/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/parallel-ticket-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:24:04,602 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:24:04,658 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 13:24:04,665 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:24:04,665 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:24:04,690 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:24:04,690 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:24:04,690 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:24:04,691 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:24:04,694 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:24:04,694 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:24:04,694 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:24:04,694 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:24:04,695 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:24:04,695 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:24:04,695 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:24:04,695 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:24:04,696 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:24:04,696 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:24:04,696 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:24:04,696 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:24:04,697 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:24:04,697 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:24:04,697 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:24:04,697 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:24:04,697 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:24:04,698 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:24:04,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:24:04,698 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:24:04,698 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:24:04,699 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:24:04,699 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:24:04,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:24:04,699 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:24:04,699 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:24:04,699 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:24:04,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:24:04,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:24:04,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:24:04,960 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:24:04,960 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:24:04,961 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-ticket-2.wvr.c [2023-08-26 13:24:06,077 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:24:06,318 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:24:06,318 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-2.wvr.c [2023-08-26 13:24:06,324 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efcb0b0b0/d7db42737d5848b9bb3bad3f6b9b5792/FLAGfada65768 [2023-08-26 13:24:06,349 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efcb0b0b0/d7db42737d5848b9bb3bad3f6b9b5792 [2023-08-26 13:24:06,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:24:06,354 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:24:06,356 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:24:06,356 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:24:06,358 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:24:06,358 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:24:06" (1/1) ... [2023-08-26 13:24:06,359 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be6307e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:06, skipping insertion in model container [2023-08-26 13:24:06,359 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:24:06" (1/1) ... [2023-08-26 13:24:06,390 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:24:06,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:24:06,544 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:24:06,570 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:24:06,576 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:24:06,576 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:24:06,580 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:24:06,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:06 WrapperNode [2023-08-26 13:24:06,581 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:24:06,582 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:24:06,582 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:24:06,582 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:24:06,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:06" (1/1) ... [2023-08-26 13:24:06,596 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:06" (1/1) ... [2023-08-26 13:24:06,616 INFO L138 Inliner]: procedures = 21, calls = 41, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 126 [2023-08-26 13:24:06,617 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:24:06,617 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:24:06,617 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:24:06,617 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:24:06,623 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:06" (1/1) ... [2023-08-26 13:24:06,623 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:06" (1/1) ... [2023-08-26 13:24:06,624 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:06" (1/1) ... [2023-08-26 13:24:06,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:06" (1/1) ... [2023-08-26 13:24:06,627 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:06" (1/1) ... [2023-08-26 13:24:06,628 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:06" (1/1) ... [2023-08-26 13:24:06,629 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:06" (1/1) ... [2023-08-26 13:24:06,629 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:06" (1/1) ... [2023-08-26 13:24:06,631 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:24:06,631 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:24:06,631 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:24:06,631 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:24:06,632 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:06" (1/1) ... [2023-08-26 13:24:06,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:24:06,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:24:06,650 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 13:24:06,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 13:24:06,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:24:06,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:24:06,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:24:06,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:24:06,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:24:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:24:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:24:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:24:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 13:24:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 13:24:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:24:06,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:24:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:24:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:24:06,684 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 13:24:06,742 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:24:06,743 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:24:06,955 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:24:07,003 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:24:07,003 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 13:24:07,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:24:07 BoogieIcfgContainer [2023-08-26 13:24:07,005 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:24:07,006 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:24:07,006 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:24:07,010 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:24:07,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:24:06" (1/3) ... [2023-08-26 13:24:07,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f3fed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:24:07, skipping insertion in model container [2023-08-26 13:24:07,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:24:06" (2/3) ... [2023-08-26 13:24:07,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f3fed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:24:07, skipping insertion in model container [2023-08-26 13:24:07,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:24:07" (3/3) ... [2023-08-26 13:24:07,012 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-2.wvr.c [2023-08-26 13:24:07,023 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:24:07,023 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 13:24:07,023 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:24:07,078 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 13:24:07,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 104 transitions, 224 flow [2023-08-26 13:24:07,132 INFO L124 PetriNetUnfolderBase]: 2/102 cut-off events. [2023-08-26 13:24:07,132 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:24:07,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 2/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 68. Up to 2 conditions per place. [2023-08-26 13:24:07,134 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 104 transitions, 224 flow [2023-08-26 13:24:07,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 93 transitions, 198 flow [2023-08-26 13:24:07,142 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:24:07,149 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 93 transitions, 198 flow [2023-08-26 13:24:07,152 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 93 transitions, 198 flow [2023-08-26 13:24:07,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 93 transitions, 198 flow [2023-08-26 13:24:07,169 INFO L124 PetriNetUnfolderBase]: 2/93 cut-off events. [2023-08-26 13:24:07,170 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:24:07,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 2/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 68. Up to 2 conditions per place. [2023-08-26 13:24:07,171 INFO L119 LiptonReduction]: Number of co-enabled transitions 386 [2023-08-26 13:24:09,607 INFO L134 LiptonReduction]: Checked pairs total: 2001 [2023-08-26 13:24:09,607 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-08-26 13:24:09,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:24:09,620 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;@9520448, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:24:09,620 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 13:24:09,621 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:24:09,621 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 13:24:09,621 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:24:09,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:09,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:24:09,622 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:24:09,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash 402, now seen corresponding path program 1 times [2023-08-26 13:24:09,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:09,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475960580] [2023-08-26 13:24:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:09,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:24:09,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:09,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475960580] [2023-08-26 13:24:09,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475960580] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:09,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:09,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:24:09,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213200259] [2023-08-26 13:24:09,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:09,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:24:09,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:09,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:24:09,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:24:09,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 192 [2023-08-26 13:24:09,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:09,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:09,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 192 [2023-08-26 13:24:09,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:09,765 INFO L124 PetriNetUnfolderBase]: 105/228 cut-off events. [2023-08-26 13:24:09,765 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-26 13:24:09,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 228 events. 105/228 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 923 event pairs, 105 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 376. Up to 205 conditions per place. [2023-08-26 13:24:09,768 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 21 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2023-08-26 13:24:09,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 24 transitions, 102 flow [2023-08-26 13:24:09,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:24:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:24:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 205 transitions. [2023-08-26 13:24:09,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2023-08-26 13:24:09,777 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 205 transitions. [2023-08-26 13:24:09,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 205 transitions. [2023-08-26 13:24:09,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:09,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 205 transitions. [2023-08-26 13:24:09,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:09,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 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 13:24:09,783 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 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 13:24:09,784 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 64 flow. Second operand 2 states and 205 transitions. [2023-08-26 13:24:09,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 24 transitions, 102 flow [2023-08-26 13:24:09,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 13:24:09,787 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 52 flow [2023-08-26 13:24:09,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-08-26 13:24:09,790 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -5 predicate places. [2023-08-26 13:24:09,790 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 52 flow [2023-08-26 13:24:09,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:09,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:09,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:24:09,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:24:09,791 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:24:09,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:09,791 INFO L85 PathProgramCache]: Analyzing trace with hash 396348, now seen corresponding path program 1 times [2023-08-26 13:24:09,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:09,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109925493] [2023-08-26 13:24:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:09,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:24:09,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:09,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109925493] [2023-08-26 13:24:09,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109925493] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:09,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:09,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:24:09,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847512303] [2023-08-26 13:24:09,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:09,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:24:09,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:09,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:24:09,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:24:09,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 192 [2023-08-26 13:24:09,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:09,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:09,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 192 [2023-08-26 13:24:09,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:09,980 INFO L124 PetriNetUnfolderBase]: 99/212 cut-off events. [2023-08-26 13:24:09,981 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:24:09,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 212 events. 99/212 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 838 event pairs, 99 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 407. Up to 190 conditions per place. [2023-08-26 13:24:09,982 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 18 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-26 13:24:09,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 22 transitions, 86 flow [2023-08-26 13:24:09,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2023-08-26 13:24:09,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4114583333333333 [2023-08-26 13:24:09,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 237 transitions. [2023-08-26 13:24:09,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 237 transitions. [2023-08-26 13:24:09,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:09,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 237 transitions. [2023-08-26 13:24:09,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:09,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:09,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:09,987 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 52 flow. Second operand 3 states and 237 transitions. [2023-08-26 13:24:09,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 22 transitions, 86 flow [2023-08-26 13:24:09,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 22 transitions, 86 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:24:09,988 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 50 flow [2023-08-26 13:24:09,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-26 13:24:09,988 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -5 predicate places. [2023-08-26 13:24:09,988 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 50 flow [2023-08-26 13:24:09,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:09,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:09,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:24:09,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:24:09,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:24:09,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:09,990 INFO L85 PathProgramCache]: Analyzing trace with hash 396349, now seen corresponding path program 1 times [2023-08-26 13:24:09,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:09,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885164222] [2023-08-26 13:24:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:09,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:24:10,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:10,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885164222] [2023-08-26 13:24:10,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885164222] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:10,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:10,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:24:10,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510246504] [2023-08-26 13:24:10,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:10,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:24:10,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:10,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:24:10,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:24:10,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 192 [2023-08-26 13:24:10,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:10,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 192 [2023-08-26 13:24:10,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:10,105 INFO L124 PetriNetUnfolderBase]: 93/196 cut-off events. [2023-08-26 13:24:10,105 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:24:10,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 196 events. 93/196 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 757 event pairs, 93 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 378. Up to 176 conditions per place. [2023-08-26 13:24:10,108 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 16 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-26 13:24:10,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 80 flow [2023-08-26 13:24:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2023-08-26 13:24:10,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4184027777777778 [2023-08-26 13:24:10,111 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2023-08-26 13:24:10,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2023-08-26 13:24:10,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:10,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2023-08-26 13:24:10,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,114 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 50 flow. Second operand 3 states and 241 transitions. [2023-08-26 13:24:10,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 80 flow [2023-08-26 13:24:10,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 20 transitions, 79 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:10,115 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 47 flow [2023-08-26 13:24:10,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-26 13:24:10,116 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -6 predicate places. [2023-08-26 13:24:10,116 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 47 flow [2023-08-26 13:24:10,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:10,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:24:10,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:24:10,119 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:24:10,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:10,119 INFO L85 PathProgramCache]: Analyzing trace with hash 380898567, now seen corresponding path program 1 times [2023-08-26 13:24:10,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:10,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925185678] [2023-08-26 13:24:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:10,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:24:10,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:10,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925185678] [2023-08-26 13:24:10,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925185678] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:10,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:10,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:24:10,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730021118] [2023-08-26 13:24:10,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:10,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:24:10,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:10,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:24:10,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:24:10,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 192 [2023-08-26 13:24:10,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 47 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 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 13:24:10,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:10,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 192 [2023-08-26 13:24:10,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:10,244 INFO L124 PetriNetUnfolderBase]: 69/152 cut-off events. [2023-08-26 13:24:10,244 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:24:10,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 152 events. 69/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 536 event pairs, 69 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 295. Up to 136 conditions per place. [2023-08-26 13:24:10,245 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 15 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-26 13:24:10,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 19 transitions, 77 flow [2023-08-26 13:24:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:10,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:10,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2023-08-26 13:24:10,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-08-26 13:24:10,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2023-08-26 13:24:10,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2023-08-26 13:24:10,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:10,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2023-08-26 13:24:10,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,249 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 47 flow. Second operand 3 states and 224 transitions. [2023-08-26 13:24:10,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 19 transitions, 77 flow [2023-08-26 13:24:10,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:10,250 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 46 flow [2023-08-26 13:24:10,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2023-08-26 13:24:10,251 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -6 predicate places. [2023-08-26 13:24:10,251 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 46 flow [2023-08-26 13:24:10,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 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 13:24:10,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:10,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:24:10,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:24:10,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:24:10,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:10,252 INFO L85 PathProgramCache]: Analyzing trace with hash 380898565, now seen corresponding path program 1 times [2023-08-26 13:24:10,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:10,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359775280] [2023-08-26 13:24:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:10,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:24:10,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:10,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359775280] [2023-08-26 13:24:10,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359775280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:10,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:10,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:24:10,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702737578] [2023-08-26 13:24:10,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:10,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:24:10,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:10,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:24:10,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:24:10,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 192 [2023-08-26 13:24:10,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 19 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:10,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 192 [2023-08-26 13:24:10,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:10,387 INFO L124 PetriNetUnfolderBase]: 45/108 cut-off events. [2023-08-26 13:24:10,387 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:24:10,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 108 events. 45/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 333 event pairs, 45 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 212. Up to 96 conditions per place. [2023-08-26 13:24:10,391 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 14 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-08-26 13:24:10,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 74 flow [2023-08-26 13:24:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:24:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:24:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-08-26 13:24:10,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923611111111111 [2023-08-26 13:24:10,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-08-26 13:24:10,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-08-26 13:24:10,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:10,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-08-26 13:24:10,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,394 INFO L175 Difference]: Start difference. First operand has 27 places, 19 transitions, 46 flow. Second operand 3 states and 226 transitions. [2023-08-26 13:24:10,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 74 flow [2023-08-26 13:24:10,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 18 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:10,395 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 45 flow [2023-08-26 13:24:10,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=45, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2023-08-26 13:24:10,396 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -6 predicate places. [2023-08-26 13:24:10,396 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 45 flow [2023-08-26 13:24:10,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:10,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:10,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:24:10,397 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:24:10,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:10,397 INFO L85 PathProgramCache]: Analyzing trace with hash 107753045, now seen corresponding path program 1 times [2023-08-26 13:24:10,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:10,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749283516] [2023-08-26 13:24:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:10,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:24:10,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:10,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749283516] [2023-08-26 13:24:10,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749283516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:10,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:10,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:24:10,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375560135] [2023-08-26 13:24:10,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:10,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:24:10,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:10,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:24:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:24:10,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2023-08-26 13:24:10,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 45 flow. Second operand has 4 states, 4 states have (on average 86.5) internal successors, (346), 4 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:10,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2023-08-26 13:24:10,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:10,646 INFO L124 PetriNetUnfolderBase]: 97/199 cut-off events. [2023-08-26 13:24:10,646 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:24:10,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 199 events. 97/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 637 event pairs, 78 based on Foata normal form. 1/200 useless extension candidates. Maximal degree in co-relation 409. Up to 144 conditions per place. [2023-08-26 13:24:10,647 INFO L140 encePairwiseOnDemand]: 187/192 looper letters, 21 selfloop transitions, 3 changer transitions 8/32 dead transitions. [2023-08-26 13:24:10,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 140 flow [2023-08-26 13:24:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 13:24:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 13:24:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 361 transitions. [2023-08-26 13:24:10,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700520833333333 [2023-08-26 13:24:10,648 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 361 transitions. [2023-08-26 13:24:10,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 361 transitions. [2023-08-26 13:24:10,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:10,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 361 transitions. [2023-08-26 13:24:10,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.25) internal successors, (361), 4 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,651 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,651 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 45 flow. Second operand 4 states and 361 transitions. [2023-08-26 13:24:10,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 140 flow [2023-08-26 13:24:10,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:24:10,652 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 58 flow [2023-08-26 13:24:10,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2023-08-26 13:24:10,654 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -2 predicate places. [2023-08-26 13:24:10,654 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 58 flow [2023-08-26 13:24:10,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.5) internal successors, (346), 4 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:10,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:10,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:24:10,655 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:24:10,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2050813211, now seen corresponding path program 2 times [2023-08-26 13:24:10,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:10,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673396809] [2023-08-26 13:24:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:10,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:24:10,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:10,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673396809] [2023-08-26 13:24:10,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673396809] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:10,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:10,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:24:10,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870441589] [2023-08-26 13:24:10,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:10,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:24:10,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:10,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:24:10,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:24:10,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2023-08-26 13:24:10,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 58 flow. Second operand has 6 states, 6 states have (on average 84.5) internal successors, (507), 6 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:10,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2023-08-26 13:24:10,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:10,823 INFO L124 PetriNetUnfolderBase]: 27/80 cut-off events. [2023-08-26 13:24:10,824 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 13:24:10,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 80 events. 27/80 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 191 event pairs, 4 based on Foata normal form. 4/84 useless extension candidates. Maximal degree in co-relation 180. Up to 22 conditions per place. [2023-08-26 13:24:10,824 INFO L140 encePairwiseOnDemand]: 186/192 looper letters, 15 selfloop transitions, 4 changer transitions 8/30 dead transitions. [2023-08-26 13:24:10,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 137 flow [2023-08-26 13:24:10,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:24:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:24:10,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 520 transitions. [2023-08-26 13:24:10,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2023-08-26 13:24:10,826 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 520 transitions. [2023-08-26 13:24:10,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 520 transitions. [2023-08-26 13:24:10,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:10,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 520 transitions. [2023-08-26 13:24:10,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.66666666666667) internal successors, (520), 6 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 192.0) internal successors, (1344), 7 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,829 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 192.0) internal successors, (1344), 7 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,829 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 58 flow. Second operand 6 states and 520 transitions. [2023-08-26 13:24:10,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 137 flow [2023-08-26 13:24:10,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 129 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 13:24:10,833 INFO L231 Difference]: Finished difference. Result has 36 places, 20 transitions, 75 flow [2023-08-26 13:24:10,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=20} [2023-08-26 13:24:10,834 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-26 13:24:10,834 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 20 transitions, 75 flow [2023-08-26 13:24:10,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.5) internal successors, (507), 6 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:10,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:10,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:24:10,835 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:24:10,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash -344612393, now seen corresponding path program 3 times [2023-08-26 13:24:10,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:10,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888962158] [2023-08-26 13:24:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:10,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:24:10,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:10,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888962158] [2023-08-26 13:24:10,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888962158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:24:10,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:24:10,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:24:10,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718778058] [2023-08-26 13:24:10,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:24:10,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:24:10,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:10,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:24:10,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:24:10,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 192 [2023-08-26 13:24:10,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 20 transitions, 75 flow. Second operand has 6 states, 6 states have (on average 84.5) internal successors, (507), 6 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:10,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 192 [2023-08-26 13:24:10,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:10,981 INFO L124 PetriNetUnfolderBase]: 6/19 cut-off events. [2023-08-26 13:24:10,981 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 13:24:10,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 19 events. 6/19 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 4/23 useless extension candidates. Maximal degree in co-relation 57. Up to 8 conditions per place. [2023-08-26 13:24:10,981 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-26 13:24:10,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 11 transitions, 63 flow [2023-08-26 13:24:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:24:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:24:10,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 422 transitions. [2023-08-26 13:24:10,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395833333333333 [2023-08-26 13:24:10,983 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 422 transitions. [2023-08-26 13:24:10,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 422 transitions. [2023-08-26 13:24:10,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:10,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 422 transitions. [2023-08-26 13:24:10,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,985 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,985 INFO L175 Difference]: Start difference. First operand has 36 places, 20 transitions, 75 flow. Second operand 5 states and 422 transitions. [2023-08-26 13:24:10,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 11 transitions, 63 flow [2023-08-26 13:24:10,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 11 transitions, 55 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-26 13:24:10,985 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-26 13:24:10,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-26 13:24:10,987 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -10 predicate places. [2023-08-26 13:24:10,987 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-26 13:24:10,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.5) internal successors, (507), 6 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:10,990 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2023-08-26 13:24:10,990 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 13:24:10,990 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 13:24:10,990 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 13:24:10,990 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 13:24:10,990 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 13:24:10,991 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 13:24:10,991 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 13:24:10,991 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 13:24:10,991 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 13:24:10,991 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 13:24:10,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:24:10,991 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-08-26 13:24:10,993 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 13:24:10,993 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 13:24:10,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:24:10 BasicIcfg [2023-08-26 13:24:10,998 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 13:24:10,999 INFO L158 Benchmark]: Toolchain (without parser) took 4644.72ms. Allocated memory was 371.2MB in the beginning and 501.2MB in the end (delta: 130.0MB). Free memory was 348.4MB in the beginning and 342.6MB in the end (delta: 5.8MB). Peak memory consumption was 137.5MB. Max. memory is 16.0GB. [2023-08-26 13:24:10,999 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 371.2MB. Free memory is still 347.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:24:10,999 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.36ms. Allocated memory is still 371.2MB. Free memory was 347.9MB in the beginning and 337.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 13:24:10,999 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.18ms. Allocated memory is still 371.2MB. Free memory was 337.4MB in the beginning and 335.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:24:10,999 INFO L158 Benchmark]: Boogie Preprocessor took 13.61ms. Allocated memory is still 371.2MB. Free memory was 335.3MB in the beginning and 334.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:24:10,999 INFO L158 Benchmark]: RCFGBuilder took 373.85ms. Allocated memory is still 371.2MB. Free memory was 334.3MB in the beginning and 315.9MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 13:24:11,000 INFO L158 Benchmark]: TraceAbstraction took 3991.92ms. Allocated memory was 371.2MB in the beginning and 501.2MB in the end (delta: 130.0MB). Free memory was 315.4MB in the beginning and 342.6MB in the end (delta: -27.2MB). Peak memory consumption was 106.0MB. Max. memory is 16.0GB. [2023-08-26 13:24:11,003 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 371.2MB. Free memory is still 347.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 225.36ms. Allocated memory is still 371.2MB. Free memory was 347.9MB in the beginning and 337.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 35.18ms. Allocated memory is still 371.2MB. Free memory was 337.4MB in the beginning and 335.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 13.61ms. Allocated memory is still 371.2MB. Free memory was 335.3MB in the beginning and 334.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 373.85ms. Allocated memory is still 371.2MB. Free memory was 334.3MB in the beginning and 315.9MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 3991.92ms. Allocated memory was 371.2MB in the beginning and 501.2MB in the end (delta: 130.0MB). Free memory was 315.4MB in the beginning and 342.6MB in the end (delta: -27.2MB). Peak memory consumption was 106.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 98 PlacesBefore, 33 PlacesAfterwards, 93 TransitionsBefore, 26 TransitionsAfterwards, 386 CoEnabledTransitionPairs, 7 FixpointIterations, 63 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 88 TotalNumberOfCompositions, 2001 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1278, independent: 1152, independent conditional: 0, independent unconditional: 1152, dependent: 126, dependent conditional: 0, dependent unconditional: 126, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 225, independent: 216, independent conditional: 0, independent unconditional: 216, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1278, independent: 936, independent conditional: 0, independent unconditional: 936, dependent: 117, dependent conditional: 0, dependent unconditional: 117, unknown: 225, unknown conditional: 0, unknown unconditional: 225] , Statistics on independence cache: Total cache size (in pairs): 62, Positive cache size: 57, Positive conditional cache size: 0, Positive unconditional cache size: 57, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 120 locations, 11 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.9s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 84 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 84 mSDsluCounter, 3 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 249 IncrementalHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 2 mSDtfsCounter, 249 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=7, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 71 NumberOfCodeBlocks, 71 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 343 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 13:24:11,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...