/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-bakery-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:11:10,226 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:11:10,313 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 13:11:10,319 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:11:10,320 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:11:10,348 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:11:10,349 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:11:10,349 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:11:10,350 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:11:10,353 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:11:10,354 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:11:10,354 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:11:10,354 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:11:10,355 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:11:10,355 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:11:10,356 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:11:10,356 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:11:10,356 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:11:10,356 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:11:10,356 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:11:10,357 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:11:10,358 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:11:10,358 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:11:10,358 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:11:10,358 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:11:10,359 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:11:10,359 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:11:10,359 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:11:10,359 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:11:10,360 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:11:10,360 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:11:10,361 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:11:10,361 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:11:10,361 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:11:10,361 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:11:10,361 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:11:10,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:11:10,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:11:10,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:11:10,645 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:11:10,645 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:11:10,646 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-bakery-2.wvr.c [2023-08-26 13:11:11,821 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:11:12,075 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:11:12,075 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-2.wvr.c [2023-08-26 13:11:12,084 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0a877b4/6752da2551144933883757a3128d0ecc/FLAG109f11ff5 [2023-08-26 13:11:12,099 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0a877b4/6752da2551144933883757a3128d0ecc [2023-08-26 13:11:12,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:11:12,105 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:11:12,107 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:11:12,107 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:11:12,110 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:11:12,111 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:11:12" (1/1) ... [2023-08-26 13:11:12,111 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@de43f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:12, skipping insertion in model container [2023-08-26 13:11:12,112 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:11:12" (1/1) ... [2023-08-26 13:11:12,137 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:11:12,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:11:12,320 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:11:12,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:11:12,360 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:11:12,360 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:11:12,371 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:11:12,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:12 WrapperNode [2023-08-26 13:11:12,372 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:11:12,373 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:11:12,373 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:11:12,373 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:11:12,379 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:12" (1/1) ... [2023-08-26 13:11:12,393 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:12" (1/1) ... [2023-08-26 13:11:12,425 INFO L138 Inliner]: procedures = 21, calls = 61, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 157 [2023-08-26 13:11:12,425 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:11:12,427 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:11:12,427 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:11:12,427 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:11:12,437 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:12" (1/1) ... [2023-08-26 13:11:12,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:12" (1/1) ... [2023-08-26 13:11:12,453 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:12" (1/1) ... [2023-08-26 13:11:12,453 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:12" (1/1) ... [2023-08-26 13:11:12,457 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:12" (1/1) ... [2023-08-26 13:11:12,458 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:12" (1/1) ... [2023-08-26 13:11:12,460 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:12" (1/1) ... [2023-08-26 13:11:12,461 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:12" (1/1) ... [2023-08-26 13:11:12,462 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:11:12,463 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:11:12,463 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:11:12,463 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:11:12,473 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:12" (1/1) ... [2023-08-26 13:11:12,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:11:12,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:12,498 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 13:11:12,520 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 13:11:12,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:11:12,534 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:11:12,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:11:12,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:11:12,535 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:11:12,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:11:12,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:11:12,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:11:12,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 13:11:12,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 13:11:12,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:11:12,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:11:12,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:11:12,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:11:12,538 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 13:11:12,617 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:11:12,618 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:11:12,848 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:11:12,900 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:11:12,900 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 13:11:12,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:11:12 BoogieIcfgContainer [2023-08-26 13:11:12,903 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:11:12,905 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:11:12,905 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:11:12,907 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:11:12,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:11:12" (1/3) ... [2023-08-26 13:11:12,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a61f6fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:11:12, skipping insertion in model container [2023-08-26 13:11:12,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:11:12" (2/3) ... [2023-08-26 13:11:12,913 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a61f6fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:11:12, skipping insertion in model container [2023-08-26 13:11:12,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:11:12" (3/3) ... [2023-08-26 13:11:12,914 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-bakery-2.wvr.c [2023-08-26 13:11:12,929 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:11:12,929 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 13:11:12,929 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:11:13,001 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 13:11:13,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 117 transitions, 250 flow [2023-08-26 13:11:13,102 INFO L124 PetriNetUnfolderBase]: 2/115 cut-off events. [2023-08-26 13:11:13,103 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:11:13,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 115 events. 2/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-08-26 13:11:13,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 117 transitions, 250 flow [2023-08-26 13:11:13,109 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 106 transitions, 224 flow [2023-08-26 13:11:13,112 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:11:13,127 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 106 transitions, 224 flow [2023-08-26 13:11:13,131 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 106 transitions, 224 flow [2023-08-26 13:11:13,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 106 transitions, 224 flow [2023-08-26 13:11:13,159 INFO L124 PetriNetUnfolderBase]: 2/106 cut-off events. [2023-08-26 13:11:13,160 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:11:13,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 106 events. 2/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-08-26 13:11:13,161 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-08-26 13:11:16,473 INFO L134 LiptonReduction]: Checked pairs total: 5259 [2023-08-26 13:11:16,473 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-26 13:11:16,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:11:16,490 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;@636dc11c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:11:16,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 13:11:16,491 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:11:16,491 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 13:11:16,491 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:11:16,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:16,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:11:16,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:16,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:16,496 INFO L85 PathProgramCache]: Analyzing trace with hash 465, now seen corresponding path program 1 times [2023-08-26 13:11:16,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:16,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9034006] [2023-08-26 13:11:16,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:16,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:16,564 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 13:11:16,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:16,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9034006] [2023-08-26 13:11:16,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9034006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:16,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:16,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:11:16,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433044930] [2023-08-26 13:11:16,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:16,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:11:16,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:16,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:11:16,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:11:16,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 211 [2023-08-26 13:11:16,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 104.5) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:16,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:16,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 211 [2023-08-26 13:11:16,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:16,677 INFO L124 PetriNetUnfolderBase]: 168/395 cut-off events. [2023-08-26 13:11:16,677 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 13:11:16,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 395 events. 168/395 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2096 event pairs, 168 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 636. Up to 312 conditions per place. [2023-08-26 13:11:16,682 INFO L140 encePairwiseOnDemand]: 209/211 looper letters, 23 selfloop transitions, 0 changer transitions 0/33 dead transitions. [2023-08-26 13:11:16,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 124 flow [2023-08-26 13:11:16,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:11:16,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:11:16,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 233 transitions. [2023-08-26 13:11:16,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521327014218009 [2023-08-26 13:11:16,693 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 233 transitions. [2023-08-26 13:11:16,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 233 transitions. [2023-08-26 13:11:16,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:16,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 233 transitions. [2023-08-26 13:11:16,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 116.5) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:16,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:16,703 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:16,704 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 82 flow. Second operand 2 states and 233 transitions. [2023-08-26 13:11:16,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 124 flow [2023-08-26 13:11:16,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 13:11:16,708 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 70 flow [2023-08-26 13:11:16,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-08-26 13:11:16,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-08-26 13:11:16,712 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 70 flow [2023-08-26 13:11:16,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 104.5) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:16,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:16,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:11:16,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:11:16,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:16,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:16,714 INFO L85 PathProgramCache]: Analyzing trace with hash 455833, now seen corresponding path program 1 times [2023-08-26 13:11:16,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:16,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689289094] [2023-08-26 13:11:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:16,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:16,907 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 13:11:16,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:16,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689289094] [2023-08-26 13:11:16,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689289094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:16,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:16,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:11:16,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491789421] [2023-08-26 13:11:16,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:16,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:11:16,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:16,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:11:16,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:11:16,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 211 [2023-08-26 13:11:16,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:16,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:16,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 211 [2023-08-26 13:11:16,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:16,991 INFO L124 PetriNetUnfolderBase]: 160/375 cut-off events. [2023-08-26 13:11:16,992 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:11:16,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 375 events. 160/375 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1960 event pairs, 160 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 674. Up to 293 conditions per place. [2023-08-26 13:11:16,996 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 20 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-26 13:11:16,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 108 flow [2023-08-26 13:11:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2023-08-26 13:11:17,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4486571879936809 [2023-08-26 13:11:17,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2023-08-26 13:11:17,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2023-08-26 13:11:17,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:17,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2023-08-26 13:11:17,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,008 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 70 flow. Second operand 3 states and 284 transitions. [2023-08-26 13:11:17,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 108 flow [2023-08-26 13:11:17,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 108 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:11:17,010 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 68 flow [2023-08-26 13:11:17,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-08-26 13:11:17,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-08-26 13:11:17,012 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 68 flow [2023-08-26 13:11:17,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:17,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:11:17,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:11:17,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:17,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash 455834, now seen corresponding path program 1 times [2023-08-26 13:11:17,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:17,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989909177] [2023-08-26 13:11:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:17,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:17,105 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 13:11:17,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:17,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989909177] [2023-08-26 13:11:17,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989909177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:17,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:17,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:11:17,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324622757] [2023-08-26 13:11:17,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:17,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:11:17,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:17,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:11:17,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:11:17,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 211 [2023-08-26 13:11:17,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:17,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 211 [2023-08-26 13:11:17,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:17,160 INFO L124 PetriNetUnfolderBase]: 152/355 cut-off events. [2023-08-26 13:11:17,161 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:11:17,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641 conditions, 355 events. 152/355 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1809 event pairs, 152 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 637. Up to 275 conditions per place. [2023-08-26 13:11:17,163 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 18 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-26 13:11:17,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 102 flow [2023-08-26 13:11:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:17,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2023-08-26 13:11:17,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43601895734597157 [2023-08-26 13:11:17,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2023-08-26 13:11:17,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2023-08-26 13:11:17,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:17,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2023-08-26 13:11:17,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,168 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,168 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 68 flow. Second operand 3 states and 276 transitions. [2023-08-26 13:11:17,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 102 flow [2023-08-26 13:11:17,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:11:17,169 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 65 flow [2023-08-26 13:11:17,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-26 13:11:17,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-08-26 13:11:17,171 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 65 flow [2023-08-26 13:11:17,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:17,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:11:17,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:11:17,174 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 13:11:17,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:17,175 INFO L85 PathProgramCache]: Analyzing trace with hash 438068243, now seen corresponding path program 1 times [2023-08-26 13:11:17,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:17,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600008775] [2023-08-26 13:11:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:17,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:17,315 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 13:11:17,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:17,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600008775] [2023-08-26 13:11:17,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600008775] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:17,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:17,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:11:17,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126325177] [2023-08-26 13:11:17,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:17,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:11:17,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:17,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:11:17,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:11:17,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 211 [2023-08-26 13:11:17,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:17,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 211 [2023-08-26 13:11:17,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:17,364 INFO L124 PetriNetUnfolderBase]: 112/274 cut-off events. [2023-08-26 13:11:17,364 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:11:17,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 274 events. 112/274 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1301 event pairs, 112 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 492. Up to 210 conditions per place. [2023-08-26 13:11:17,365 INFO L140 encePairwiseOnDemand]: 209/211 looper letters, 17 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-26 13:11:17,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 28 transitions, 99 flow [2023-08-26 13:11:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-08-26 13:11:17,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186413902053712 [2023-08-26 13:11:17,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-08-26 13:11:17,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-08-26 13:11:17,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:17,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-08-26 13:11:17,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,370 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,370 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 65 flow. Second operand 3 states and 265 transitions. [2023-08-26 13:11:17,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 28 transitions, 99 flow [2023-08-26 13:11:17,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:11:17,371 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 64 flow [2023-08-26 13:11:17,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-08-26 13:11:17,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-08-26 13:11:17,373 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 64 flow [2023-08-26 13:11:17,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:17,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:11:17,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:11:17,373 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 13:11:17,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:17,374 INFO L85 PathProgramCache]: Analyzing trace with hash 438068245, now seen corresponding path program 1 times [2023-08-26 13:11:17,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:17,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161118819] [2023-08-26 13:11:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:17,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:17,506 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 13:11:17,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:17,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161118819] [2023-08-26 13:11:17,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161118819] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:17,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:17,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:11:17,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962862348] [2023-08-26 13:11:17,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:17,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:11:17,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:17,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:11:17,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:11:17,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 211 [2023-08-26 13:11:17,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:17,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 211 [2023-08-26 13:11:17,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:17,552 INFO L124 PetriNetUnfolderBase]: 72/193 cut-off events. [2023-08-26 13:11:17,553 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:11:17,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 193 events. 72/193 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 824 event pairs, 72 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 347. Up to 145 conditions per place. [2023-08-26 13:11:17,555 INFO L140 encePairwiseOnDemand]: 209/211 looper letters, 16 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-26 13:11:17,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 27 transitions, 96 flow [2023-08-26 13:11:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-08-26 13:11:17,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4218009478672986 [2023-08-26 13:11:17,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-08-26 13:11:17,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-08-26 13:11:17,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:17,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-08-26 13:11:17,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,559 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 64 flow. Second operand 3 states and 267 transitions. [2023-08-26 13:11:17,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 27 transitions, 96 flow [2023-08-26 13:11:17,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:11:17,561 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 63 flow [2023-08-26 13:11:17,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-26 13:11:17,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-08-26 13:11:17,562 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 63 flow [2023-08-26 13:11:17,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:17,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:17,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:11:17,563 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 13:11:17,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:17,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1581998519, now seen corresponding path program 1 times [2023-08-26 13:11:17,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:17,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382609252] [2023-08-26 13:11:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:17,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:17,741 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 13:11:17,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:17,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382609252] [2023-08-26 13:11:17,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382609252] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:17,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:17,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:11:17,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205127551] [2023-08-26 13:11:17,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:17,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:11:17,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:17,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:11:17,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:11:17,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 211 [2023-08-26 13:11:17,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 63 flow. Second operand has 7 states, 7 states have (on average 95.0) internal successors, (665), 7 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:17,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 211 [2023-08-26 13:11:17,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:17,951 INFO L124 PetriNetUnfolderBase]: 172/364 cut-off events. [2023-08-26 13:11:17,952 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 13:11:17,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 364 events. 172/364 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1530 event pairs, 57 based on Foata normal form. 1/354 useless extension candidates. Maximal degree in co-relation 728. Up to 98 conditions per place. [2023-08-26 13:11:17,953 INFO L140 encePairwiseOnDemand]: 205/211 looper letters, 44 selfloop transitions, 7 changer transitions 17/74 dead transitions. [2023-08-26 13:11:17,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 74 transitions, 302 flow [2023-08-26 13:11:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 13:11:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 13:11:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 805 transitions. [2023-08-26 13:11:17,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4768957345971564 [2023-08-26 13:11:17,956 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 805 transitions. [2023-08-26 13:11:17,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 805 transitions. [2023-08-26 13:11:17,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:17,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 805 transitions. [2023-08-26 13:11:17,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 100.625) internal successors, (805), 8 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,961 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,961 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 63 flow. Second operand 8 states and 805 transitions. [2023-08-26 13:11:17,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 74 transitions, 302 flow [2023-08-26 13:11:17,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 74 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:11:17,963 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 100 flow [2023-08-26 13:11:17,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=100, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2023-08-26 13:11:17,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-26 13:11:17,964 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 100 flow [2023-08-26 13:11:17,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 95.0) internal successors, (665), 7 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:17,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:17,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:17,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:11:17,965 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 13:11:17,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:17,965 INFO L85 PathProgramCache]: Analyzing trace with hash -923943385, now seen corresponding path program 2 times [2023-08-26 13:11:17,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:17,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774622618] [2023-08-26 13:11:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:17,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:18,215 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 13:11:18,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774622618] [2023-08-26 13:11:18,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774622618] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:18,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:18,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 13:11:18,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265522626] [2023-08-26 13:11:18,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:18,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:11:18,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:18,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:11:18,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:11:18,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 211 [2023-08-26 13:11:18,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 100 flow. Second operand has 7 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:18,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 211 [2023-08-26 13:11:18,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:18,337 INFO L124 PetriNetUnfolderBase]: 142/398 cut-off events. [2023-08-26 13:11:18,337 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 13:11:18,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 398 events. 142/398 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1951 event pairs, 28 based on Foata normal form. 6/395 useless extension candidates. Maximal degree in co-relation 807. Up to 144 conditions per place. [2023-08-26 13:11:18,339 INFO L140 encePairwiseOnDemand]: 203/211 looper letters, 31 selfloop transitions, 7 changer transitions 13/64 dead transitions. [2023-08-26 13:11:18,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 64 transitions, 272 flow [2023-08-26 13:11:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:11:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:11:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 717 transitions. [2023-08-26 13:11:18,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4854434664861205 [2023-08-26 13:11:18,341 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 717 transitions. [2023-08-26 13:11:18,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 717 transitions. [2023-08-26 13:11:18,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:18,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 717 transitions. [2023-08-26 13:11:18,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 102.42857142857143) internal successors, (717), 7 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,346 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,346 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 100 flow. Second operand 7 states and 717 transitions. [2023-08-26 13:11:18,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 64 transitions, 272 flow [2023-08-26 13:11:18,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 268 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 13:11:18,348 INFO L231 Difference]: Finished difference. Result has 52 places, 36 transitions, 139 flow [2023-08-26 13:11:18,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=52, PETRI_TRANSITIONS=36} [2023-08-26 13:11:18,349 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2023-08-26 13:11:18,349 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 36 transitions, 139 flow [2023-08-26 13:11:18,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:18,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:18,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:11:18,350 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 13:11:18,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:18,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1933151089, now seen corresponding path program 3 times [2023-08-26 13:11:18,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:18,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38339208] [2023-08-26 13:11:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:18,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:18,422 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 13:11:18,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:18,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38339208] [2023-08-26 13:11:18,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38339208] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:18,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:18,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:11:18,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836223729] [2023-08-26 13:11:18,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:18,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:11:18,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:18,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:11:18,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:11:18,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 211 [2023-08-26 13:11:18,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 36 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:18,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 211 [2023-08-26 13:11:18,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:18,477 INFO L124 PetriNetUnfolderBase]: 123/356 cut-off events. [2023-08-26 13:11:18,477 INFO L125 PetriNetUnfolderBase]: For 185/202 co-relation queries the response was YES. [2023-08-26 13:11:18,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 356 events. 123/356 cut-off events. For 185/202 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1652 event pairs, 84 based on Foata normal form. 5/351 useless extension candidates. Maximal degree in co-relation 862. Up to 226 conditions per place. [2023-08-26 13:11:18,479 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 26 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-26 13:11:18,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 42 transitions, 215 flow [2023-08-26 13:11:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:18,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2023-08-26 13:11:18,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102685624012638 [2023-08-26 13:11:18,481 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2023-08-26 13:11:18,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2023-08-26 13:11:18,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:18,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2023-08-26 13:11:18,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,483 INFO L175 Difference]: Start difference. First operand has 52 places, 36 transitions, 139 flow. Second operand 3 states and 323 transitions. [2023-08-26 13:11:18,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 42 transitions, 215 flow [2023-08-26 13:11:18,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 207 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 13:11:18,486 INFO L231 Difference]: Finished difference. Result has 51 places, 36 transitions, 143 flow [2023-08-26 13:11:18,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2023-08-26 13:11:18,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2023-08-26 13:11:18,487 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 143 flow [2023-08-26 13:11:18,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:18,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:18,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:11:18,488 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:18,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:18,488 INFO L85 PathProgramCache]: Analyzing trace with hash -633553981, now seen corresponding path program 4 times [2023-08-26 13:11:18,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:18,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107649525] [2023-08-26 13:11:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:18,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:18,720 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 13:11:18,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:18,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107649525] [2023-08-26 13:11:18,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107649525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:18,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:18,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 13:11:18,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797784319] [2023-08-26 13:11:18,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:18,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:11:18,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:18,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:11:18,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:11:18,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 211 [2023-08-26 13:11:18,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 143 flow. Second operand has 7 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:18,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 211 [2023-08-26 13:11:18,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:18,864 INFO L124 PetriNetUnfolderBase]: 133/394 cut-off events. [2023-08-26 13:11:18,864 INFO L125 PetriNetUnfolderBase]: For 186/202 co-relation queries the response was YES. [2023-08-26 13:11:18,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 394 events. 133/394 cut-off events. For 186/202 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1967 event pairs, 24 based on Foata normal form. 8/399 useless extension candidates. Maximal degree in co-relation 966. Up to 128 conditions per place. [2023-08-26 13:11:18,866 INFO L140 encePairwiseOnDemand]: 202/211 looper letters, 34 selfloop transitions, 13 changer transitions 8/68 dead transitions. [2023-08-26 13:11:18,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 350 flow [2023-08-26 13:11:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:11:18,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:11:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 718 transitions. [2023-08-26 13:11:18,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861205145565335 [2023-08-26 13:11:18,869 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 718 transitions. [2023-08-26 13:11:18,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 718 transitions. [2023-08-26 13:11:18,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:18,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 718 transitions. [2023-08-26 13:11:18,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 102.57142857142857) internal successors, (718), 7 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,874 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,874 INFO L175 Difference]: Start difference. First operand has 51 places, 36 transitions, 143 flow. Second operand 7 states and 718 transitions. [2023-08-26 13:11:18,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 350 flow [2023-08-26 13:11:18,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 68 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 13:11:18,878 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 222 flow [2023-08-26 13:11:18,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=222, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2023-08-26 13:11:18,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2023-08-26 13:11:18,879 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 222 flow [2023-08-26 13:11:18,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:18,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:18,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 13:11:18,880 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:18,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:18,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1996531271, now seen corresponding path program 5 times [2023-08-26 13:11:18,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:18,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858733526] [2023-08-26 13:11:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:18,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:18,993 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 13:11:18,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:18,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858733526] [2023-08-26 13:11:18,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858733526] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:18,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:18,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:11:18,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901822877] [2023-08-26 13:11:18,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:18,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:11:18,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:18,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:11:18,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:11:18,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 211 [2023-08-26 13:11:18,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:18,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 211 [2023-08-26 13:11:18,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:19,056 INFO L124 PetriNetUnfolderBase]: 122/368 cut-off events. [2023-08-26 13:11:19,057 INFO L125 PetriNetUnfolderBase]: For 542/572 co-relation queries the response was YES. [2023-08-26 13:11:19,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 368 events. 122/368 cut-off events. For 542/572 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1794 event pairs, 90 based on Foata normal form. 8/372 useless extension candidates. Maximal degree in co-relation 1042. Up to 248 conditions per place. [2023-08-26 13:11:19,059 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 29 selfloop transitions, 2 changer transitions 5/51 dead transitions. [2023-08-26 13:11:19,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 332 flow [2023-08-26 13:11:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:11:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:11:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2023-08-26 13:11:19,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102685624012638 [2023-08-26 13:11:19,060 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2023-08-26 13:11:19,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2023-08-26 13:11:19,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:19,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2023-08-26 13:11:19,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,063 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 222 flow. Second operand 3 states and 323 transitions. [2023-08-26 13:11:19,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 332 flow [2023-08-26 13:11:19,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 326 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-26 13:11:19,066 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 226 flow [2023-08-26 13:11:19,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2023-08-26 13:11:19,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2023-08-26 13:11:19,067 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 226 flow [2023-08-26 13:11:19,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:19,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:19,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 13:11:19,067 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:19,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:19,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1053907907, now seen corresponding path program 6 times [2023-08-26 13:11:19,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:19,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816056996] [2023-08-26 13:11:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:19,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:19,255 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 13:11:19,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:19,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816056996] [2023-08-26 13:11:19,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816056996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:19,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:19,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:11:19,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371306872] [2023-08-26 13:11:19,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:19,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:11:19,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:19,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:11:19,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:11:19,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 211 [2023-08-26 13:11:19,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 98.8) internal successors, (494), 5 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:19,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 211 [2023-08-26 13:11:19,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:19,345 INFO L124 PetriNetUnfolderBase]: 122/386 cut-off events. [2023-08-26 13:11:19,345 INFO L125 PetriNetUnfolderBase]: For 546/569 co-relation queries the response was YES. [2023-08-26 13:11:19,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1138 conditions, 386 events. 122/386 cut-off events. For 546/569 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1904 event pairs, 44 based on Foata normal form. 7/387 useless extension candidates. Maximal degree in co-relation 1121. Up to 219 conditions per place. [2023-08-26 13:11:19,347 INFO L140 encePairwiseOnDemand]: 206/211 looper letters, 28 selfloop transitions, 3 changer transitions 16/60 dead transitions. [2023-08-26 13:11:19,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 386 flow [2023-08-26 13:11:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:11:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:11:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 512 transitions. [2023-08-26 13:11:19,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48530805687203793 [2023-08-26 13:11:19,349 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 512 transitions. [2023-08-26 13:11:19,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 512 transitions. [2023-08-26 13:11:19,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:19,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 512 transitions. [2023-08-26 13:11:19,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 102.4) internal successors, (512), 5 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,353 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,353 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 226 flow. Second operand 5 states and 512 transitions. [2023-08-26 13:11:19,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 386 flow [2023-08-26 13:11:19,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 13:11:19,357 INFO L231 Difference]: Finished difference. Result has 67 places, 43 transitions, 241 flow [2023-08-26 13:11:19,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=67, PETRI_TRANSITIONS=43} [2023-08-26 13:11:19,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2023-08-26 13:11:19,358 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 43 transitions, 241 flow [2023-08-26 13:11:19,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.8) internal successors, (494), 5 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:19,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:19,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 13:11:19,358 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:19,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:19,359 INFO L85 PathProgramCache]: Analyzing trace with hash 907794883, now seen corresponding path program 7 times [2023-08-26 13:11:19,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:19,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128175836] [2023-08-26 13:11:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:19,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:19,527 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 13:11:19,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:19,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128175836] [2023-08-26 13:11:19,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128175836] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:19,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:19,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:11:19,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474395993] [2023-08-26 13:11:19,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:19,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:11:19,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:19,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:11:19,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:11:19,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 211 [2023-08-26 13:11:19,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 43 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 98.8) internal successors, (494), 5 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:19,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 211 [2023-08-26 13:11:19,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:19,593 INFO L124 PetriNetUnfolderBase]: 63/189 cut-off events. [2023-08-26 13:11:19,594 INFO L125 PetriNetUnfolderBase]: For 265/269 co-relation queries the response was YES. [2023-08-26 13:11:19,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 189 events. 63/189 cut-off events. For 265/269 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 681 event pairs, 17 based on Foata normal form. 10/197 useless extension candidates. Maximal degree in co-relation 582. Up to 82 conditions per place. [2023-08-26 13:11:19,595 INFO L140 encePairwiseOnDemand]: 204/211 looper letters, 23 selfloop transitions, 7 changer transitions 9/47 dead transitions. [2023-08-26 13:11:19,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 47 transitions, 321 flow [2023-08-26 13:11:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:11:19,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:11:19,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 510 transitions. [2023-08-26 13:11:19,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834123222748815 [2023-08-26 13:11:19,597 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 510 transitions. [2023-08-26 13:11:19,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 510 transitions. [2023-08-26 13:11:19,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:19,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 510 transitions. [2023-08-26 13:11:19,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,600 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,600 INFO L175 Difference]: Start difference. First operand has 67 places, 43 transitions, 241 flow. Second operand 5 states and 510 transitions. [2023-08-26 13:11:19,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 47 transitions, 321 flow [2023-08-26 13:11:19,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 47 transitions, 298 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-26 13:11:19,602 INFO L231 Difference]: Finished difference. Result has 65 places, 33 transitions, 186 flow [2023-08-26 13:11:19,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=65, PETRI_TRANSITIONS=33} [2023-08-26 13:11:19,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2023-08-26 13:11:19,603 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 33 transitions, 186 flow [2023-08-26 13:11:19,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.8) internal successors, (494), 5 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:19,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:19,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 13:11:19,604 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:19,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1193440129, now seen corresponding path program 8 times [2023-08-26 13:11:19,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:19,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640234984] [2023-08-26 13:11:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:19,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:19,733 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 13:11:19,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:19,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640234984] [2023-08-26 13:11:19,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640234984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:11:19,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:11:19,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:11:19,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299786185] [2023-08-26 13:11:19,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:11:19,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:11:19,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:19,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:11:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:11:19,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 211 [2023-08-26 13:11:19,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 33 transitions, 186 flow. Second operand has 7 states, 7 states have (on average 95.0) internal successors, (665), 7 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:19,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 211 [2023-08-26 13:11:19,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:19,845 INFO L124 PetriNetUnfolderBase]: 54/138 cut-off events. [2023-08-26 13:11:19,846 INFO L125 PetriNetUnfolderBase]: For 182/184 co-relation queries the response was YES. [2023-08-26 13:11:19,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 138 events. 54/138 cut-off events. For 182/184 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 437 event pairs, 19 based on Foata normal form. 3/133 useless extension candidates. Maximal degree in co-relation 475. Up to 45 conditions per place. [2023-08-26 13:11:19,846 INFO L140 encePairwiseOnDemand]: 205/211 looper letters, 0 selfloop transitions, 0 changer transitions 40/40 dead transitions. [2023-08-26 13:11:19,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 40 transitions, 284 flow [2023-08-26 13:11:19,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:11:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:11:19,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 673 transitions. [2023-08-26 13:11:19,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45565335138794855 [2023-08-26 13:11:19,849 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 673 transitions. [2023-08-26 13:11:19,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 673 transitions. [2023-08-26 13:11:19,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:19,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 673 transitions. [2023-08-26 13:11:19,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.14285714285714) internal successors, (673), 7 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,853 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,853 INFO L175 Difference]: Start difference. First operand has 65 places, 33 transitions, 186 flow. Second operand 7 states and 673 transitions. [2023-08-26 13:11:19,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 40 transitions, 284 flow [2023-08-26 13:11:19,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 40 transitions, 220 flow, removed 8 selfloop flow, removed 15 redundant places. [2023-08-26 13:11:19,855 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2023-08-26 13:11:19,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2023-08-26 13:11:19,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2023-08-26 13:11:19,856 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2023-08-26 13:11:19,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 95.0) internal successors, (665), 7 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,858 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2023-08-26 13:11:19,858 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 13:11:19,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 13:11:19,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 13:11:19,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 13:11:19,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 13:11:19,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 13:11:19,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 13:11:19,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 13:11:19,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 13:11:19,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 13:11:19,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 13:11:19,860 INFO L445 BasicCegarLoop]: Path program histogram: [8, 1, 1, 1, 1, 1] [2023-08-26 13:11:19,862 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 13:11:19,862 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 13:11:19,864 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:11:19 BasicIcfg [2023-08-26 13:11:19,864 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 13:11:19,865 INFO L158 Benchmark]: Toolchain (without parser) took 7759.71ms. Allocated memory was 367.0MB in the beginning and 459.3MB in the end (delta: 92.3MB). Free memory was 343.4MB in the beginning and 428.1MB in the end (delta: -84.8MB). Peak memory consumption was 273.9MB. Max. memory is 16.0GB. [2023-08-26 13:11:19,865 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 367.0MB. Free memory is still 343.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:11:19,865 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.86ms. Allocated memory is still 367.0MB. Free memory was 342.9MB in the beginning and 331.6MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 13:11:19,865 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.96ms. Allocated memory is still 367.0MB. Free memory was 331.6MB in the beginning and 329.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:11:19,865 INFO L158 Benchmark]: Boogie Preprocessor took 36.03ms. Allocated memory is still 367.0MB. Free memory was 329.9MB in the beginning and 328.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:11:19,866 INFO L158 Benchmark]: RCFGBuilder took 439.67ms. Allocated memory is still 367.0MB. Free memory was 328.5MB in the beginning and 308.5MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 13:11:19,866 INFO L158 Benchmark]: TraceAbstraction took 6959.63ms. Allocated memory was 367.0MB in the beginning and 459.3MB in the end (delta: 92.3MB). Free memory was 308.0MB in the beginning and 428.1MB in the end (delta: -120.2MB). Peak memory consumption was 238.3MB. Max. memory is 16.0GB. [2023-08-26 13:11:19,867 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 367.0MB. Free memory is still 343.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 264.86ms. Allocated memory is still 367.0MB. Free memory was 342.9MB in the beginning and 331.6MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 52.96ms. Allocated memory is still 367.0MB. Free memory was 331.6MB in the beginning and 329.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 36.03ms. Allocated memory is still 367.0MB. Free memory was 329.9MB in the beginning and 328.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 439.67ms. Allocated memory is still 367.0MB. Free memory was 328.5MB in the beginning and 308.5MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 6959.63ms. Allocated memory was 367.0MB in the beginning and 459.3MB in the end (delta: 92.3MB). Free memory was 308.0MB in the beginning and 428.1MB in the end (delta: -120.2MB). Peak memory consumption was 238.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.3s, 111 PlacesBefore, 42 PlacesAfterwards, 106 TransitionsBefore, 35 TransitionsAfterwards, 748 CoEnabledTransitionPairs, 7 FixpointIterations, 67 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 94 TotalNumberOfCompositions, 5259 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2202, independent: 1934, independent conditional: 0, independent unconditional: 1934, dependent: 268, dependent conditional: 0, dependent unconditional: 268, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 334, independent: 316, independent conditional: 0, independent unconditional: 316, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2202, independent: 1618, independent conditional: 0, independent unconditional: 1618, dependent: 250, dependent conditional: 0, dependent unconditional: 250, unknown: 334, unknown conditional: 0, unknown unconditional: 334] , Statistics on independence cache: Total cache size (in pairs): 129, Positive cache size: 114, Positive conditional cache size: 0, Positive unconditional cache size: 114, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, 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, 142 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: 6.8s, OverallIterations: 13, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 219 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 219 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1043 IncrementalHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 7 mSDtfsCounter, 1043 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=241occurred in iteration=11, InterpolantAutomatonStates: 59, 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, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 233 NumberOfCodeBlocks, 233 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 220 ConstructedInterpolants, 0 QuantifiedInterpolants, 903 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 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 13:11:19,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...