/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:46:53,999 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:46:54,080 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 18:46:54,086 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:46:54,086 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:46:54,117 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:46:54,117 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:46:54,118 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:46:54,119 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:46:54,122 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:46:54,123 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:46:54,123 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:46:54,123 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:46:54,124 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:46:54,125 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:46:54,125 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:46:54,125 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:46:54,125 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:46:54,126 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:46:54,126 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:46:54,126 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:46:54,126 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:46:54,127 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:46:54,127 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:46:54,127 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:46:54,128 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:46:54,128 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:46:54,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:46:54,128 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:46:54,129 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:46:54,130 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:46:54,130 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:46:54,130 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:46:54,130 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:46:54,130 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:46:54,131 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:46:54,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:46:54,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:46:54,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:46:54,472 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:46:54,473 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:46:54,474 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i [2023-08-26 18:46:55,734 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:46:55,999 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:46:55,999 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i [2023-08-26 18:46:56,019 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce842a96/351da146e98544789a83094353204aa8/FLAGd48f5f04d [2023-08-26 18:46:56,033 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce842a96/351da146e98544789a83094353204aa8 [2023-08-26 18:46:56,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:46:56,039 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:46:56,041 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:46:56,041 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:46:56,044 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:46:56,045 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:46:56" (1/1) ... [2023-08-26 18:46:56,046 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@348d1a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:56, skipping insertion in model container [2023-08-26 18:46:56,046 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:46:56" (1/1) ... [2023-08-26 18:46:56,096 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:46:56,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:46:56,419 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:46:56,450 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 18:46:56,452 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 18:46:56,467 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:46:56,505 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:46:56,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:56 WrapperNode [2023-08-26 18:46:56,506 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:46:56,506 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:46:56,506 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:46:56,506 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:46:56,513 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:56" (1/1) ... [2023-08-26 18:46:56,526 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:56" (1/1) ... [2023-08-26 18:46:56,558 INFO L138 Inliner]: procedures = 170, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 88 [2023-08-26 18:46:56,558 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:46:56,559 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:46:56,560 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:46:56,560 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:46:56,566 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:56" (1/1) ... [2023-08-26 18:46:56,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:56" (1/1) ... [2023-08-26 18:46:56,581 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:56" (1/1) ... [2023-08-26 18:46:56,582 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:56" (1/1) ... [2023-08-26 18:46:56,587 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:56" (1/1) ... [2023-08-26 18:46:56,590 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:56" (1/1) ... [2023-08-26 18:46:56,592 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:56" (1/1) ... [2023-08-26 18:46:56,607 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:56" (1/1) ... [2023-08-26 18:46:56,609 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:46:56,610 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:46:56,610 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:46:56,610 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:46:56,611 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:56" (1/1) ... [2023-08-26 18:46:56,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:46:56,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:46:56,650 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 18:46:56,679 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 18:46:56,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:46:56,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:46:56,693 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 18:46:56,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:46:56,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:46:56,694 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 18:46:56,694 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 18:46:56,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:46:56,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:46:56,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:46:56,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:46:56,696 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 18:46:56,839 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:46:56,841 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:46:57,042 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:46:57,049 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:46:57,049 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-26 18:46:57,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:46:57 BoogieIcfgContainer [2023-08-26 18:46:57,051 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:46:57,053 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:46:57,053 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:46:57,055 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:46:57,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:46:56" (1/3) ... [2023-08-26 18:46:57,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a73130d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:46:57, skipping insertion in model container [2023-08-26 18:46:57,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:56" (2/3) ... [2023-08-26 18:46:57,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a73130d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:46:57, skipping insertion in model container [2023-08-26 18:46:57,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:46:57" (3/3) ... [2023-08-26 18:46:57,057 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_11-ptr_racing.i [2023-08-26 18:46:57,073 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:46:57,073 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-26 18:46:57,073 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:46:57,128 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 18:46:57,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 135 transitions, 278 flow [2023-08-26 18:46:57,217 INFO L124 PetriNetUnfolderBase]: 19/182 cut-off events. [2023-08-26 18:46:57,218 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:46:57,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 182 events. 19/182 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 548 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-26 18:46:57,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 135 transitions, 278 flow [2023-08-26 18:46:57,230 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 135 transitions, 278 flow [2023-08-26 18:46:57,234 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:46:57,242 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 135 transitions, 278 flow [2023-08-26 18:46:57,245 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 135 transitions, 278 flow [2023-08-26 18:46:57,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 135 transitions, 278 flow [2023-08-26 18:46:57,279 INFO L124 PetriNetUnfolderBase]: 19/182 cut-off events. [2023-08-26 18:46:57,279 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:46:57,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 182 events. 19/182 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 548 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-26 18:46:57,284 INFO L119 LiptonReduction]: Number of co-enabled transitions 4346 [2023-08-26 18:47:01,016 INFO L134 LiptonReduction]: Checked pairs total: 8971 [2023-08-26 18:47:01,017 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-26 18:47:01,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:47:01,033 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;@5fa6c564, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:47:01,033 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-26 18:47:01,035 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:47:01,036 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-08-26 18:47:01,036 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:47:01,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:01,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:47:01,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:47:01,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:01,041 INFO L85 PathProgramCache]: Analyzing trace with hash 16664, now seen corresponding path program 1 times [2023-08-26 18:47:01,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:01,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791127809] [2023-08-26 18:47:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:01,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:01,286 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 18:47:01,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:01,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791127809] [2023-08-26 18:47:01,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791127809] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:47:01,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:47:01,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:47:01,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77709618] [2023-08-26 18:47:01,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:47:01,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:47:01,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:01,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:47:01,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:47:01,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 258 [2023-08-26 18:47:01,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 48 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:01,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:01,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 258 [2023-08-26 18:47:01,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:47:01,534 INFO L124 PetriNetUnfolderBase]: 211/473 cut-off events. [2023-08-26 18:47:01,535 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:47:01,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 950 conditions, 473 events. 211/473 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2336 event pairs, 195 based on Foata normal form. 15/289 useless extension candidates. Maximal degree in co-relation 900. Up to 434 conditions per place. [2023-08-26 18:47:01,547 INFO L140 encePairwiseOnDemand]: 244/258 looper letters, 43 selfloop transitions, 2 changer transitions 3/51 dead transitions. [2023-08-26 18:47:01,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 206 flow [2023-08-26 18:47:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:47:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:47:01,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2023-08-26 18:47:01,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4483204134366925 [2023-08-26 18:47:01,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 347 transitions. [2023-08-26 18:47:01,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 347 transitions. [2023-08-26 18:47:01,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:47:01,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 347 transitions. [2023-08-26 18:47:01,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:01,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:01,583 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:01,585 INFO L175 Difference]: Start difference. First operand has 42 places, 48 transitions, 104 flow. Second operand 3 states and 347 transitions. [2023-08-26 18:47:01,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 206 flow [2023-08-26 18:47:01,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:47:01,592 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 84 flow [2023-08-26 18:47:01,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-08-26 18:47:01,597 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-08-26 18:47:01,598 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 84 flow [2023-08-26 18:47:01,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:01,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:01,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:47:01,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:47:01,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:47:01,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:01,600 INFO L85 PathProgramCache]: Analyzing trace with hash 16665, now seen corresponding path program 1 times [2023-08-26 18:47:01,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:01,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366138592] [2023-08-26 18:47:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:01,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:01,782 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 18:47:01,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:01,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366138592] [2023-08-26 18:47:01,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366138592] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:47:01,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:47:01,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:47:01,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817330891] [2023-08-26 18:47:01,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:47:01,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:47:01,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:01,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:47:01,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:47:01,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 258 [2023-08-26 18:47:01,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:01,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:01,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 258 [2023-08-26 18:47:01,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:47:01,906 INFO L124 PetriNetUnfolderBase]: 168/408 cut-off events. [2023-08-26 18:47:01,906 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 18:47:01,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 408 events. 168/408 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2013 event pairs, 143 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 771. Up to 356 conditions per place. [2023-08-26 18:47:01,909 INFO L140 encePairwiseOnDemand]: 254/258 looper letters, 41 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-26 18:47:01,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 49 transitions, 196 flow [2023-08-26 18:47:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:47:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:47:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-08-26 18:47:01,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2023-08-26 18:47:01,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-08-26 18:47:01,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-08-26 18:47:01,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:47:01,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-08-26 18:47:01,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:01,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:01,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:01,915 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 84 flow. Second operand 3 states and 309 transitions. [2023-08-26 18:47:01,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 49 transitions, 196 flow [2023-08-26 18:47:01,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 49 transitions, 192 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:47:01,917 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 90 flow [2023-08-26 18:47:01,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-26 18:47:01,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-26 18:47:01,918 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 90 flow [2023-08-26 18:47:01,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:01,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:01,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 18:47:01,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:47:01,920 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:47:01,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:01,920 INFO L85 PathProgramCache]: Analyzing trace with hash 496865724, now seen corresponding path program 1 times [2023-08-26 18:47:01,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:01,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132201429] [2023-08-26 18:47:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:01,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:47:02,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:02,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132201429] [2023-08-26 18:47:02,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132201429] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:47:02,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088731961] [2023-08-26 18:47:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:02,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:47:02,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:47:02,049 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:47:02,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 18:47:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:02,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 18:47:02,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:47:02,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 18:47:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:47:02,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:47:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:47:02,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088731961] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:47:02,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:47:02,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-26 18:47:02,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998114408] [2023-08-26 18:47:02,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:47:02,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:47:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:02,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:47:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:47:02,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 258 [2023-08-26 18:47:02,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 89.71428571428571) internal successors, (628), 7 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:02,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:02,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 258 [2023-08-26 18:47:02,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:47:02,359 INFO L124 PetriNetUnfolderBase]: 24/83 cut-off events. [2023-08-26 18:47:02,360 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 18:47:02,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 83 events. 24/83 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 266 event pairs, 0 based on Foata normal form. 13/89 useless extension candidates. Maximal degree in co-relation 155. Up to 50 conditions per place. [2023-08-26 18:47:02,360 INFO L140 encePairwiseOnDemand]: 254/258 looper letters, 21 selfloop transitions, 2 changer transitions 6/35 dead transitions. [2023-08-26 18:47:02,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 139 flow [2023-08-26 18:47:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:47:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:47:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 383 transitions. [2023-08-26 18:47:02,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37112403100775193 [2023-08-26 18:47:02,363 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 383 transitions. [2023-08-26 18:47:02,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 383 transitions. [2023-08-26 18:47:02,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:47:02,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 383 transitions. [2023-08-26 18:47:02,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:02,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:02,367 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:02,367 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 90 flow. Second operand 4 states and 383 transitions. [2023-08-26 18:47:02,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 139 flow [2023-08-26 18:47:02,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 133 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:47:02,368 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 47 flow [2023-08-26 18:47:02,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=47, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-26 18:47:02,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -14 predicate places. [2023-08-26 18:47:02,369 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 47 flow [2023-08-26 18:47:02,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 89.71428571428571) internal successors, (628), 7 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:02,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:02,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:47:02,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 18:47:02,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:47:02,576 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:47:02,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:02,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1777053308, now seen corresponding path program 1 times [2023-08-26 18:47:02,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:02,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164763567] [2023-08-26 18:47:02,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:02,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:47:02,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:02,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164763567] [2023-08-26 18:47:02,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164763567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:47:02,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:47:02,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:47:02,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451627418] [2023-08-26 18:47:02,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:47:02,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:47:02,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:02,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:47:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:47:02,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 258 [2023-08-26 18:47:02,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 47 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:02,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:02,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 258 [2023-08-26 18:47:02,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:47:02,824 INFO L124 PetriNetUnfolderBase]: 20/62 cut-off events. [2023-08-26 18:47:02,825 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 18:47:02,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 62 events. 20/62 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 129 event pairs, 0 based on Foata normal form. 3/56 useless extension candidates. Maximal degree in co-relation 121. Up to 50 conditions per place. [2023-08-26 18:47:02,826 INFO L140 encePairwiseOnDemand]: 254/258 looper letters, 14 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-26 18:47:02,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 19 transitions, 81 flow [2023-08-26 18:47:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:47:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:47:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 362 transitions. [2023-08-26 18:47:02,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507751937984496 [2023-08-26 18:47:02,828 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 362 transitions. [2023-08-26 18:47:02,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 362 transitions. [2023-08-26 18:47:02,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:47:02,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 362 transitions. [2023-08-26 18:47:02,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:02,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:02,831 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:02,831 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 47 flow. Second operand 4 states and 362 transitions. [2023-08-26 18:47:02,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 19 transitions, 81 flow [2023-08-26 18:47:02,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 19 transitions, 77 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:47:02,833 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 44 flow [2023-08-26 18:47:02,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=44, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-08-26 18:47:02,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -18 predicate places. [2023-08-26 18:47:02,834 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 44 flow [2023-08-26 18:47:02,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:02,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:02,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:47:02,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:47:02,835 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:47:02,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:02,836 INFO L85 PathProgramCache]: Analyzing trace with hash 745919363, now seen corresponding path program 1 times [2023-08-26 18:47:02,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:02,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844769005] [2023-08-26 18:47:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:02,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:02,965 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 18:47:02,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:02,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844769005] [2023-08-26 18:47:02,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844769005] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:47:02,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:47:02,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:47:02,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087917315] [2023-08-26 18:47:02,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:47:02,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:47:02,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:02,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:47:02,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:47:02,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 258 [2023-08-26 18:47:02,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 44 flow. Second operand has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:02,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:02,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 258 [2023-08-26 18:47:02,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:47:03,017 INFO L124 PetriNetUnfolderBase]: 12/42 cut-off events. [2023-08-26 18:47:03,017 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 18:47:03,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 42 events. 12/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 3/45 useless extension candidates. Maximal degree in co-relation 80. Up to 30 conditions per place. [2023-08-26 18:47:03,017 INFO L140 encePairwiseOnDemand]: 252/258 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2023-08-26 18:47:03,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 65 flow [2023-08-26 18:47:03,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:47:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:47:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 356 transitions. [2023-08-26 18:47:03,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3449612403100775 [2023-08-26 18:47:03,019 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 356 transitions. [2023-08-26 18:47:03,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 356 transitions. [2023-08-26 18:47:03,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:47:03,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 356 transitions. [2023-08-26 18:47:03,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:03,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:03,023 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:03,023 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 44 flow. Second operand 4 states and 356 transitions. [2023-08-26 18:47:03,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 65 flow [2023-08-26 18:47:03,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 62 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:47:03,024 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-26 18:47:03,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-26 18:47:03,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -21 predicate places. [2023-08-26 18:47:03,026 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-26 18:47:03,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:03,030 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 23 remaining) [2023-08-26 18:47:03,030 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-26 18:47:03,033 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-26 18:47:03,033 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-26 18:47:03,034 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-26 18:47:03,034 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (17 of 23 remaining) [2023-08-26 18:47:03,034 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-26 18:47:03,034 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-26 18:47:03,035 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-26 18:47:03,035 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2023-08-26 18:47:03,035 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2023-08-26 18:47:03,035 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 23 remaining) [2023-08-26 18:47:03,035 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-26 18:47:03,036 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-26 18:47:03,036 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 23 remaining) [2023-08-26 18:47:03,036 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2023-08-26 18:47:03,036 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-26 18:47:03,036 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-26 18:47:03,036 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-26 18:47:03,036 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-26 18:47:03,036 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 23 remaining) [2023-08-26 18:47:03,036 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-26 18:47:03,036 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-26 18:47:03,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:47:03,037 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 18:47:03,039 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-26 18:47:03,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 135 transitions, 278 flow [2023-08-26 18:47:03,072 INFO L124 PetriNetUnfolderBase]: 19/182 cut-off events. [2023-08-26 18:47:03,073 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:47:03,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 182 events. 19/182 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 548 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-26 18:47:03,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 135 transitions, 278 flow [2023-08-26 18:47:03,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 130 transitions, 265 flow [2023-08-26 18:47:03,075 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:47:03,076 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 130 transitions, 265 flow [2023-08-26 18:47:03,076 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 130 transitions, 265 flow [2023-08-26 18:47:03,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 130 transitions, 265 flow [2023-08-26 18:47:03,093 INFO L124 PetriNetUnfolderBase]: 18/177 cut-off events. [2023-08-26 18:47:03,093 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:47:03,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 177 events. 18/177 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 526 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-26 18:47:03,096 INFO L119 LiptonReduction]: Number of co-enabled transitions 4346 [2023-08-26 18:47:06,388 INFO L134 LiptonReduction]: Checked pairs total: 8540 [2023-08-26 18:47:06,388 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-26 18:47:06,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 18:47:06,391 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;@5fa6c564, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:47:06,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 18:47:06,394 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:47:06,394 INFO L124 PetriNetUnfolderBase]: 3/28 cut-off events. [2023-08-26 18:47:06,394 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:47:06,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:06,394 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 18:47:06,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 18:47:06,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:06,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1750014707, now seen corresponding path program 1 times [2023-08-26 18:47:06,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:06,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770923726] [2023-08-26 18:47:06,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:06,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:47:06,407 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 18:47:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:47:06,427 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 18:47:06,427 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 18:47:06,427 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 18:47:06,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:47:06,428 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 18:47:06,428 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-26 18:47:06,429 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 18:47:06,429 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 18:47:06,450 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 18:47:06,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 178 transitions, 374 flow [2023-08-26 18:47:06,478 INFO L124 PetriNetUnfolderBase]: 34/299 cut-off events. [2023-08-26 18:47:06,478 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:47:06,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 299 events. 34/299 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1088 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-08-26 18:47:06,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 178 transitions, 374 flow [2023-08-26 18:47:06,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 178 transitions, 374 flow [2023-08-26 18:47:06,483 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:47:06,483 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 178 transitions, 374 flow [2023-08-26 18:47:06,484 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 178 transitions, 374 flow [2023-08-26 18:47:06,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 178 transitions, 374 flow [2023-08-26 18:47:06,509 INFO L124 PetriNetUnfolderBase]: 34/299 cut-off events. [2023-08-26 18:47:06,509 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:47:06,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 299 events. 34/299 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1088 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-08-26 18:47:06,519 INFO L119 LiptonReduction]: Number of co-enabled transitions 12956 [2023-08-26 18:47:10,116 INFO L134 LiptonReduction]: Checked pairs total: 31436 [2023-08-26 18:47:10,117 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-08-26 18:47:10,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:47:10,119 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;@5fa6c564, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:47:10,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-08-26 18:47:10,120 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:47:10,120 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 18:47:10,120 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:47:10,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:10,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:47:10,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:47:10,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:10,121 INFO L85 PathProgramCache]: Analyzing trace with hash 32568, now seen corresponding path program 1 times [2023-08-26 18:47:10,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:10,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019791774] [2023-08-26 18:47:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:10,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:10,143 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 18:47:10,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:10,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019791774] [2023-08-26 18:47:10,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019791774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:47:10,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:47:10,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:47:10,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424326922] [2023-08-26 18:47:10,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:47:10,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:47:10,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:10,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:47:10,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:47:10,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 334 [2023-08-26 18:47:10,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:10,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:10,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 334 [2023-08-26 18:47:10,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:47:11,220 INFO L124 PetriNetUnfolderBase]: 7278/11869 cut-off events. [2023-08-26 18:47:11,220 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-08-26 18:47:11,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23434 conditions, 11869 events. 7278/11869 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 80399 event pairs, 6750 based on Foata normal form. 501/7877 useless extension candidates. Maximal degree in co-relation 18029. Up to 10670 conditions per place. [2023-08-26 18:47:11,299 INFO L140 encePairwiseOnDemand]: 312/334 looper letters, 78 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-26 18:47:11,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 87 transitions, 352 flow [2023-08-26 18:47:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:47:11,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:47:11,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-26 18:47:11,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750499001996008 [2023-08-26 18:47:11,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-26 18:47:11,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-26 18:47:11,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:47:11,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-26 18:47:11,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:11,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:11,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:11,313 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 172 flow. Second operand 3 states and 476 transitions. [2023-08-26 18:47:11,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 87 transitions, 352 flow [2023-08-26 18:47:11,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:47:11,319 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 136 flow [2023-08-26 18:47:11,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-08-26 18:47:11,321 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -4 predicate places. [2023-08-26 18:47:11,321 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 136 flow [2023-08-26 18:47:11,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:11,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:11,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:47:11,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:47:11,322 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:47:11,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:11,322 INFO L85 PathProgramCache]: Analyzing trace with hash 32567, now seen corresponding path program 1 times [2023-08-26 18:47:11,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:11,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018855173] [2023-08-26 18:47:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:11,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:11,392 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 18:47:11,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:11,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018855173] [2023-08-26 18:47:11,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018855173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:47:11,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:47:11,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:47:11,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63898312] [2023-08-26 18:47:11,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:47:11,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:47:11,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:11,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:47:11,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:47:11,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 334 [2023-08-26 18:47:11,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:11,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:11,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 334 [2023-08-26 18:47:11,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:47:12,290 INFO L124 PetriNetUnfolderBase]: 6386/10613 cut-off events. [2023-08-26 18:47:12,291 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2023-08-26 18:47:12,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21067 conditions, 10613 events. 6386/10613 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 73034 event pairs, 3010 based on Foata normal form. 0/7242 useless extension candidates. Maximal degree in co-relation 19380. Up to 10067 conditions per place. [2023-08-26 18:47:12,349 INFO L140 encePairwiseOnDemand]: 330/334 looper letters, 62 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-26 18:47:12,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 296 flow [2023-08-26 18:47:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:47:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:47:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-08-26 18:47:12,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4101796407185629 [2023-08-26 18:47:12,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-08-26 18:47:12,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-08-26 18:47:12,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:47:12,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-08-26 18:47:12,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:12,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:12,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:12,355 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 136 flow. Second operand 3 states and 411 transitions. [2023-08-26 18:47:12,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 296 flow [2023-08-26 18:47:12,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 73 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:47:12,366 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 146 flow [2023-08-26 18:47:12,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-26 18:47:12,368 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2023-08-26 18:47:12,368 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 146 flow [2023-08-26 18:47:12,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:12,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:12,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:47:12,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:47:12,369 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:47:12,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:12,369 INFO L85 PathProgramCache]: Analyzing trace with hash 36283327, now seen corresponding path program 1 times [2023-08-26 18:47:12,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:12,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157259720] [2023-08-26 18:47:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:12,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:12,557 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 18:47:12,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:12,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157259720] [2023-08-26 18:47:12,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157259720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:47:12,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:47:12,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:47:12,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746241530] [2023-08-26 18:47:12,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:47:12,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:47:12,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:12,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:47:12,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:47:12,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 334 [2023-08-26 18:47:12,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:12,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:12,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 334 [2023-08-26 18:47:12,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:47:13,450 INFO L124 PetriNetUnfolderBase]: 6348/10277 cut-off events. [2023-08-26 18:47:13,450 INFO L125 PetriNetUnfolderBase]: For 613/613 co-relation queries the response was YES. [2023-08-26 18:47:13,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21166 conditions, 10277 events. 6348/10277 cut-off events. For 613/613 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 69281 event pairs, 180 based on Foata normal form. 0/6935 useless extension candidates. Maximal degree in co-relation 21061. Up to 8865 conditions per place. [2023-08-26 18:47:13,503 INFO L140 encePairwiseOnDemand]: 328/334 looper letters, 120 selfloop transitions, 5 changer transitions 0/131 dead transitions. [2023-08-26 18:47:13,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 131 transitions, 559 flow [2023-08-26 18:47:13,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:47:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:47:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 705 transitions. [2023-08-26 18:47:13,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35179640718562877 [2023-08-26 18:47:13,506 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 705 transitions. [2023-08-26 18:47:13,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 705 transitions. [2023-08-26 18:47:13,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:47:13,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 705 transitions. [2023-08-26 18:47:13,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.5) internal successors, (705), 6 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:13,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 334.0) internal successors, (2338), 7 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:13,512 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 334.0) internal successors, (2338), 7 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:13,512 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 146 flow. Second operand 6 states and 705 transitions. [2023-08-26 18:47:13,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 131 transitions, 559 flow [2023-08-26 18:47:13,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 131 transitions, 556 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:47:13,516 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 152 flow [2023-08-26 18:47:13,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-08-26 18:47:13,518 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-08-26 18:47:13,518 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 152 flow [2023-08-26 18:47:13,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:13,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:13,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:47:13,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:47:13,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:47:13,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:13,521 INFO L85 PathProgramCache]: Analyzing trace with hash 36032188, now seen corresponding path program 1 times [2023-08-26 18:47:13,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:13,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101443388] [2023-08-26 18:47:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:13,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:47:13,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:13,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101443388] [2023-08-26 18:47:13,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101443388] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:47:13,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498446742] [2023-08-26 18:47:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:13,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:47:13,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:47:13,609 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:47:13,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 18:47:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:13,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 18:47:13,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:47:13,698 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 18:47:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:47:13,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:47:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:47:13,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498446742] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:47:13,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:47:13,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 18:47:13,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245319097] [2023-08-26 18:47:13,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:47:13,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:47:13,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:13,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:47:13,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:47:13,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 334 [2023-08-26 18:47:13,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:13,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:13,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 334 [2023-08-26 18:47:13,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:47:14,036 INFO L124 PetriNetUnfolderBase]: 928/1805 cut-off events. [2023-08-26 18:47:14,036 INFO L125 PetriNetUnfolderBase]: For 463/463 co-relation queries the response was YES. [2023-08-26 18:47:14,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1805 events. 928/1805 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11100 event pairs, 0 based on Foata normal form. 208/1712 useless extension candidates. Maximal degree in co-relation 3676. Up to 1114 conditions per place. [2023-08-26 18:47:14,044 INFO L140 encePairwiseOnDemand]: 330/334 looper letters, 69 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-08-26 18:47:14,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 80 transitions, 330 flow [2023-08-26 18:47:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:47:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:47:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 651 transitions. [2023-08-26 18:47:14,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898203592814371 [2023-08-26 18:47:14,047 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 651 transitions. [2023-08-26 18:47:14,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 651 transitions. [2023-08-26 18:47:14,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:47:14,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 651 transitions. [2023-08-26 18:47:14,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:14,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 334.0) internal successors, (2004), 6 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:14,054 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 334.0) internal successors, (2004), 6 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:14,054 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 152 flow. Second operand 5 states and 651 transitions. [2023-08-26 18:47:14,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 80 transitions, 330 flow [2023-08-26 18:47:14,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 80 transitions, 323 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 18:47:14,058 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 103 flow [2023-08-26 18:47:14,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-26 18:47:14,059 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -15 predicate places. [2023-08-26 18:47:14,059 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 103 flow [2023-08-26 18:47:14,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:14,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:14,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:47:14,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 18:47:14,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-26 18:47:14,265 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:47:14,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:14,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1124781391, now seen corresponding path program 1 times [2023-08-26 18:47:14,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:14,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837858011] [2023-08-26 18:47:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:14,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:14,410 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 18:47:14,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:14,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837858011] [2023-08-26 18:47:14,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837858011] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:47:14,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:47:14,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:47:14,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010165436] [2023-08-26 18:47:14,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:47:14,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:47:14,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:14,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:47:14,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:47:14,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 334 [2023-08-26 18:47:14,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 96.0) internal successors, (576), 6 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:14,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:14,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 334 [2023-08-26 18:47:14,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:47:14,621 INFO L124 PetriNetUnfolderBase]: 882/1490 cut-off events. [2023-08-26 18:47:14,621 INFO L125 PetriNetUnfolderBase]: For 625/625 co-relation queries the response was YES. [2023-08-26 18:47:14,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3462 conditions, 1490 events. 882/1490 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7278 event pairs, 614 based on Foata normal form. 0/1292 useless extension candidates. Maximal degree in co-relation 3259. Up to 1390 conditions per place. [2023-08-26 18:47:14,628 INFO L140 encePairwiseOnDemand]: 328/334 looper letters, 44 selfloop transitions, 2 changer transitions 6/56 dead transitions. [2023-08-26 18:47:14,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 252 flow [2023-08-26 18:47:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:47:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:47:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 434 transitions. [2023-08-26 18:47:14,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3248502994011976 [2023-08-26 18:47:14,631 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 434 transitions. [2023-08-26 18:47:14,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 434 transitions. [2023-08-26 18:47:14,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:47:14,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 434 transitions. [2023-08-26 18:47:14,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:14,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:14,635 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:14,635 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 103 flow. Second operand 4 states and 434 transitions. [2023-08-26 18:47:14,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 252 flow [2023-08-26 18:47:14,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 56 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-26 18:47:14,637 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 86 flow [2023-08-26 18:47:14,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-08-26 18:47:14,638 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -19 predicate places. [2023-08-26 18:47:14,639 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 86 flow [2023-08-26 18:47:14,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 96.0) internal successors, (576), 6 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:14,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:14,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:47:14,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 18:47:14,640 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:47:14,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:14,640 INFO L85 PathProgramCache]: Analyzing trace with hash -899532638, now seen corresponding path program 1 times [2023-08-26 18:47:14,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:14,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253154215] [2023-08-26 18:47:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:14,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 18:47:14,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:14,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253154215] [2023-08-26 18:47:14,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253154215] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:47:14,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344224186] [2023-08-26 18:47:14,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:14,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:47:14,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:47:14,828 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:47:14,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 18:47:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:14,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 18:47:14,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:47:14,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 18:47:14,928 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 18:47:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 18:47:14,991 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 18:47:14,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344224186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:47:14,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 18:47:14,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-26 18:47:14,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253583953] [2023-08-26 18:47:14,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:47:14,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:47:14,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:14,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:47:14,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:47:14,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 334 [2023-08-26 18:47:14,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:14,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:14,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 334 [2023-08-26 18:47:14,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:47:15,129 INFO L124 PetriNetUnfolderBase]: 515/953 cut-off events. [2023-08-26 18:47:15,129 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2023-08-26 18:47:15,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 953 events. 515/953 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4835 event pairs, 45 based on Foata normal form. 30/892 useless extension candidates. Maximal degree in co-relation 1689. Up to 770 conditions per place. [2023-08-26 18:47:15,135 INFO L140 encePairwiseOnDemand]: 330/334 looper letters, 34 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-26 18:47:15,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 181 flow [2023-08-26 18:47:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:47:15,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:47:15,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 505 transitions. [2023-08-26 18:47:15,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37799401197604793 [2023-08-26 18:47:15,138 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 505 transitions. [2023-08-26 18:47:15,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 505 transitions. [2023-08-26 18:47:15,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:47:15,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 505 transitions. [2023-08-26 18:47:15,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:15,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:15,142 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:15,142 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 86 flow. Second operand 4 states and 505 transitions. [2023-08-26 18:47:15,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 181 flow [2023-08-26 18:47:15,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 177 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:47:15,144 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 83 flow [2023-08-26 18:47:15,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=83, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2023-08-26 18:47:15,145 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -23 predicate places. [2023-08-26 18:47:15,145 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 83 flow [2023-08-26 18:47:15,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:15,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:15,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:47:15,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 18:47:15,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:47:15,354 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:47:15,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:15,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2115710637, now seen corresponding path program 1 times [2023-08-26 18:47:15,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:15,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37074278] [2023-08-26 18:47:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:15,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 18:47:15,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:15,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37074278] [2023-08-26 18:47:15,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37074278] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:47:15,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:47:15,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:47:15,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082899021] [2023-08-26 18:47:15,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:47:15,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:47:15,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:15,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:47:15,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:47:15,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 334 [2023-08-26 18:47:15,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 83 flow. Second operand has 6 states, 6 states have (on average 96.5) internal successors, (579), 6 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:15,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:15,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 334 [2023-08-26 18:47:15,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:47:15,638 INFO L124 PetriNetUnfolderBase]: 414/756 cut-off events. [2023-08-26 18:47:15,639 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2023-08-26 18:47:15,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1700 conditions, 756 events. 414/756 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3506 event pairs, 50 based on Foata normal form. 33/788 useless extension candidates. Maximal degree in co-relation 1387. Up to 595 conditions per place. [2023-08-26 18:47:15,640 INFO L140 encePairwiseOnDemand]: 328/334 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2023-08-26 18:47:15,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 173 flow [2023-08-26 18:47:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:47:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:47:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 418 transitions. [2023-08-26 18:47:15,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.312874251497006 [2023-08-26 18:47:15,642 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 418 transitions. [2023-08-26 18:47:15,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 418 transitions. [2023-08-26 18:47:15,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:47:15,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 418 transitions. [2023-08-26 18:47:15,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:15,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:15,646 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:15,646 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 83 flow. Second operand 4 states and 418 transitions. [2023-08-26 18:47:15,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 173 flow [2023-08-26 18:47:15,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:47:15,647 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-08-26 18:47:15,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-08-26 18:47:15,647 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -26 predicate places. [2023-08-26 18:47:15,647 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-08-26 18:47:15,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 96.5) internal successors, (579), 6 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:15,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 31 remaining) [2023-08-26 18:47:15,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 31 remaining) [2023-08-26 18:47:15,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 31 remaining) [2023-08-26 18:47:15,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 31 remaining) [2023-08-26 18:47:15,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 31 remaining) [2023-08-26 18:47:15,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 31 remaining) [2023-08-26 18:47:15,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 31 remaining) [2023-08-26 18:47:15,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 31 remaining) [2023-08-26 18:47:15,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 31 remaining) [2023-08-26 18:47:15,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 31 remaining) [2023-08-26 18:47:15,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 31 remaining) [2023-08-26 18:47:15,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 31 remaining) [2023-08-26 18:47:15,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 31 remaining) [2023-08-26 18:47:15,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 31 remaining) [2023-08-26 18:47:15,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 31 remaining) [2023-08-26 18:47:15,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 31 remaining) [2023-08-26 18:47:15,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 31 remaining) [2023-08-26 18:47:15,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 31 remaining) [2023-08-26 18:47:15,649 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 31 remaining) [2023-08-26 18:47:15,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 31 remaining) [2023-08-26 18:47:15,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 31 remaining) [2023-08-26 18:47:15,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 31 remaining) [2023-08-26 18:47:15,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 31 remaining) [2023-08-26 18:47:15,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (7 of 31 remaining) [2023-08-26 18:47:15,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 31 remaining) [2023-08-26 18:47:15,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 31 remaining) [2023-08-26 18:47:15,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 31 remaining) [2023-08-26 18:47:15,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 31 remaining) [2023-08-26 18:47:15,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 31 remaining) [2023-08-26 18:47:15,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 31 remaining) [2023-08-26 18:47:15,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 31 remaining) [2023-08-26 18:47:15,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 18:47:15,651 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:47:15,651 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-26 18:47:15,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 178 transitions, 374 flow [2023-08-26 18:47:15,678 INFO L124 PetriNetUnfolderBase]: 34/299 cut-off events. [2023-08-26 18:47:15,679 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:47:15,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 299 events. 34/299 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1088 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-08-26 18:47:15,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 178 transitions, 374 flow [2023-08-26 18:47:15,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 178 transitions, 374 flow [2023-08-26 18:47:15,682 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:47:15,682 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 178 transitions, 374 flow [2023-08-26 18:47:15,682 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 178 transitions, 374 flow [2023-08-26 18:47:15,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 178 transitions, 374 flow [2023-08-26 18:47:15,704 INFO L124 PetriNetUnfolderBase]: 34/299 cut-off events. [2023-08-26 18:47:15,705 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:47:15,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 299 events. 34/299 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1088 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-08-26 18:47:15,713 INFO L119 LiptonReduction]: Number of co-enabled transitions 12956 [2023-08-26 18:47:19,165 INFO L134 LiptonReduction]: Checked pairs total: 31236 [2023-08-26 18:47:19,165 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-26 18:47:19,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 18:47:19,167 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;@5fa6c564, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:47:19,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 18:47:19,173 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:47:19,174 INFO L124 PetriNetUnfolderBase]: 12/79 cut-off events. [2023-08-26 18:47:19,174 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 18:47:19,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:19,174 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 18:47:19,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 18:47:19,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:19,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1434958640, now seen corresponding path program 1 times [2023-08-26 18:47:19,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:19,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791667820] [2023-08-26 18:47:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:19,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:47:19,186 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 18:47:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:47:19,197 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 18:47:19,197 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 18:47:19,197 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 18:47:19,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 18:47:19,198 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 18:47:19,198 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-26 18:47:19,198 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 18:47:19,198 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 18:47:19,220 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 18:47:19,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 221 transitions, 472 flow [2023-08-26 18:47:19,267 INFO L124 PetriNetUnfolderBase]: 54/453 cut-off events. [2023-08-26 18:47:19,267 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 18:47:19,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 54/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1807 event pairs, 1 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 307. Up to 16 conditions per place. [2023-08-26 18:47:19,271 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 221 transitions, 472 flow [2023-08-26 18:47:19,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 221 transitions, 472 flow [2023-08-26 18:47:19,275 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:47:19,275 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 221 transitions, 472 flow [2023-08-26 18:47:19,275 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 221 transitions, 472 flow [2023-08-26 18:47:19,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 221 transitions, 472 flow [2023-08-26 18:47:19,319 INFO L124 PetriNetUnfolderBase]: 54/453 cut-off events. [2023-08-26 18:47:19,320 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 18:47:19,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 54/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1807 event pairs, 1 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 307. Up to 16 conditions per place. [2023-08-26 18:47:19,336 INFO L119 LiptonReduction]: Number of co-enabled transitions 24846 [2023-08-26 18:47:22,945 INFO L134 LiptonReduction]: Checked pairs total: 64582 [2023-08-26 18:47:22,945 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-26 18:47:22,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:47:22,947 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;@5fa6c564, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:47:22,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-08-26 18:47:22,948 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:47:22,948 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 18:47:22,948 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:47:22,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:22,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:47:22,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:47:22,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash 51779, now seen corresponding path program 1 times [2023-08-26 18:47:22,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:22,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258410996] [2023-08-26 18:47:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:22,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:47:22,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:22,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258410996] [2023-08-26 18:47:22,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258410996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:47:22,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:47:22,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:47:22,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682603375] [2023-08-26 18:47:22,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:47:22,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:47:22,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:22,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:47:22,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:47:22,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 405 [2023-08-26 18:47:22,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:22,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:22,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 405 [2023-08-26 18:47:22,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:47:39,306 INFO L124 PetriNetUnfolderBase]: 192998/267605 cut-off events. [2023-08-26 18:47:39,306 INFO L125 PetriNetUnfolderBase]: For 3319/3319 co-relation queries the response was YES. [2023-08-26 18:47:39,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535295 conditions, 267605 events. 192998/267605 cut-off events. For 3319/3319 co-relation queries the response was YES. Maximal size of possible extension queue 7395. Compared 2028705 event pairs, 178887 based on Foata normal form. 12868/178040 useless extension candidates. Maximal degree in co-relation 119058. Up to 246524 conditions per place. [2023-08-26 18:47:40,909 INFO L140 encePairwiseOnDemand]: 374/405 looper letters, 112 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2023-08-26 18:47:40,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 122 transitions, 502 flow [2023-08-26 18:47:40,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:47:40,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:47:40,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2023-08-26 18:47:40,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5004115226337449 [2023-08-26 18:47:40,913 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2023-08-26 18:47:40,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2023-08-26 18:47:40,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:47:40,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2023-08-26 18:47:40,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:40,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:40,917 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:40,917 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 240 flow. Second operand 3 states and 608 transitions. [2023-08-26 18:47:40,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 122 transitions, 502 flow [2023-08-26 18:47:40,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 122 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:47:40,927 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 186 flow [2023-08-26 18:47:40,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2023-08-26 18:47:40,929 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -6 predicate places. [2023-08-26 18:47:40,929 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 186 flow [2023-08-26 18:47:40,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:40,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:40,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:47:40,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 18:47:40,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:47:40,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:40,930 INFO L85 PathProgramCache]: Analyzing trace with hash 51778, now seen corresponding path program 1 times [2023-08-26 18:47:40,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:40,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902119813] [2023-08-26 18:47:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:40,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:40,968 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 18:47:40,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:40,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902119813] [2023-08-26 18:47:40,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902119813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:47:40,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:47:40,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:47:40,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621424526] [2023-08-26 18:47:40,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:47:40,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:47:40,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:40,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:47:40,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:47:40,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 405 [2023-08-26 18:47:40,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:40,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:40,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 405 [2023-08-26 18:47:40,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:47:51,883 INFO L124 PetriNetUnfolderBase]: 130453/187200 cut-off events. [2023-08-26 18:47:51,883 INFO L125 PetriNetUnfolderBase]: For 5627/5627 co-relation queries the response was YES. [2023-08-26 18:47:52,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372715 conditions, 187200 events. 130453/187200 cut-off events. For 5627/5627 co-relation queries the response was YES. Maximal size of possible extension queue 5324. Compared 1459236 event pairs, 85181 based on Foata normal form. 0/134458 useless extension candidates. Maximal degree in co-relation 342734. Up to 180150 conditions per place. [2023-08-26 18:47:52,706 INFO L140 encePairwiseOnDemand]: 401/405 looper letters, 75 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-26 18:47:52,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 91 transitions, 370 flow [2023-08-26 18:47:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:47:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:47:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-08-26 18:47:52,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4156378600823045 [2023-08-26 18:47:52,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-08-26 18:47:52,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-08-26 18:47:52,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:47:52,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-08-26 18:47:52,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:52,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:52,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 405.0) internal successors, (1620), 4 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:52,712 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 186 flow. Second operand 3 states and 505 transitions. [2023-08-26 18:47:52,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 91 transitions, 370 flow [2023-08-26 18:47:53,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 91 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:47:53,065 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 196 flow [2023-08-26 18:47:53,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2023-08-26 18:47:53,066 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -5 predicate places. [2023-08-26 18:47:53,066 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 196 flow [2023-08-26 18:47:53,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:53,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:47:53,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:47:53,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 18:47:53,067 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:47:53,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:47:53,067 INFO L85 PathProgramCache]: Analyzing trace with hash 615806955, now seen corresponding path program 1 times [2023-08-26 18:47:53,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:47:53,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033898373] [2023-08-26 18:47:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:47:53,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:47:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:47:53,140 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 18:47:53,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:47:53,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033898373] [2023-08-26 18:47:53,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033898373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:47:53,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:47:53,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:47:53,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71155275] [2023-08-26 18:47:53,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:47:53,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:47:53,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:47:53,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:47:53,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:47:53,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 405 [2023-08-26 18:47:53,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:47:53,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:47:53,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 405 [2023-08-26 18:47:53,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:48:03,002 INFO L124 PetriNetUnfolderBase]: 121872/175071 cut-off events. [2023-08-26 18:48:03,002 INFO L125 PetriNetUnfolderBase]: For 9042/9042 co-relation queries the response was YES. [2023-08-26 18:48:03,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354525 conditions, 175071 events. 121872/175071 cut-off events. For 9042/9042 co-relation queries the response was YES. Maximal size of possible extension queue 4669. Compared 1422343 event pairs, 5292 based on Foata normal form. 3240/127433 useless extension candidates. Maximal degree in co-relation 354424. Up to 147314 conditions per place. [2023-08-26 18:48:03,767 INFO L140 encePairwiseOnDemand]: 399/405 looper letters, 170 selfloop transitions, 5 changer transitions 0/187 dead transitions. [2023-08-26 18:48:03,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 187 transitions, 793 flow [2023-08-26 18:48:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:48:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:48:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1007 transitions. [2023-08-26 18:48:03,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41440329218106997 [2023-08-26 18:48:03,770 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1007 transitions. [2023-08-26 18:48:03,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1007 transitions. [2023-08-26 18:48:03,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:48:03,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1007 transitions. [2023-08-26 18:48:03,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 167.83333333333334) internal successors, (1007), 6 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:03,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 405.0) internal successors, (2835), 7 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:03,777 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 405.0) internal successors, (2835), 7 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:03,777 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 196 flow. Second operand 6 states and 1007 transitions. [2023-08-26 18:48:03,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 187 transitions, 793 flow [2023-08-26 18:48:03,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 187 transitions, 790 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:48:03,792 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 202 flow [2023-08-26 18:48:03,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2023-08-26 18:48:03,793 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -4 predicate places. [2023-08-26 18:48:03,793 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 202 flow [2023-08-26 18:48:03,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:03,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:48:03,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:48:03,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 18:48:03,793 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:48:03,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:48:03,794 INFO L85 PathProgramCache]: Analyzing trace with hash 615494052, now seen corresponding path program 1 times [2023-08-26 18:48:03,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:48:03,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972915] [2023-08-26 18:48:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:03,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:48:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:48:03,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:48:03,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972915] [2023-08-26 18:48:03,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:48:03,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767559361] [2023-08-26 18:48:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:03,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:48:03,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:48:03,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:48:03,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 18:48:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:03,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 18:48:03,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:48:03,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 18:48:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:48:03,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:48:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:48:04,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767559361] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:48:04,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:48:04,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 18:48:04,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859967607] [2023-08-26 18:48:04,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:48:04,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:48:04,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:48:04,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:48:04,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:48:04,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 405 [2023-08-26 18:48:04,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 202 flow. Second operand has 8 states, 8 states have (on average 143.875) internal successors, (1151), 8 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:04,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:48:04,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 405 [2023-08-26 18:48:04,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:48:05,981 INFO L124 PetriNetUnfolderBase]: 19450/30809 cut-off events. [2023-08-26 18:48:05,981 INFO L125 PetriNetUnfolderBase]: For 11450/11450 co-relation queries the response was YES. [2023-08-26 18:48:06,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70015 conditions, 30809 events. 19450/30809 cut-off events. For 11450/11450 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 236910 event pairs, 0 based on Foata normal form. 2700/28414 useless extension candidates. Maximal degree in co-relation 63434. Up to 19044 conditions per place. [2023-08-26 18:48:06,123 INFO L140 encePairwiseOnDemand]: 401/405 looper letters, 118 selfloop transitions, 4 changer transitions 0/135 dead transitions. [2023-08-26 18:48:06,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 135 transitions, 553 flow [2023-08-26 18:48:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:48:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:48:06,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 980 transitions. [2023-08-26 18:48:06,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40329218106995884 [2023-08-26 18:48:06,127 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 980 transitions. [2023-08-26 18:48:06,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 980 transitions. [2023-08-26 18:48:06,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:48:06,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 980 transitions. [2023-08-26 18:48:06,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.33333333333334) internal successors, (980), 6 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:06,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 405.0) internal successors, (2835), 7 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:06,133 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 405.0) internal successors, (2835), 7 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:06,133 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 202 flow. Second operand 6 states and 980 transitions. [2023-08-26 18:48:06,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 135 transitions, 553 flow [2023-08-26 18:48:06,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 135 transitions, 541 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-26 18:48:06,150 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 150 flow [2023-08-26 18:48:06,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2023-08-26 18:48:06,150 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -16 predicate places. [2023-08-26 18:48:06,150 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 150 flow [2023-08-26 18:48:06,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 143.875) internal successors, (1151), 8 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:06,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:48:06,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:48:06,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 18:48:06,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 18:48:06,355 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:48:06,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:48:06,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1910146249, now seen corresponding path program 1 times [2023-08-26 18:48:06,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:48:06,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251537833] [2023-08-26 18:48:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:06,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:48:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:06,415 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 18:48:06,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:48:06,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251537833] [2023-08-26 18:48:06,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251537833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:48:06,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:48:06,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:48:06,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904301768] [2023-08-26 18:48:06,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:48:06,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:48:06,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:48:06,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:48:06,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:48:06,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 405 [2023-08-26 18:48:06,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:06,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:48:06,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 405 [2023-08-26 18:48:06,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:48:08,100 INFO L124 PetriNetUnfolderBase]: 20864/29863 cut-off events. [2023-08-26 18:48:08,101 INFO L125 PetriNetUnfolderBase]: For 9176/9176 co-relation queries the response was YES. [2023-08-26 18:48:08,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66572 conditions, 29863 events. 20864/29863 cut-off events. For 9176/9176 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 193322 event pairs, 7067 based on Foata normal form. 0/24275 useless extension candidates. Maximal degree in co-relation 66381. Up to 27360 conditions per place. [2023-08-26 18:48:08,226 INFO L140 encePairwiseOnDemand]: 399/405 looper letters, 83 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-26 18:48:08,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 408 flow [2023-08-26 18:48:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:48:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:48:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 633 transitions. [2023-08-26 18:48:08,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907407407407407 [2023-08-26 18:48:08,228 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 633 transitions. [2023-08-26 18:48:08,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 633 transitions. [2023-08-26 18:48:08,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:48:08,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 633 transitions. [2023-08-26 18:48:08,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:08,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 405.0) internal successors, (2025), 5 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:08,232 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 405.0) internal successors, (2025), 5 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:08,232 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 150 flow. Second operand 4 states and 633 transitions. [2023-08-26 18:48:08,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 408 flow [2023-08-26 18:48:08,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 393 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 18:48:08,235 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 137 flow [2023-08-26 18:48:08,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2023-08-26 18:48:08,235 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -20 predicate places. [2023-08-26 18:48:08,235 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 137 flow [2023-08-26 18:48:08,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:08,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:48:08,236 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:48:08,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 18:48:08,236 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:48:08,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:48:08,236 INFO L85 PathProgramCache]: Analyzing trace with hash -16963880, now seen corresponding path program 1 times [2023-08-26 18:48:08,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:48:08,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123287785] [2023-08-26 18:48:08,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:08,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:48:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 18:48:08,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:48:08,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123287785] [2023-08-26 18:48:08,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123287785] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:48:08,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100512901] [2023-08-26 18:48:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:08,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:48:08,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:48:08,324 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:48:08,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 18:48:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:08,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 18:48:08,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:48:08,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 18:48:08,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 18:48:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 18:48:08,474 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 18:48:08,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100512901] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:48:08,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 18:48:08,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-26 18:48:08,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132621659] [2023-08-26 18:48:08,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:48:08,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:48:08,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:48:08,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:48:08,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:48:08,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 405 [2023-08-26 18:48:08,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:08,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:48:08,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 405 [2023-08-26 18:48:08,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:48:09,930 INFO L124 PetriNetUnfolderBase]: 16096/23907 cut-off events. [2023-08-26 18:48:09,930 INFO L125 PetriNetUnfolderBase]: For 3366/3366 co-relation queries the response was YES. [2023-08-26 18:48:09,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50822 conditions, 23907 events. 16096/23907 cut-off events. For 3366/3366 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 163313 event pairs, 730 based on Foata normal form. 480/20783 useless extension candidates. Maximal degree in co-relation 44291. Up to 21606 conditions per place. [2023-08-26 18:48:10,026 INFO L140 encePairwiseOnDemand]: 401/405 looper letters, 69 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-26 18:48:10,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 341 flow [2023-08-26 18:48:10,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:48:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:48:10,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 642 transitions. [2023-08-26 18:48:10,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3962962962962963 [2023-08-26 18:48:10,028 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 642 transitions. [2023-08-26 18:48:10,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 642 transitions. [2023-08-26 18:48:10,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:48:10,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 642 transitions. [2023-08-26 18:48:10,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.5) internal successors, (642), 4 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:10,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 405.0) internal successors, (2025), 5 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:10,032 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 405.0) internal successors, (2025), 5 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:10,032 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 137 flow. Second operand 4 states and 642 transitions. [2023-08-26 18:48:10,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 341 flow [2023-08-26 18:48:10,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 337 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:48:10,036 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 134 flow [2023-08-26 18:48:10,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2023-08-26 18:48:10,036 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -21 predicate places. [2023-08-26 18:48:10,036 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 134 flow [2023-08-26 18:48:10,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:10,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:48:10,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:48:10,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 18:48:10,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:48:10,242 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:48:10,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:48:10,242 INFO L85 PathProgramCache]: Analyzing trace with hash -525886010, now seen corresponding path program 1 times [2023-08-26 18:48:10,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:48:10,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092025256] [2023-08-26 18:48:10,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:10,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:48:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:48:10,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:48:10,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092025256] [2023-08-26 18:48:10,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092025256] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:48:10,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002456795] [2023-08-26 18:48:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:10,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:48:10,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:48:10,325 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:48:10,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 18:48:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:10,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 18:48:10,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:48:10,422 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-26 18:48:10,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-26 18:48:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 18:48:10,456 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 18:48:10,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002456795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:48:10,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 18:48:10,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-26 18:48:10,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861100184] [2023-08-26 18:48:10,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:48:10,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:48:10,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:48:10,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:48:10,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:48:10,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 405 [2023-08-26 18:48:10,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 142.75) internal successors, (571), 4 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:10,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:48:10,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 405 [2023-08-26 18:48:10,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:48:11,524 INFO L124 PetriNetUnfolderBase]: 12848/18508 cut-off events. [2023-08-26 18:48:11,524 INFO L125 PetriNetUnfolderBase]: For 2669/2669 co-relation queries the response was YES. [2023-08-26 18:48:11,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40571 conditions, 18508 events. 12848/18508 cut-off events. For 2669/2669 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 109989 event pairs, 4424 based on Foata normal form. 0/16704 useless extension candidates. Maximal degree in co-relation 35330. Up to 16884 conditions per place. [2023-08-26 18:48:11,588 INFO L140 encePairwiseOnDemand]: 399/405 looper letters, 63 selfloop transitions, 2 changer transitions 6/78 dead transitions. [2023-08-26 18:48:11,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 337 flow [2023-08-26 18:48:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:48:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:48:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 636 transitions. [2023-08-26 18:48:11,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2023-08-26 18:48:11,590 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 636 transitions. [2023-08-26 18:48:11,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 636 transitions. [2023-08-26 18:48:11,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:48:11,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 636 transitions. [2023-08-26 18:48:11,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:11,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 405.0) internal successors, (2025), 5 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:11,595 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 405.0) internal successors, (2025), 5 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:11,595 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 134 flow. Second operand 4 states and 636 transitions. [2023-08-26 18:48:11,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 337 flow [2023-08-26 18:48:11,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:48:11,597 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 121 flow [2023-08-26 18:48:11,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-08-26 18:48:11,597 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -24 predicate places. [2023-08-26 18:48:11,598 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 121 flow [2023-08-26 18:48:11,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.75) internal successors, (571), 4 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:11,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:48:11,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:48:11,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 18:48:11,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:48:11,806 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:48:11,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:48:11,806 INFO L85 PathProgramCache]: Analyzing trace with hash 2146021940, now seen corresponding path program 1 times [2023-08-26 18:48:11,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:48:11,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791941414] [2023-08-26 18:48:11,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:11,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:48:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-26 18:48:11,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:48:11,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791941414] [2023-08-26 18:48:11,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791941414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:48:11,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473211498] [2023-08-26 18:48:11,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:11,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:48:11,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:48:11,927 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:48:11,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 18:48:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:12,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 18:48:12,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:48:12,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 18:48:12,034 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 18:48:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 18:48:12,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 18:48:12,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473211498] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:48:12,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 18:48:12,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-26 18:48:12,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883665702] [2023-08-26 18:48:12,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:48:12,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:48:12,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:48:12,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:48:12,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:48:12,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 405 [2023-08-26 18:48:12,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:12,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:48:12,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 405 [2023-08-26 18:48:12,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:48:12,842 INFO L124 PetriNetUnfolderBase]: 9148/13465 cut-off events. [2023-08-26 18:48:12,842 INFO L125 PetriNetUnfolderBase]: For 2019/2019 co-relation queries the response was YES. [2023-08-26 18:48:12,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29782 conditions, 13465 events. 9148/13465 cut-off events. For 2019/2019 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 81780 event pairs, 1008 based on Foata normal form. 0/12553 useless extension candidates. Maximal degree in co-relation 25916. Up to 11440 conditions per place. [2023-08-26 18:48:12,898 INFO L140 encePairwiseOnDemand]: 401/405 looper letters, 55 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-26 18:48:12,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 64 transitions, 278 flow [2023-08-26 18:48:12,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:48:12,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:48:12,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 629 transitions. [2023-08-26 18:48:12,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3882716049382716 [2023-08-26 18:48:12,900 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 629 transitions. [2023-08-26 18:48:12,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 629 transitions. [2023-08-26 18:48:12,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:48:12,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 629 transitions. [2023-08-26 18:48:12,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:12,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 405.0) internal successors, (2025), 5 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:12,904 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 405.0) internal successors, (2025), 5 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:12,904 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 121 flow. Second operand 4 states and 629 transitions. [2023-08-26 18:48:12,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 64 transitions, 278 flow [2023-08-26 18:48:12,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:48:12,906 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 118 flow [2023-08-26 18:48:12,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-08-26 18:48:12,907 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -28 predicate places. [2023-08-26 18:48:12,907 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 118 flow [2023-08-26 18:48:12,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:12,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:48:12,907 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:48:12,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 18:48:13,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:48:13,112 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:48:13,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:48:13,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2102168410, now seen corresponding path program 1 times [2023-08-26 18:48:13,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:48:13,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335879562] [2023-08-26 18:48:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:13,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:48:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-26 18:48:13,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:48:13,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335879562] [2023-08-26 18:48:13,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335879562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:48:13,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409087808] [2023-08-26 18:48:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:13,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:48:13,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:48:13,205 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:48:13,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 18:48:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:13,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 18:48:13,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:48:13,310 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-26 18:48:13,310 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-26 18:48:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 18:48:13,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 18:48:13,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409087808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:48:13,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 18:48:13,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-26 18:48:13,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533877589] [2023-08-26 18:48:13,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:48:13,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:48:13,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:48:13,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:48:13,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:48:13,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 405 [2023-08-26 18:48:13,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:13,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:48:13,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 405 [2023-08-26 18:48:13,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:48:13,918 INFO L124 PetriNetUnfolderBase]: 6188/9305 cut-off events. [2023-08-26 18:48:13,919 INFO L125 PetriNetUnfolderBase]: For 1511/1511 co-relation queries the response was YES. [2023-08-26 18:48:13,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20882 conditions, 9305 events. 6188/9305 cut-off events. For 1511/1511 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 55083 event pairs, 1008 based on Foata normal form. 300/9593 useless extension candidates. Maximal degree in co-relation 18146. Up to 7280 conditions per place. [2023-08-26 18:48:13,929 INFO L140 encePairwiseOnDemand]: 399/405 looper letters, 0 selfloop transitions, 0 changer transitions 60/60 dead transitions. [2023-08-26 18:48:13,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 262 flow [2023-08-26 18:48:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:48:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:48:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 619 transitions. [2023-08-26 18:48:13,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38209876543209875 [2023-08-26 18:48:13,931 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 619 transitions. [2023-08-26 18:48:13,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 619 transitions. [2023-08-26 18:48:13,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:48:13,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 619 transitions. [2023-08-26 18:48:13,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:13,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 405.0) internal successors, (2025), 5 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:13,935 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 405.0) internal successors, (2025), 5 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:13,935 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 118 flow. Second operand 4 states and 619 transitions. [2023-08-26 18:48:13,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 262 flow [2023-08-26 18:48:13,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 60 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:48:13,939 INFO L231 Difference]: Finished difference. Result has 57 places, 0 transitions, 0 flow [2023-08-26 18:48:13,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=405, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=57, PETRI_TRANSITIONS=0} [2023-08-26 18:48:13,939 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -31 predicate places. [2023-08-26 18:48:13,939 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 0 transitions, 0 flow [2023-08-26 18:48:13,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:13,940 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 39 remaining) [2023-08-26 18:48:13,940 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2023-08-26 18:48:13,940 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2023-08-26 18:48:13,940 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2023-08-26 18:48:13,940 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2023-08-26 18:48:13,940 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2023-08-26 18:48:13,940 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2023-08-26 18:48:13,940 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2023-08-26 18:48:13,941 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2023-08-26 18:48:13,941 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2023-08-26 18:48:13,941 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2023-08-26 18:48:13,941 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2023-08-26 18:48:13,941 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2023-08-26 18:48:13,941 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2023-08-26 18:48:13,941 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2023-08-26 18:48:13,941 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2023-08-26 18:48:13,941 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 39 remaining) [2023-08-26 18:48:13,941 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2023-08-26 18:48:13,941 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2023-08-26 18:48:13,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2023-08-26 18:48:13,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2023-08-26 18:48:13,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2023-08-26 18:48:13,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2023-08-26 18:48:13,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2023-08-26 18:48:13,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2023-08-26 18:48:13,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2023-08-26 18:48:13,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2023-08-26 18:48:13,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 39 remaining) [2023-08-26 18:48:13,942 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2023-08-26 18:48:13,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (9 of 39 remaining) [2023-08-26 18:48:13,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2023-08-26 18:48:13,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2023-08-26 18:48:13,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2023-08-26 18:48:13,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2023-08-26 18:48:13,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2023-08-26 18:48:13,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2023-08-26 18:48:13,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2023-08-26 18:48:13,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2023-08-26 18:48:13,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 39 remaining) [2023-08-26 18:48:13,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 18:48:14,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-26 18:48:14,148 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:48:14,149 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-26 18:48:14,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 221 transitions, 472 flow [2023-08-26 18:48:14,179 INFO L124 PetriNetUnfolderBase]: 54/453 cut-off events. [2023-08-26 18:48:14,179 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 18:48:14,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 54/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1807 event pairs, 1 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 307. Up to 16 conditions per place. [2023-08-26 18:48:14,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 221 transitions, 472 flow [2023-08-26 18:48:14,183 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 221 transitions, 472 flow [2023-08-26 18:48:14,183 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:48:14,183 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 221 transitions, 472 flow [2023-08-26 18:48:14,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 221 transitions, 472 flow [2023-08-26 18:48:14,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 221 transitions, 472 flow [2023-08-26 18:48:14,209 INFO L124 PetriNetUnfolderBase]: 54/453 cut-off events. [2023-08-26 18:48:14,209 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 18:48:14,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 54/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1807 event pairs, 1 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 307. Up to 16 conditions per place. [2023-08-26 18:48:14,221 INFO L119 LiptonReduction]: Number of co-enabled transitions 24846 [2023-08-26 18:48:17,894 INFO L134 LiptonReduction]: Checked pairs total: 72064 [2023-08-26 18:48:17,894 INFO L136 LiptonReduction]: Total number of compositions: 182 [2023-08-26 18:48:17,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 18:48:17,896 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;@5fa6c564, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:48:17,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 18:48:17,904 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:48:17,904 INFO L124 PetriNetUnfolderBase]: 19/125 cut-off events. [2023-08-26 18:48:17,904 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 18:48:17,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:48:17,905 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 18:48:17,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 18:48:17,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:48:17,905 INFO L85 PathProgramCache]: Analyzing trace with hash -354393911, now seen corresponding path program 1 times [2023-08-26 18:48:17,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:48:17,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278307248] [2023-08-26 18:48:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:17,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:48:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:48:17,915 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 18:48:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:48:17,926 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 18:48:17,926 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 18:48:17,927 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 18:48:17,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 18:48:17,927 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 18:48:17,927 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-26 18:48:17,927 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 18:48:17,927 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 18:48:17,961 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 18:48:17,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 264 transitions, 572 flow [2023-08-26 18:48:18,037 INFO L124 PetriNetUnfolderBase]: 86/683 cut-off events. [2023-08-26 18:48:18,038 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 18:48:18,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 683 events. 86/683 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3058 event pairs, 6 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 473. Up to 32 conditions per place. [2023-08-26 18:48:18,044 INFO L82 GeneralOperation]: Start removeDead. Operand has 239 places, 264 transitions, 572 flow [2023-08-26 18:48:18,050 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 264 transitions, 572 flow [2023-08-26 18:48:18,050 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:48:18,050 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 239 places, 264 transitions, 572 flow [2023-08-26 18:48:18,050 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 239 places, 264 transitions, 572 flow [2023-08-26 18:48:18,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 264 transitions, 572 flow [2023-08-26 18:48:18,125 INFO L124 PetriNetUnfolderBase]: 86/683 cut-off events. [2023-08-26 18:48:18,126 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 18:48:18,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 683 events. 86/683 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3058 event pairs, 6 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 473. Up to 32 conditions per place. [2023-08-26 18:48:18,154 INFO L119 LiptonReduction]: Number of co-enabled transitions 40344 [2023-08-26 18:48:22,342 INFO L134 LiptonReduction]: Checked pairs total: 126448 [2023-08-26 18:48:22,343 INFO L136 LiptonReduction]: Total number of compositions: 223 [2023-08-26 18:48:22,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:48:22,344 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;@5fa6c564, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:48:22,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-08-26 18:48:22,345 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:48:22,345 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 18:48:22,345 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:48:22,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:48:22,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:48:22,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-26 18:48:22,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:48:22,346 INFO L85 PathProgramCache]: Analyzing trace with hash 74589, now seen corresponding path program 1 times [2023-08-26 18:48:22,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:48:22,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182182789] [2023-08-26 18:48:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:22,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:48:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:22,374 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 18:48:22,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:48:22,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182182789] [2023-08-26 18:48:22,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182182789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:48:22,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:48:22,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:48:22,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500309711] [2023-08-26 18:48:22,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:48:22,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:48:22,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:48:22,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:48:22,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:48:22,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 487 [2023-08-26 18:48:22,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 131 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:22,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:48:22,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 487 [2023-08-26 18:48:22,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand