [2023-08-26 15:18:00,786 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-26 15:18:00,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 95 events. 38/95 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 333 event pairs, 6 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 240. Up to 52 conditions per place. [2023-08-26 15:18:00,789 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 15 selfloop transitions, 6 changer transitions 0/22 dead transitions. [2023-08-26 15:18:00,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 22 transitions, 121 flow [2023-08-26 15:18:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:18:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:18:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2023-08-26 15:18:00,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018382352941176 [2023-08-26 15:18:00,791 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 273 transitions. [2023-08-26 15:18:00,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 273 transitions. [2023-08-26 15:18:00,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:00,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 273 transitions. [2023-08-26 15:18:00,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,794 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,794 INFO L175 Difference]: Start difference. First operand has 23 places, 14 transitions, 57 flow. Second operand 4 states and 273 transitions. [2023-08-26 15:18:00,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 22 transitions, 121 flow [2023-08-26 15:18:00,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 115 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:18:00,796 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 77 flow [2023-08-26 15:18:00,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=77, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-08-26 15:18:00,797 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2023-08-26 15:18:00,797 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 77 flow [2023-08-26 15:18:00,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:00,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:00,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:18:00,798 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 15:18:00,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:00,799 INFO L85 PathProgramCache]: Analyzing trace with hash 104102929, now seen corresponding path program 1 times [2023-08-26 15:18:00,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:00,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839861969] [2023-08-26 15:18:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:00,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:00,908 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 15:18:00,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:00,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839861969] [2023-08-26 15:18:00,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839861969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:00,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:00,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:18:00,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214521521] [2023-08-26 15:18:00,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:00,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:18:00,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:00,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:18:00,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:18:00,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 136 [2023-08-26 15:18:00,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:00,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 136 [2023-08-26 15:18:00,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:00,978 INFO L124 PetriNetUnfolderBase]: 67/141 cut-off events. [2023-08-26 15:18:00,983 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2023-08-26 15:18:00,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 141 events. 67/141 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 481 event pairs, 9 based on Foata normal form. 3/144 useless extension candidates. Maximal degree in co-relation 399. Up to 55 conditions per place. [2023-08-26 15:18:00,985 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 21 selfloop transitions, 8 changer transitions 4/33 dead transitions. [2023-08-26 15:18:00,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 33 transitions, 202 flow [2023-08-26 15:18:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:18:00,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:18:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 337 transitions. [2023-08-26 15:18:00,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49558823529411766 [2023-08-26 15:18:00,987 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 337 transitions. [2023-08-26 15:18:00,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 337 transitions. [2023-08-26 15:18:00,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:00,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 337 transitions. [2023-08-26 15:18:00,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,990 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,990 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 77 flow. Second operand 5 states and 337 transitions. [2023-08-26 15:18:00,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 33 transitions, 202 flow [2023-08-26 15:18:00,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:18:00,992 INFO L231 Difference]: Finished difference. Result has 32 places, 18 transitions, 120 flow [2023-08-26 15:18:00,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=32, PETRI_TRANSITIONS=18} [2023-08-26 15:18:00,994 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 9 predicate places. [2023-08-26 15:18:00,994 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 18 transitions, 120 flow [2023-08-26 15:18:00,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 4 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:00,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:00,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:00,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:18:00,995 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 15:18:00,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:00,995 INFO L85 PathProgramCache]: Analyzing trace with hash 104093629, now seen corresponding path program 2 times [2023-08-26 15:18:00,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:00,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473021057] [2023-08-26 15:18:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:00,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:01,101 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 15:18:01,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:01,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473021057] [2023-08-26 15:18:01,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473021057] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:01,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:01,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:18:01,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071893052] [2023-08-26 15:18:01,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:01,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:18:01,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:01,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:18:01,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:18:01,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 136 [2023-08-26 15:18:01,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 18 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 62.6) internal successors, (313), 5 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:01,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 136 [2023-08-26 15:18:01,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:01,149 INFO L124 PetriNetUnfolderBase]: 56/127 cut-off events. [2023-08-26 15:18:01,149 INFO L125 PetriNetUnfolderBase]: For 260/260 co-relation queries the response was YES. [2023-08-26 15:18:01,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 127 events. 56/127 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 445 event pairs, 17 based on Foata normal form. 9/136 useless extension candidates. Maximal degree in co-relation 411. Up to 56 conditions per place. [2023-08-26 15:18:01,150 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 14 selfloop transitions, 4 changer transitions 10/28 dead transitions. [2023-08-26 15:18:01,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 28 transitions, 205 flow [2023-08-26 15:18:01,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:18:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:18:01,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2023-08-26 15:18:01,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48676470588235293 [2023-08-26 15:18:01,152 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 331 transitions. [2023-08-26 15:18:01,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 331 transitions. [2023-08-26 15:18:01,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:01,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 331 transitions. [2023-08-26 15:18:01,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,155 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,155 INFO L175 Difference]: Start difference. First operand has 32 places, 18 transitions, 120 flow. Second operand 5 states and 331 transitions. [2023-08-26 15:18:01,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 28 transitions, 205 flow [2023-08-26 15:18:01,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 187 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-26 15:18:01,158 INFO L231 Difference]: Finished difference. Result has 35 places, 12 transitions, 77 flow [2023-08-26 15:18:01,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=12} [2023-08-26 15:18:01,159 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 12 predicate places. [2023-08-26 15:18:01,159 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 12 transitions, 77 flow [2023-08-26 15:18:01,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.6) internal successors, (313), 5 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:01,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:01,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:18:01,160 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 15:18:01,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash -532455553, now seen corresponding path program 1 times [2023-08-26 15:18:01,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:01,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657179895] [2023-08-26 15:18:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:01,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:18:01,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:01,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657179895] [2023-08-26 15:18:01,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657179895] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:01,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:01,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:18:01,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067519764] [2023-08-26 15:18:01,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:01,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:18:01,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:01,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:18:01,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:18:01,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 136 [2023-08-26 15:18:01,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 12 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:01,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 136 [2023-08-26 15:18:01,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:01,360 INFO L124 PetriNetUnfolderBase]: 13/44 cut-off events. [2023-08-26 15:18:01,360 INFO L125 PetriNetUnfolderBase]: For 104/105 co-relation queries the response was YES. [2023-08-26 15:18:01,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 44 events. 13/44 cut-off events. For 104/105 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 103 event pairs, 3 based on Foata normal form. 2/45 useless extension candidates. Maximal degree in co-relation 154. Up to 20 conditions per place. [2023-08-26 15:18:01,361 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 11 selfloop transitions, 2 changer transitions 10/25 dead transitions. [2023-08-26 15:18:01,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 25 transitions, 182 flow [2023-08-26 15:18:01,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:18:01,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:18:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 340 transitions. [2023-08-26 15:18:01,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-26 15:18:01,365 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 340 transitions. [2023-08-26 15:18:01,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 340 transitions. [2023-08-26 15:18:01,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:01,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 340 transitions. [2023-08-26 15:18:01,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,367 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,367 INFO L175 Difference]: Start difference. First operand has 35 places, 12 transitions, 77 flow. Second operand 5 states and 340 transitions. [2023-08-26 15:18:01,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 25 transitions, 182 flow [2023-08-26 15:18:01,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 25 transitions, 123 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-08-26 15:18:01,369 INFO L231 Difference]: Finished difference. Result has 31 places, 12 transitions, 58 flow [2023-08-26 15:18:01,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=12} [2023-08-26 15:18:01,370 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 8 predicate places. [2023-08-26 15:18:01,370 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 12 transitions, 58 flow [2023-08-26 15:18:01,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:01,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:01,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:18:01,370 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 15:18:01,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:01,371 INFO L85 PathProgramCache]: Analyzing trace with hash 264417478, now seen corresponding path program 1 times [2023-08-26 15:18:01,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:01,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56025265] [2023-08-26 15:18:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:01,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:01,552 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 15:18:01,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:01,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56025265] [2023-08-26 15:18:01,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56025265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:01,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:01,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:18:01,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569826399] [2023-08-26 15:18:01,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:01,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:18:01,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:01,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:18:01,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:18:01,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 136 [2023-08-26 15:18:01,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 12 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 64.8) internal successors, (324), 5 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:01,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 136 [2023-08-26 15:18:01,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:01,588 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2023-08-26 15:18:01,588 INFO L125 PetriNetUnfolderBase]: For 18/20 co-relation queries the response was YES. [2023-08-26 15:18:01,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 26 events. 6/26 cut-off events. For 18/20 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 2 based on Foata normal form. 2/27 useless extension candidates. Maximal degree in co-relation 84. Up to 10 conditions per place. [2023-08-26 15:18:01,588 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 0 selfloop transitions, 0 changer transitions 17/17 dead transitions. [2023-08-26 15:18:01,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 17 transitions, 102 flow [2023-08-26 15:18:01,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:18:01,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:18:01,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 394 transitions. [2023-08-26 15:18:01,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48284313725490197 [2023-08-26 15:18:01,590 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 394 transitions. [2023-08-26 15:18:01,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 394 transitions. [2023-08-26 15:18:01,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:01,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 394 transitions. [2023-08-26 15:18:01,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,595 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,595 INFO L175 Difference]: Start difference. First operand has 31 places, 12 transitions, 58 flow. Second operand 6 states and 394 transitions. [2023-08-26 15:18:01,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 17 transitions, 102 flow [2023-08-26 15:18:01,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 17 transitions, 87 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-26 15:18:01,596 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-08-26 15:18:01,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2023-08-26 15:18:01,597 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2023-08-26 15:18:01,598 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-08-26 15:18:01,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.8) internal successors, (324), 5 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:01,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-08-26 15:18:01,600 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-26 15:18:01,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-26 15:18:01,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-26 15:18:01,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2023-08-26 15:18:01,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-26 15:18:01,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 7 remaining) [2023-08-26 15:18:01,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:18:01,602 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:01,604 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:18:01,604 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:18:01,615 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:18:01 BasicIcfg [2023-08-26 15:18:01,615 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:18:01,615 INFO L158 Benchmark]: Toolchain (without parser) took 4822.19ms. Allocated memory was 358.6MB in the beginning and 432.0MB in the end (delta: 73.4MB). Free memory was 333.1MB in the beginning and 392.6MB in the end (delta: -59.5MB). Peak memory consumption was 14.4MB. Max. memory is 16.0GB. [2023-08-26 15:18:01,615 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 358.6MB. Free memory is still 334.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:18:01,616 INFO L158 Benchmark]: CACSL2BoogieTranslator took 486.86ms. Allocated memory is still 358.6MB. Free memory was 332.6MB in the beginning and 313.3MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 15:18:01,616 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.21ms. Allocated memory is still 358.6MB. Free memory was 312.8MB in the beginning and 311.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:18:01,616 INFO L158 Benchmark]: Boogie Preprocessor took 35.27ms. Allocated memory is still 358.6MB. Free memory was 311.2MB in the beginning and 309.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:18:01,616 INFO L158 Benchmark]: RCFGBuilder took 345.20ms. Allocated memory is still 358.6MB. Free memory was 309.6MB in the beginning and 296.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 15:18:01,617 INFO L158 Benchmark]: TraceAbstraction took 3901.18ms. Allocated memory was 358.6MB in the beginning and 432.0MB in the end (delta: 73.4MB). Free memory was 296.0MB in the beginning and 392.6MB in the end (delta: -96.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:18:01,618 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 358.6MB. Free memory is still 334.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 486.86ms. Allocated memory is still 358.6MB. Free memory was 332.6MB in the beginning and 313.3MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 48.21ms. Allocated memory is still 358.6MB. Free memory was 312.8MB in the beginning and 311.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 35.27ms. Allocated memory is still 358.6MB. Free memory was 311.2MB in the beginning and 309.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 345.20ms. Allocated memory is still 358.6MB. Free memory was 309.6MB in the beginning and 296.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 3901.18ms. Allocated memory was 358.6MB in the beginning and 432.0MB in the end (delta: 73.4MB). Free memory was 296.0MB in the beginning and 392.6MB in the end (delta: -96.6MB). There was no memory consumed. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 67 PlacesBefore, 23 PlacesAfterwards, 61 TransitionsBefore, 17 TransitionsAfterwards, 612 CoEnabledTransitionPairs, 5 FixpointIterations, 22 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 0 ChoiceCompositions, 61 TotalNumberOfCompositions, 1133 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 810, independent: 753, independent conditional: 0, independent unconditional: 753, dependent: 57, dependent conditional: 0, dependent unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 365, independent: 350, independent conditional: 0, independent unconditional: 350, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 810, independent: 403, independent conditional: 0, independent unconditional: 403, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 365, unknown conditional: 0, unknown unconditional: 365] , Statistics on independence cache: Total cache size (in pairs): 30, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, 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: 17]: 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, 89 locations, 7 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: 3.8s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 68 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 189 IncrementalHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 7 mSDtfsCounter, 189 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=5, InterpolantAutomatonStates: 33, 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, 1.0s InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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 5 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 15:18:01,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...