/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 16:58:59,448 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 16:58:59,526 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 16:58:59,531 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 16:58:59,531 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 16:58:59,558 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 16:58:59,558 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 16:58:59,558 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 16:58:59,559 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 16:58:59,562 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 16:58:59,563 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 16:58:59,563 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 16:58:59,563 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 16:58:59,564 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 16:58:59,564 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 16:58:59,565 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 16:58:59,565 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 16:58:59,565 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 16:58:59,565 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 16:58:59,565 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 16:58:59,566 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 16:58:59,566 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 16:58:59,567 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 16:58:59,567 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 16:58:59,567 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 16:58:59,567 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 16:58:59,568 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 16:58:59,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:58:59,568 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 16:58:59,568 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 16:58:59,569 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 16:58:59,569 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 16:58:59,569 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 16:58:59,570 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 16:58:59,570 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 16:58:59,570 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 16:58:59,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 16:58:59,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 16:58:59,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 16:58:59,900 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 16:58:59,902 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 16:58:59,903 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-08-26 16:59:01,081 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 16:59:01,314 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 16:59:01,314 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-08-26 16:59:01,319 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b26163939/118aa613d01b4839883b6459c489bc77/FLAG040c3ff26 [2023-08-26 16:59:01,332 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b26163939/118aa613d01b4839883b6459c489bc77 [2023-08-26 16:59:01,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 16:59:01,336 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 16:59:01,337 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 16:59:01,337 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 16:59:01,345 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 16:59:01,345 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:59:01" (1/1) ... [2023-08-26 16:59:01,346 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f81b8e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:59:01, skipping insertion in model container [2023-08-26 16:59:01,346 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:59:01" (1/1) ... [2023-08-26 16:59:01,365 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 16:59:01,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:59:01,502 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 16:59:01,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:59:01,523 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 16:59:01,524 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 16:59:01,530 INFO L206 MainTranslator]: Completed translation [2023-08-26 16:59:01,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:59:01 WrapperNode [2023-08-26 16:59:01,530 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 16:59:01,531 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 16:59:01,531 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 16:59:01,532 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 16:59:01,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:59:01" (1/1) ... [2023-08-26 16:59:01,553 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:59:01" (1/1) ... [2023-08-26 16:59:01,576 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2023-08-26 16:59:01,577 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 16:59:01,578 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 16:59:01,578 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 16:59:01,578 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 16:59:01,585 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:59:01" (1/1) ... [2023-08-26 16:59:01,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:59:01" (1/1) ... [2023-08-26 16:59:01,589 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:59:01" (1/1) ... [2023-08-26 16:59:01,590 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:59:01" (1/1) ... [2023-08-26 16:59:01,604 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:59:01" (1/1) ... [2023-08-26 16:59:01,607 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:59:01" (1/1) ... [2023-08-26 16:59:01,608 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:59:01" (1/1) ... [2023-08-26 16:59:01,609 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:59:01" (1/1) ... [2023-08-26 16:59:01,610 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 16:59:01,611 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 16:59:01,611 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 16:59:01,611 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 16:59:01,612 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:59:01" (1/1) ... [2023-08-26 16:59:01,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:59:01,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:01,642 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 16:59:01,671 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 16:59:01,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 16:59:01,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 16:59:01,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 16:59:01,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 16:59:01,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 16:59:01,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 16:59:01,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 16:59:01,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 16:59:01,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 16:59:01,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 16:59:01,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 16:59:01,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 16:59:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 16:59:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 16:59:01,691 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 16:59:01,795 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 16:59:01,797 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 16:59:01,995 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 16:59:02,023 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 16:59:02,023 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 16:59:02,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:59:02 BoogieIcfgContainer [2023-08-26 16:59:02,025 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 16:59:02,027 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 16:59:02,027 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 16:59:02,030 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 16:59:02,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:59:01" (1/3) ... [2023-08-26 16:59:02,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e7b760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:59:02, skipping insertion in model container [2023-08-26 16:59:02,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:59:01" (2/3) ... [2023-08-26 16:59:02,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e7b760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:59:02, skipping insertion in model container [2023-08-26 16:59:02,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:59:02" (3/3) ... [2023-08-26 16:59:02,032 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-08-26 16:59:02,046 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 16:59:02,046 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 16:59:02,047 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 16:59:02,106 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 16:59:02,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 84 transitions, 184 flow [2023-08-26 16:59:02,171 INFO L124 PetriNetUnfolderBase]: 5/82 cut-off events. [2023-08-26 16:59:02,171 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 16:59:02,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 5/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-08-26 16:59:02,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 84 transitions, 184 flow [2023-08-26 16:59:02,185 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 73 transitions, 158 flow [2023-08-26 16:59:02,187 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:59:02,199 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 73 transitions, 158 flow [2023-08-26 16:59:02,201 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 73 transitions, 158 flow [2023-08-26 16:59:02,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 158 flow [2023-08-26 16:59:02,220 INFO L124 PetriNetUnfolderBase]: 5/73 cut-off events. [2023-08-26 16:59:02,220 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 16:59:02,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 5/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-08-26 16:59:02,224 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-08-26 16:59:04,395 INFO L134 LiptonReduction]: Checked pairs total: 781 [2023-08-26 16:59:04,395 INFO L136 LiptonReduction]: Total number of compositions: 73 [2023-08-26 16:59:04,408 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 16:59:04,414 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;@35f4740c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:59:04,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 16:59:04,415 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:59:04,415 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 16:59:04,415 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:59:04,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:04,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 16:59:04,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:04,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash 343, now seen corresponding path program 1 times [2023-08-26 16:59:04,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:04,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475672432] [2023-08-26 16:59:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:04,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:04,501 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 16:59:04,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:04,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475672432] [2023-08-26 16:59:04,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475672432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:04,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:04,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 16:59:04,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663094941] [2023-08-26 16:59:04,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:04,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 16:59:04,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:04,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 16:59:04,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 16:59:04,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 157 [2023-08-26 16:59:04,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:04,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 157 [2023-08-26 16:59:04,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:04,594 INFO L124 PetriNetUnfolderBase]: 106/169 cut-off events. [2023-08-26 16:59:04,594 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 16:59:04,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 169 events. 106/169 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 535 event pairs, 45 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 277. Up to 167 conditions per place. [2023-08-26 16:59:04,597 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-26 16:59:04,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-26 16:59:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 16:59:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 16:59:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 169 transitions. [2023-08-26 16:59:04,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5382165605095541 [2023-08-26 16:59:04,609 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 169 transitions. [2023-08-26 16:59:04,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 169 transitions. [2023-08-26 16:59:04,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:04,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 169 transitions. [2023-08-26 16:59:04,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,619 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,621 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 58 flow. Second operand 2 states and 169 transitions. [2023-08-26 16:59:04,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-26 16:59:04,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 16:59:04,624 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-26 16:59:04,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-26 16:59:04,629 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 16:59:04,629 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-26 16:59:04,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:04,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 16:59:04,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 16:59:04,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:04,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:04,631 INFO L85 PathProgramCache]: Analyzing trace with hash 338263, now seen corresponding path program 1 times [2023-08-26 16:59:04,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:04,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564245746] [2023-08-26 16:59:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:04,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:04,722 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 16:59:04,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:04,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564245746] [2023-08-26 16:59:04,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564245746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:04,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:04,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:59:04,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525717279] [2023-08-26 16:59:04,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:04,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:59:04,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:04,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:59:04,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:59:04,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 157 [2023-08-26 16:59:04,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:04,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 157 [2023-08-26 16:59:04,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:04,766 INFO L124 PetriNetUnfolderBase]: 99/156 cut-off events. [2023-08-26 16:59:04,766 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 16:59:04,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 156 events. 99/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 482 event pairs, 42 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 313. Up to 153 conditions per place. [2023-08-26 16:59:04,768 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-26 16:59:04,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-26 16:59:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:59:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:59:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-08-26 16:59:04,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39065817409766457 [2023-08-26 16:59:04,770 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-08-26 16:59:04,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-08-26 16:59:04,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:04,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-08-26 16:59:04,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,773 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 184 transitions. [2023-08-26 16:59:04,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-26 16:59:04,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 16:59:04,774 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-26 16:59:04,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-26 16:59:04,775 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 16:59:04,775 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-26 16:59:04,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:04,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 16:59:04,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 16:59:04,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:04,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:04,776 INFO L85 PathProgramCache]: Analyzing trace with hash 338264, now seen corresponding path program 1 times [2023-08-26 16:59:04,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:04,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862075400] [2023-08-26 16:59:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:04,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:04,878 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 16:59:04,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:04,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862075400] [2023-08-26 16:59:04,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862075400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:04,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:04,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:59:04,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605347549] [2023-08-26 16:59:04,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:04,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:59:04,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:04,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:59:04,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:59:04,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 157 [2023-08-26 16:59:04,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:04,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 157 [2023-08-26 16:59:04,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:04,911 INFO L124 PetriNetUnfolderBase]: 92/143 cut-off events. [2023-08-26 16:59:04,912 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 16:59:04,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 143 events. 92/143 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 429 event pairs, 39 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 288. Up to 140 conditions per place. [2023-08-26 16:59:04,913 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 16:59:04,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-26 16:59:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:59:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:59:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2023-08-26 16:59:04,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3991507430997877 [2023-08-26 16:59:04,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2023-08-26 16:59:04,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2023-08-26 16:59:04,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:04,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2023-08-26 16:59:04,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,918 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,918 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 188 transitions. [2023-08-26 16:59:04,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-26 16:59:04,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:59:04,919 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-26 16:59:04,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-26 16:59:04,920 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 16:59:04,920 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-26 16:59:04,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:04,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:04,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 16:59:04,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 16:59:04,921 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:04,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:04,922 INFO L85 PathProgramCache]: Analyzing trace with hash 325080268, now seen corresponding path program 1 times [2023-08-26 16:59:04,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:04,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000754239] [2023-08-26 16:59:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:04,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:05,082 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 16:59:05,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:05,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000754239] [2023-08-26 16:59:05,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000754239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:05,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:05,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 16:59:05,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673072153] [2023-08-26 16:59:05,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:05,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:59:05,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:05,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:59:05,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 16:59:05,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 157 [2023-08-26 16:59:05,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:05,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 157 [2023-08-26 16:59:05,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:05,141 INFO L124 PetriNetUnfolderBase]: 70/112 cut-off events. [2023-08-26 16:59:05,141 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 16:59:05,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 112 events. 70/112 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 301 event pairs, 29 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 227. Up to 109 conditions per place. [2023-08-26 16:59:05,142 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 16:59:05,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-26 16:59:05,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:59:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:59:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2023-08-26 16:59:05,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36942675159235666 [2023-08-26 16:59:05,144 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 174 transitions. [2023-08-26 16:59:05,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 174 transitions. [2023-08-26 16:59:05,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:05,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 174 transitions. [2023-08-26 16:59:05,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,147 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,147 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 174 transitions. [2023-08-26 16:59:05,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-26 16:59:05,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:59:05,147 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-26 16:59:05,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-26 16:59:05,148 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 16:59:05,148 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-26 16:59:05,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:05,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 16:59:05,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 16:59:05,149 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:05,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:05,150 INFO L85 PathProgramCache]: Analyzing trace with hash 325080267, now seen corresponding path program 1 times [2023-08-26 16:59:05,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:05,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433302802] [2023-08-26 16:59:05,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:05,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:05,197 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 16:59:05,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:05,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433302802] [2023-08-26 16:59:05,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433302802] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:05,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:05,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 16:59:05,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903340570] [2023-08-26 16:59:05,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:05,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:59:05,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:05,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:59:05,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 16:59:05,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 157 [2023-08-26 16:59:05,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:05,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 157 [2023-08-26 16:59:05,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:05,223 INFO L124 PetriNetUnfolderBase]: 48/81 cut-off events. [2023-08-26 16:59:05,223 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 16:59:05,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 81 events. 48/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 183 event pairs, 19 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 166. Up to 78 conditions per place. [2023-08-26 16:59:05,224 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 16:59:05,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-26 16:59:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:59:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:59:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2023-08-26 16:59:05,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3609341825902335 [2023-08-26 16:59:05,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2023-08-26 16:59:05,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2023-08-26 16:59:05,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:05,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2023-08-26 16:59:05,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,228 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 170 transitions. [2023-08-26 16:59:05,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-26 16:59:05,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:59:05,229 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-26 16:59:05,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-26 16:59:05,230 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 16:59:05,230 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-26 16:59:05,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:05,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:05,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 16:59:05,231 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 16:59:05,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:05,231 INFO L85 PathProgramCache]: Analyzing trace with hash -982697004, now seen corresponding path program 1 times [2023-08-26 16:59:05,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:05,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983004778] [2023-08-26 16:59:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:05,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:05,313 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 16:59:05,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:05,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983004778] [2023-08-26 16:59:05,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983004778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:05,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:05,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:59:05,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453212065] [2023-08-26 16:59:05,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:05,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:59:05,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:05,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:59:05,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:59:05,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 157 [2023-08-26 16:59:05,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:05,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 157 [2023-08-26 16:59:05,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:05,358 INFO L124 PetriNetUnfolderBase]: 49/94 cut-off events. [2023-08-26 16:59:05,358 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 16:59:05,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 94 events. 49/94 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 265 event pairs, 13 based on Foata normal form. 1/68 useless extension candidates. Maximal degree in co-relation 194. Up to 65 conditions per place. [2023-08-26 16:59:05,359 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-08-26 16:59:05,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 104 flow [2023-08-26 16:59:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:59:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:59:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2023-08-26 16:59:05,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5095541401273885 [2023-08-26 16:59:05,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2023-08-26 16:59:05,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2023-08-26 16:59:05,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:05,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2023-08-26 16:59:05,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,363 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 240 transitions. [2023-08-26 16:59:05,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 104 flow [2023-08-26 16:59:05,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:59:05,364 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 52 flow [2023-08-26 16:59:05,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2023-08-26 16:59:05,365 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -4 predicate places. [2023-08-26 16:59:05,365 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 52 flow [2023-08-26 16:59:05,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:05,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:05,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 16:59:05,366 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 16:59:05,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:05,366 INFO L85 PathProgramCache]: Analyzing trace with hash 818083685, now seen corresponding path program 1 times [2023-08-26 16:59:05,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:05,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878498959] [2023-08-26 16:59:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:05,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:05,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:05,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878498959] [2023-08-26 16:59:05,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878498959] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:05,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:05,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:59:05,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769372385] [2023-08-26 16:59:05,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:05,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:59:05,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:05,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:59:05,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:59:05,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:05,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:05,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:05,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:05,497 INFO L124 PetriNetUnfolderBase]: 77/149 cut-off events. [2023-08-26 16:59:05,497 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-26 16:59:05,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 149 events. 77/149 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 442 event pairs, 24 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 351. Up to 78 conditions per place. [2023-08-26 16:59:05,499 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 30 selfloop transitions, 3 changer transitions 3/36 dead transitions. [2023-08-26 16:59:05,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 36 transitions, 181 flow [2023-08-26 16:59:05,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:59:05,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:59:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 334 transitions. [2023-08-26 16:59:05,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42547770700636944 [2023-08-26 16:59:05,501 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 334 transitions. [2023-08-26 16:59:05,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 334 transitions. [2023-08-26 16:59:05,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:05,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 334 transitions. [2023-08-26 16:59:05,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,504 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,504 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 52 flow. Second operand 5 states and 334 transitions. [2023-08-26 16:59:05,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 36 transitions, 181 flow [2023-08-26 16:59:05,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 36 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:59:05,505 INFO L231 Difference]: Finished difference. Result has 30 places, 18 transitions, 76 flow [2023-08-26 16:59:05,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=30, PETRI_TRANSITIONS=18} [2023-08-26 16:59:05,506 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-08-26 16:59:05,506 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 18 transitions, 76 flow [2023-08-26 16:59:05,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:05,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:05,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 16:59:05,507 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 16:59:05,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:05,508 INFO L85 PathProgramCache]: Analyzing trace with hash 341829043, now seen corresponding path program 2 times [2023-08-26 16:59:05,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:05,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316386781] [2023-08-26 16:59:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:05,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:05,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:05,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316386781] [2023-08-26 16:59:05,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316386781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:05,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687254967] [2023-08-26 16:59:05,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:59:05,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:05,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:05,569 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:05,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 16:59:05,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:05,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:05,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 16:59:05,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:05,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:05,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687254967] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:05,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:05,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-26 16:59:05,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063753719] [2023-08-26 16:59:05,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:05,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 16:59:05,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:05,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 16:59:05,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 16:59:05,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:05,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 18 transitions, 76 flow. Second operand has 8 states, 8 states have (on average 62.625) internal successors, (501), 8 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:05,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:05,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:05,854 INFO L124 PetriNetUnfolderBase]: 82/158 cut-off events. [2023-08-26 16:59:05,854 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2023-08-26 16:59:05,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 158 events. 82/158 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 493 event pairs, 13 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 483. Up to 53 conditions per place. [2023-08-26 16:59:05,856 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 35 selfloop transitions, 8 changer transitions 5/48 dead transitions. [2023-08-26 16:59:05,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 48 transitions, 286 flow [2023-08-26 16:59:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:59:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:59:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2023-08-26 16:59:05,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4240218380345769 [2023-08-26 16:59:05,858 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2023-08-26 16:59:05,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2023-08-26 16:59:05,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:05,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2023-08-26 16:59:05,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,861 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,861 INFO L175 Difference]: Start difference. First operand has 30 places, 18 transitions, 76 flow. Second operand 7 states and 466 transitions. [2023-08-26 16:59:05,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 48 transitions, 286 flow [2023-08-26 16:59:05,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 48 transitions, 262 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-26 16:59:05,869 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 127 flow [2023-08-26 16:59:05,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=127, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-08-26 16:59:05,871 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2023-08-26 16:59:05,871 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 127 flow [2023-08-26 16:59:05,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 62.625) internal successors, (501), 8 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:05,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:05,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:05,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 16:59:06,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:06,080 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 16:59:06,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:06,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1050384565, now seen corresponding path program 3 times [2023-08-26 16:59:06,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:06,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699113380] [2023-08-26 16:59:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:06,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:06,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:06,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699113380] [2023-08-26 16:59:06,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699113380] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:06,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:06,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:59:06,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204449057] [2023-08-26 16:59:06,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:06,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:59:06,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:06,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:59:06,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:59:06,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:06,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 23 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:06,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:06,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:06,209 INFO L124 PetriNetUnfolderBase]: 71/136 cut-off events. [2023-08-26 16:59:06,209 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2023-08-26 16:59:06,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 136 events. 71/136 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 355 event pairs, 21 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 490. Up to 99 conditions per place. [2023-08-26 16:59:06,211 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 23 selfloop transitions, 9 changer transitions 2/34 dead transitions. [2023-08-26 16:59:06,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 246 flow [2023-08-26 16:59:06,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:59:06,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:59:06,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 328 transitions. [2023-08-26 16:59:06,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178343949044586 [2023-08-26 16:59:06,213 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 328 transitions. [2023-08-26 16:59:06,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 328 transitions. [2023-08-26 16:59:06,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:06,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 328 transitions. [2023-08-26 16:59:06,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,215 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,215 INFO L175 Difference]: Start difference. First operand has 37 places, 23 transitions, 127 flow. Second operand 5 states and 328 transitions. [2023-08-26 16:59:06,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 246 flow [2023-08-26 16:59:06,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 230 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-26 16:59:06,218 INFO L231 Difference]: Finished difference. Result has 42 places, 25 transitions, 162 flow [2023-08-26 16:59:06,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=42, PETRI_TRANSITIONS=25} [2023-08-26 16:59:06,219 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2023-08-26 16:59:06,219 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 25 transitions, 162 flow [2023-08-26 16:59:06,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:06,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:06,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 16:59:06,220 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 16:59:06,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:06,220 INFO L85 PathProgramCache]: Analyzing trace with hash -936524697, now seen corresponding path program 4 times [2023-08-26 16:59:06,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:06,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962970372] [2023-08-26 16:59:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:06,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:06,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:06,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962970372] [2023-08-26 16:59:06,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962970372] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:59:06,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:59:06,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:59:06,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922982535] [2023-08-26 16:59:06,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:59:06,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:59:06,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:06,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:59:06,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:59:06,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:06,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 25 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:06,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:06,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:06,317 INFO L124 PetriNetUnfolderBase]: 68/131 cut-off events. [2023-08-26 16:59:06,317 INFO L125 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2023-08-26 16:59:06,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 131 events. 68/131 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 338 event pairs, 28 based on Foata normal form. 2/133 useless extension candidates. Maximal degree in co-relation 531. Up to 116 conditions per place. [2023-08-26 16:59:06,318 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 25 selfloop transitions, 6 changer transitions 2/33 dead transitions. [2023-08-26 16:59:06,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 33 transitions, 271 flow [2023-08-26 16:59:06,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:59:06,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:59:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 325 transitions. [2023-08-26 16:59:06,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140127388535032 [2023-08-26 16:59:06,320 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 325 transitions. [2023-08-26 16:59:06,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 325 transitions. [2023-08-26 16:59:06,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:06,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 325 transitions. [2023-08-26 16:59:06,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,322 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,323 INFO L175 Difference]: Start difference. First operand has 42 places, 25 transitions, 162 flow. Second operand 5 states and 325 transitions. [2023-08-26 16:59:06,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 33 transitions, 271 flow [2023-08-26 16:59:06,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 247 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 16:59:06,325 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 182 flow [2023-08-26 16:59:06,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=44, PETRI_TRANSITIONS=27} [2023-08-26 16:59:06,326 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2023-08-26 16:59:06,326 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 182 flow [2023-08-26 16:59:06,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:06,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:06,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 16:59:06,327 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 16:59:06,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:06,327 INFO L85 PathProgramCache]: Analyzing trace with hash 76375887, now seen corresponding path program 5 times [2023-08-26 16:59:06,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:06,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722580958] [2023-08-26 16:59:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:06,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:06,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:06,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722580958] [2023-08-26 16:59:06,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722580958] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:06,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813780770] [2023-08-26 16:59:06,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:59:06,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:06,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:06,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:06,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 16:59:06,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:06,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:06,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 16:59:06,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:06,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:06,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813780770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:06,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:06,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 16:59:06,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919850157] [2023-08-26 16:59:06,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:06,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 16:59:06,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:06,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 16:59:06,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-26 16:59:06,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:06,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 182 flow. Second operand has 10 states, 10 states have (on average 62.5) internal successors, (625), 10 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:06,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:06,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:06,656 INFO L124 PetriNetUnfolderBase]: 83/156 cut-off events. [2023-08-26 16:59:06,656 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2023-08-26 16:59:06,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 156 events. 83/156 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 444 event pairs, 14 based on Foata normal form. 6/162 useless extension candidates. Maximal degree in co-relation 623. Up to 82 conditions per place. [2023-08-26 16:59:06,657 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 39 selfloop transitions, 17 changer transitions 0/56 dead transitions. [2023-08-26 16:59:06,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 420 flow [2023-08-26 16:59:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 16:59:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 16:59:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 650 transitions. [2023-08-26 16:59:06,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140127388535032 [2023-08-26 16:59:06,660 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 650 transitions. [2023-08-26 16:59:06,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 650 transitions. [2023-08-26 16:59:06,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:06,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 650 transitions. [2023-08-26 16:59:06,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 65.0) internal successors, (650), 10 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 157.0) internal successors, (1727), 11 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,667 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 157.0) internal successors, (1727), 11 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,667 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 182 flow. Second operand 10 states and 650 transitions. [2023-08-26 16:59:06,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 420 flow [2023-08-26 16:59:06,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 404 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-26 16:59:06,670 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 273 flow [2023-08-26 16:59:06,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=273, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-08-26 16:59:06,671 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 26 predicate places. [2023-08-26 16:59:06,671 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 273 flow [2023-08-26 16:59:06,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.5) internal successors, (625), 10 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:06,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:06,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:06,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:06,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-26 16:59:06,878 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 16:59:06,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:06,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1022084289, now seen corresponding path program 6 times [2023-08-26 16:59:06,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:06,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349442256] [2023-08-26 16:59:06,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:06,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:06,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:06,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349442256] [2023-08-26 16:59:06,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349442256] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:06,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404498733] [2023-08-26 16:59:06,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:59:06,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:06,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:06,937 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:06,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 16:59:06,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 16:59:06,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:06,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 16:59:06,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:07,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:07,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404498733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:07,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:07,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 16:59:07,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157191504] [2023-08-26 16:59:07,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:07,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 16:59:07,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:07,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 16:59:07,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-26 16:59:07,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:07,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 273 flow. Second operand has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:07,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:07,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:07,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:07,177 INFO L124 PetriNetUnfolderBase]: 75/140 cut-off events. [2023-08-26 16:59:07,177 INFO L125 PetriNetUnfolderBase]: For 560/560 co-relation queries the response was YES. [2023-08-26 16:59:07,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 140 events. 75/140 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 373 event pairs, 18 based on Foata normal form. 6/146 useless extension candidates. Maximal degree in co-relation 631. Up to 90 conditions per place. [2023-08-26 16:59:07,179 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 30 selfloop transitions, 15 changer transitions 1/46 dead transitions. [2023-08-26 16:59:07,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 46 transitions, 416 flow [2023-08-26 16:59:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 16:59:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 16:59:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 395 transitions. [2023-08-26 16:59:07,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41932059447983017 [2023-08-26 16:59:07,181 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 395 transitions. [2023-08-26 16:59:07,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 395 transitions. [2023-08-26 16:59:07,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:07,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 395 transitions. [2023-08-26 16:59:07,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:07,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:07,184 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:07,184 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 273 flow. Second operand 6 states and 395 transitions. [2023-08-26 16:59:07,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 46 transitions, 416 flow [2023-08-26 16:59:07,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 372 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-26 16:59:07,188 INFO L231 Difference]: Finished difference. Result has 55 places, 35 transitions, 268 flow [2023-08-26 16:59:07,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=55, PETRI_TRANSITIONS=35} [2023-08-26 16:59:07,189 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2023-08-26 16:59:07,189 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 35 transitions, 268 flow [2023-08-26 16:59:07,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:07,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:07,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:07,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:07,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:07,395 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 16:59:07,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:07,396 INFO L85 PathProgramCache]: Analyzing trace with hash 205237955, now seen corresponding path program 1 times [2023-08-26 16:59:07,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:07,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345003753] [2023-08-26 16:59:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:07,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:07,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:07,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345003753] [2023-08-26 16:59:07,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345003753] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:07,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504111194] [2023-08-26 16:59:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:07,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:07,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:07,510 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:07,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 16:59:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:07,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 16:59:07,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:07,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:07,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504111194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:07,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:07,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2023-08-26 16:59:07,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977403537] [2023-08-26 16:59:07,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:07,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:59:07,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:07,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:59:07,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 16:59:07,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 157 [2023-08-26 16:59:07,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 35 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:07,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:07,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 157 [2023-08-26 16:59:07,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:07,696 INFO L124 PetriNetUnfolderBase]: 122/230 cut-off events. [2023-08-26 16:59:07,697 INFO L125 PetriNetUnfolderBase]: For 643/655 co-relation queries the response was YES. [2023-08-26 16:59:07,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 230 events. 122/230 cut-off events. For 643/655 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 795 event pairs, 8 based on Foata normal form. 16/243 useless extension candidates. Maximal degree in co-relation 970. Up to 113 conditions per place. [2023-08-26 16:59:07,699 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 38 selfloop transitions, 11 changer transitions 10/65 dead transitions. [2023-08-26 16:59:07,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 557 flow [2023-08-26 16:59:07,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 16:59:07,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 16:59:07,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 323 transitions. [2023-08-26 16:59:07,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5143312101910829 [2023-08-26 16:59:07,700 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 323 transitions. [2023-08-26 16:59:07,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 323 transitions. [2023-08-26 16:59:07,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:07,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 323 transitions. [2023-08-26 16:59:07,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.75) internal successors, (323), 4 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 16:59:07,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:07,703 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:07,703 INFO L175 Difference]: Start difference. First operand has 55 places, 35 transitions, 268 flow. Second operand 4 states and 323 transitions. [2023-08-26 16:59:07,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 557 flow [2023-08-26 16:59:07,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 454 flow, removed 19 selfloop flow, removed 9 redundant places. [2023-08-26 16:59:07,707 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 307 flow [2023-08-26 16:59:07,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-08-26 16:59:07,707 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2023-08-26 16:59:07,708 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 307 flow [2023-08-26 16:59:07,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:07,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:07,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:07,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:07,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:07,914 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:07,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:07,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1035497238, now seen corresponding path program 2 times [2023-08-26 16:59:07,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:07,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49781554] [2023-08-26 16:59:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:07,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:07,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:07,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49781554] [2023-08-26 16:59:07,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49781554] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:07,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313602207] [2023-08-26 16:59:07,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:59:07,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:07,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:07,985 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:07,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 16:59:08,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:08,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:08,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 16:59:08,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:08,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:08,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313602207] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:08,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:08,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-26 16:59:08,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836718492] [2023-08-26 16:59:08,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:08,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 16:59:08,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:08,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 16:59:08,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-26 16:59:08,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:08,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 307 flow. Second operand has 12 states, 12 states have (on average 62.25) internal successors, (747), 12 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:08,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:08,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:08,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:08,348 INFO L124 PetriNetUnfolderBase]: 182/328 cut-off events. [2023-08-26 16:59:08,348 INFO L125 PetriNetUnfolderBase]: For 701/701 co-relation queries the response was YES. [2023-08-26 16:59:08,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 328 events. 182/328 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1188 event pairs, 34 based on Foata normal form. 12/340 useless extension candidates. Maximal degree in co-relation 1362. Up to 169 conditions per place. [2023-08-26 16:59:08,350 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 49 selfloop transitions, 37 changer transitions 1/87 dead transitions. [2023-08-26 16:59:08,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 87 transitions, 756 flow [2023-08-26 16:59:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 16:59:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 16:59:08,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 842 transitions. [2023-08-26 16:59:08,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41254287114159727 [2023-08-26 16:59:08,353 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 842 transitions. [2023-08-26 16:59:08,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 842 transitions. [2023-08-26 16:59:08,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:08,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 842 transitions. [2023-08-26 16:59:08,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 64.76923076923077) internal successors, (842), 13 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:08,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:08,359 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:08,359 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 307 flow. Second operand 13 states and 842 transitions. [2023-08-26 16:59:08,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 87 transitions, 756 flow [2023-08-26 16:59:08,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 730 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-08-26 16:59:08,363 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 586 flow [2023-08-26 16:59:08,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=586, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2023-08-26 16:59:08,364 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 38 predicate places. [2023-08-26 16:59:08,364 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 586 flow [2023-08-26 16:59:08,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 62.25) internal successors, (747), 12 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:08,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:08,365 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:08,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:08,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-26 16:59:08,570 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:08,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:08,570 INFO L85 PathProgramCache]: Analyzing trace with hash 224847548, now seen corresponding path program 3 times [2023-08-26 16:59:08,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:08,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968362430] [2023-08-26 16:59:08,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:08,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:08,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:08,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968362430] [2023-08-26 16:59:08,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968362430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:08,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575828047] [2023-08-26 16:59:08,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:59:08,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:08,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:08,640 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:08,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 16:59:08,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 16:59:08,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:08,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 16:59:08,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:08,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:08,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575828047] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:08,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:08,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-26 16:59:08,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150842220] [2023-08-26 16:59:08,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:08,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 16:59:08,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:08,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 16:59:08,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-26 16:59:08,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:08,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 586 flow. Second operand has 11 states, 11 states have (on average 62.45454545454545) internal successors, (687), 11 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:08,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:08,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:08,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:08,981 INFO L124 PetriNetUnfolderBase]: 209/382 cut-off events. [2023-08-26 16:59:08,981 INFO L125 PetriNetUnfolderBase]: For 1164/1164 co-relation queries the response was YES. [2023-08-26 16:59:08,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 382 events. 209/382 cut-off events. For 1164/1164 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1480 event pairs, 17 based on Foata normal form. 8/390 useless extension candidates. Maximal degree in co-relation 1890. Up to 122 conditions per place. [2023-08-26 16:59:08,984 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 67 selfloop transitions, 32 changer transitions 12/111 dead transitions. [2023-08-26 16:59:08,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 111 transitions, 1110 flow [2023-08-26 16:59:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 16:59:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 16:59:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 660 transitions. [2023-08-26 16:59:08,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42038216560509556 [2023-08-26 16:59:08,987 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 660 transitions. [2023-08-26 16:59:08,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 660 transitions. [2023-08-26 16:59:08,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:08,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 660 transitions. [2023-08-26 16:59:08,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:08,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 157.0) internal successors, (1727), 11 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:08,991 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 157.0) internal successors, (1727), 11 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:08,991 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 586 flow. Second operand 10 states and 660 transitions. [2023-08-26 16:59:08,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 111 transitions, 1110 flow [2023-08-26 16:59:08,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 111 transitions, 958 flow, removed 53 selfloop flow, removed 5 redundant places. [2023-08-26 16:59:09,000 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 701 flow [2023-08-26 16:59:09,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=701, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2023-08-26 16:59:09,001 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 48 predicate places. [2023-08-26 16:59:09,001 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 701 flow [2023-08-26 16:59:09,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 62.45454545454545) internal successors, (687), 11 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:09,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:09,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:09,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:09,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 16:59:09,207 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:09,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash -189957706, now seen corresponding path program 4 times [2023-08-26 16:59:09,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:09,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534372581] [2023-08-26 16:59:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:09,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:09,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:09,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534372581] [2023-08-26 16:59:09,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534372581] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:09,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154122223] [2023-08-26 16:59:09,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:59:09,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:09,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:09,281 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:09,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 16:59:09,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:59:09,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:09,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 16:59:09,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:09,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:09,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154122223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:09,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:09,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-26 16:59:09,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031059080] [2023-08-26 16:59:09,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:09,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 16:59:09,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:09,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 16:59:09,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-26 16:59:09,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:09,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 701 flow. Second operand has 13 states, 13 states have (on average 62.15384615384615) internal successors, (808), 13 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:09,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:09,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:09,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:09,692 INFO L124 PetriNetUnfolderBase]: 244/426 cut-off events. [2023-08-26 16:59:09,692 INFO L125 PetriNetUnfolderBase]: For 1967/1967 co-relation queries the response was YES. [2023-08-26 16:59:09,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2353 conditions, 426 events. 244/426 cut-off events. For 1967/1967 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1584 event pairs, 24 based on Foata normal form. 22/448 useless extension candidates. Maximal degree in co-relation 2325. Up to 162 conditions per place. [2023-08-26 16:59:09,696 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 74 selfloop transitions, 52 changer transitions 0/126 dead transitions. [2023-08-26 16:59:09,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1307 flow [2023-08-26 16:59:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 16:59:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 16:59:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 913 transitions. [2023-08-26 16:59:09,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153776160145587 [2023-08-26 16:59:09,699 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 913 transitions. [2023-08-26 16:59:09,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 913 transitions. [2023-08-26 16:59:09,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:09,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 913 transitions. [2023-08-26 16:59:09,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.21428571428571) internal successors, (913), 14 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:09,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 157.0) internal successors, (2355), 15 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:09,706 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 157.0) internal successors, (2355), 15 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:09,706 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 701 flow. Second operand 14 states and 913 transitions. [2023-08-26 16:59:09,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1307 flow [2023-08-26 16:59:09,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1233 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-08-26 16:59:09,717 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 1055 flow [2023-08-26 16:59:09,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1055, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2023-08-26 16:59:09,718 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 65 predicate places. [2023-08-26 16:59:09,718 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 1055 flow [2023-08-26 16:59:09,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 62.15384615384615) internal successors, (808), 13 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:09,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:09,719 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:09,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:09,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:09,927 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:09,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:09,927 INFO L85 PathProgramCache]: Analyzing trace with hash 449587140, now seen corresponding path program 5 times [2023-08-26 16:59:09,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:09,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249628489] [2023-08-26 16:59:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:09,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:10,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:10,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249628489] [2023-08-26 16:59:10,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249628489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:10,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803718252] [2023-08-26 16:59:10,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:59:10,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:10,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:10,016 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:10,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 16:59:10,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:10,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:10,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 16:59:10,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:10,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:10,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803718252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:10,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:10,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-26 16:59:10,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840625327] [2023-08-26 16:59:10,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:10,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 16:59:10,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:10,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 16:59:10,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-26 16:59:10,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:10,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 transitions, 1055 flow. Second operand has 12 states, 12 states have (on average 62.333333333333336) internal successors, (748), 12 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:10,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:10,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:10,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:10,459 INFO L124 PetriNetUnfolderBase]: 247/455 cut-off events. [2023-08-26 16:59:10,460 INFO L125 PetriNetUnfolderBase]: For 3132/3132 co-relation queries the response was YES. [2023-08-26 16:59:10,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2670 conditions, 455 events. 247/455 cut-off events. For 3132/3132 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1835 event pairs, 26 based on Foata normal form. 26/481 useless extension candidates. Maximal degree in co-relation 2635. Up to 175 conditions per place. [2023-08-26 16:59:10,463 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 58 selfloop transitions, 72 changer transitions 1/131 dead transitions. [2023-08-26 16:59:10,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 131 transitions, 1527 flow [2023-08-26 16:59:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 16:59:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 16:59:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1038 transitions. [2023-08-26 16:59:10,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41321656050955413 [2023-08-26 16:59:10,466 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1038 transitions. [2023-08-26 16:59:10,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1038 transitions. [2023-08-26 16:59:10,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:10,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1038 transitions. [2023-08-26 16:59:10,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 64.875) internal successors, (1038), 16 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:10,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 157.0) internal successors, (2669), 17 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:10,472 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 157.0) internal successors, (2669), 17 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:10,472 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 1055 flow. Second operand 16 states and 1038 transitions. [2023-08-26 16:59:10,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 131 transitions, 1527 flow [2023-08-26 16:59:10,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 131 transitions, 1377 flow, removed 61 selfloop flow, removed 6 redundant places. [2023-08-26 16:59:10,487 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 1164 flow [2023-08-26 16:59:10,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1164, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2023-08-26 16:59:10,488 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 77 predicate places. [2023-08-26 16:59:10,488 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 1164 flow [2023-08-26 16:59:10,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 62.333333333333336) internal successors, (748), 12 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:10,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:10,488 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:10,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:10,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-26 16:59:10,700 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:10,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:10,700 INFO L85 PathProgramCache]: Analyzing trace with hash -24499298, now seen corresponding path program 6 times [2023-08-26 16:59:10,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:10,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310504302] [2023-08-26 16:59:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:10,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:10,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:10,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310504302] [2023-08-26 16:59:10,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310504302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:10,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598225086] [2023-08-26 16:59:10,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:59:10,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:10,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:10,765 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:10,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 16:59:10,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 16:59:10,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:10,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 16:59:10,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:10,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:10,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598225086] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:10,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:10,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-26 16:59:10,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461539884] [2023-08-26 16:59:10,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:10,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 16:59:10,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:10,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 16:59:10,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-26 16:59:10,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:10,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 1164 flow. Second operand has 15 states, 15 states have (on average 62.06666666666667) internal successors, (931), 15 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:10,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:10,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:10,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:11,352 INFO L124 PetriNetUnfolderBase]: 396/722 cut-off events. [2023-08-26 16:59:11,352 INFO L125 PetriNetUnfolderBase]: For 4799/4799 co-relation queries the response was YES. [2023-08-26 16:59:11,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4358 conditions, 722 events. 396/722 cut-off events. For 4799/4799 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3383 event pairs, 28 based on Foata normal form. 10/732 useless extension candidates. Maximal degree in co-relation 4321. Up to 237 conditions per place. [2023-08-26 16:59:11,360 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 86 selfloop transitions, 120 changer transitions 1/207 dead transitions. [2023-08-26 16:59:11,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 207 transitions, 2550 flow [2023-08-26 16:59:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 16:59:11,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 16:59:11,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1483 transitions. [2023-08-26 16:59:11,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41068955967875936 [2023-08-26 16:59:11,364 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1483 transitions. [2023-08-26 16:59:11,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1483 transitions. [2023-08-26 16:59:11,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:11,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1483 transitions. [2023-08-26 16:59:11,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 64.47826086956522) internal successors, (1483), 23 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:11,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 157.0) internal successors, (3768), 24 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:11,372 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 157.0) internal successors, (3768), 24 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:11,372 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 1164 flow. Second operand 23 states and 1483 transitions. [2023-08-26 16:59:11,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 207 transitions, 2550 flow [2023-08-26 16:59:11,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 207 transitions, 2298 flow, removed 41 selfloop flow, removed 11 redundant places. [2023-08-26 16:59:11,409 INFO L231 Difference]: Finished difference. Result has 122 places, 165 transitions, 2120 flow [2023-08-26 16:59:11,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2120, PETRI_PLACES=122, PETRI_TRANSITIONS=165} [2023-08-26 16:59:11,410 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 94 predicate places. [2023-08-26 16:59:11,410 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 165 transitions, 2120 flow [2023-08-26 16:59:11,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.06666666666667) internal successors, (931), 15 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:11,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:11,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:11,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:11,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 16:59:11,616 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:11,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:11,616 INFO L85 PathProgramCache]: Analyzing trace with hash 597494722, now seen corresponding path program 7 times [2023-08-26 16:59:11,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:11,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305935499] [2023-08-26 16:59:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:11,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:11,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:11,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305935499] [2023-08-26 16:59:11,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305935499] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:11,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162229651] [2023-08-26 16:59:11,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 16:59:11,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:11,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:11,685 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:11,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 16:59:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:11,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 16:59:11,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:11,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:11,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162229651] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:11,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:11,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-26 16:59:11,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011302104] [2023-08-26 16:59:11,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:11,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 16:59:11,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:11,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 16:59:11,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-26 16:59:11,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:11,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 165 transitions, 2120 flow. Second operand has 15 states, 15 states have (on average 61.8) internal successors, (927), 15 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:11,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:11,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:11,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:12,216 INFO L124 PetriNetUnfolderBase]: 438/790 cut-off events. [2023-08-26 16:59:12,217 INFO L125 PetriNetUnfolderBase]: For 6871/6871 co-relation queries the response was YES. [2023-08-26 16:59:12,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5311 conditions, 790 events. 438/790 cut-off events. For 6871/6871 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3706 event pairs, 97 based on Foata normal form. 34/824 useless extension candidates. Maximal degree in co-relation 5267. Up to 620 conditions per place. [2023-08-26 16:59:12,224 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 171 selfloop transitions, 54 changer transitions 0/225 dead transitions. [2023-08-26 16:59:12,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 225 transitions, 3163 flow [2023-08-26 16:59:12,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 16:59:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 16:59:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1170 transitions. [2023-08-26 16:59:12,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140127388535032 [2023-08-26 16:59:12,227 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1170 transitions. [2023-08-26 16:59:12,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1170 transitions. [2023-08-26 16:59:12,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:12,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1170 transitions. [2023-08-26 16:59:12,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 65.0) internal successors, (1170), 18 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:12,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:12,232 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:12,233 INFO L175 Difference]: Start difference. First operand has 122 places, 165 transitions, 2120 flow. Second operand 18 states and 1170 transitions. [2023-08-26 16:59:12,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 225 transitions, 3163 flow [2023-08-26 16:59:12,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 225 transitions, 3005 flow, removed 54 selfloop flow, removed 8 redundant places. [2023-08-26 16:59:12,267 INFO L231 Difference]: Finished difference. Result has 143 places, 193 transitions, 2614 flow [2023-08-26 16:59:12,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2614, PETRI_PLACES=143, PETRI_TRANSITIONS=193} [2023-08-26 16:59:12,268 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 115 predicate places. [2023-08-26 16:59:12,268 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 193 transitions, 2614 flow [2023-08-26 16:59:12,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.8) internal successors, (927), 15 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:12,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:12,269 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:12,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-26 16:59:12,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:12,474 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:12,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:12,474 INFO L85 PathProgramCache]: Analyzing trace with hash 265687706, now seen corresponding path program 8 times [2023-08-26 16:59:12,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:12,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005893313] [2023-08-26 16:59:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:12,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:12,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:12,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005893313] [2023-08-26 16:59:12,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005893313] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:12,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199495168] [2023-08-26 16:59:12,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:59:12,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:12,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:12,551 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:12,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 16:59:12,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:12,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:12,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 16:59:12,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:12,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:12,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199495168] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:12,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:12,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-26 16:59:12,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421610800] [2023-08-26 16:59:12,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:12,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 16:59:12,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:12,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 16:59:12,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-26 16:59:12,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:12,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 193 transitions, 2614 flow. Second operand has 13 states, 13 states have (on average 62.0) internal successors, (806), 13 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:12,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:12,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:12,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:12,924 INFO L124 PetriNetUnfolderBase]: 443/793 cut-off events. [2023-08-26 16:59:12,924 INFO L125 PetriNetUnfolderBase]: For 9789/9789 co-relation queries the response was YES. [2023-08-26 16:59:12,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5701 conditions, 793 events. 443/793 cut-off events. For 9789/9789 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3699 event pairs, 98 based on Foata normal form. 6/799 useless extension candidates. Maximal degree in co-relation 5644. Up to 645 conditions per place. [2023-08-26 16:59:12,933 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 160 selfloop transitions, 50 changer transitions 3/213 dead transitions. [2023-08-26 16:59:12,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 213 transitions, 3280 flow [2023-08-26 16:59:12,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 16:59:12,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 16:59:12,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 711 transitions. [2023-08-26 16:59:12,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41169658367110595 [2023-08-26 16:59:12,935 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 711 transitions. [2023-08-26 16:59:12,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 711 transitions. [2023-08-26 16:59:12,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:12,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 711 transitions. [2023-08-26 16:59:12,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 64.63636363636364) internal successors, (711), 11 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:12,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 157.0) internal successors, (1884), 12 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:12,938 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 157.0) internal successors, (1884), 12 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:12,939 INFO L175 Difference]: Start difference. First operand has 143 places, 193 transitions, 2614 flow. Second operand 11 states and 711 transitions. [2023-08-26 16:59:12,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 213 transitions, 3280 flow [2023-08-26 16:59:12,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 213 transitions, 2906 flow, removed 171 selfloop flow, removed 5 redundant places. [2023-08-26 16:59:12,988 INFO L231 Difference]: Finished difference. Result has 149 places, 195 transitions, 2404 flow [2023-08-26 16:59:12,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2248, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2404, PETRI_PLACES=149, PETRI_TRANSITIONS=195} [2023-08-26 16:59:12,989 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 121 predicate places. [2023-08-26 16:59:12,989 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 195 transitions, 2404 flow [2023-08-26 16:59:12,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 62.0) internal successors, (806), 13 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:12,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:12,994 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:13,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:13,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:13,199 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:13,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:13,200 INFO L85 PathProgramCache]: Analyzing trace with hash -736641802, now seen corresponding path program 9 times [2023-08-26 16:59:13,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:13,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163956991] [2023-08-26 16:59:13,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:13,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:13,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:13,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163956991] [2023-08-26 16:59:13,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163956991] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:13,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368621149] [2023-08-26 16:59:13,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:59:13,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:13,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:13,325 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:13,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 16:59:13,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 16:59:13,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:13,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 16:59:13,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:13,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:13,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368621149] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:13,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:13,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-26 16:59:13,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391099854] [2023-08-26 16:59:13,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:13,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:59:13,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:13,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:59:13,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:59:13,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 157 [2023-08-26 16:59:13,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 195 transitions, 2404 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:13,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:13,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 157 [2023-08-26 16:59:13,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:13,733 INFO L124 PetriNetUnfolderBase]: 654/1167 cut-off events. [2023-08-26 16:59:13,733 INFO L125 PetriNetUnfolderBase]: For 12992/13002 co-relation queries the response was YES. [2023-08-26 16:59:13,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8144 conditions, 1167 events. 654/1167 cut-off events. For 12992/13002 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6074 event pairs, 28 based on Foata normal form. 15/1179 useless extension candidates. Maximal degree in co-relation 8086. Up to 620 conditions per place. [2023-08-26 16:59:13,748 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 192 selfloop transitions, 81 changer transitions 47/327 dead transitions. [2023-08-26 16:59:13,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 327 transitions, 4587 flow [2023-08-26 16:59:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:59:13,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:59:13,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 406 transitions. [2023-08-26 16:59:13,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171974522292994 [2023-08-26 16:59:13,749 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 406 transitions. [2023-08-26 16:59:13,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 406 transitions. [2023-08-26 16:59:13,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:13,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 406 transitions. [2023-08-26 16:59:13,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.2) internal successors, (406), 5 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:13,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:13,751 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:13,752 INFO L175 Difference]: Start difference. First operand has 149 places, 195 transitions, 2404 flow. Second operand 5 states and 406 transitions. [2023-08-26 16:59:13,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 327 transitions, 4587 flow [2023-08-26 16:59:13,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 327 transitions, 4492 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-26 16:59:13,816 INFO L231 Difference]: Finished difference. Result has 151 places, 241 transitions, 3220 flow [2023-08-26 16:59:13,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3220, PETRI_PLACES=151, PETRI_TRANSITIONS=241} [2023-08-26 16:59:13,817 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 123 predicate places. [2023-08-26 16:59:13,817 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 241 transitions, 3220 flow [2023-08-26 16:59:13,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:13,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:13,817 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:13,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:14,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-26 16:59:14,023 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:14,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:14,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1723445501, now seen corresponding path program 10 times [2023-08-26 16:59:14,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:14,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012181517] [2023-08-26 16:59:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:14,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:14,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:14,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012181517] [2023-08-26 16:59:14,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012181517] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:14,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609812870] [2023-08-26 16:59:14,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:59:14,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:14,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:14,146 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:14,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 16:59:14,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:59:14,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:14,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 16:59:14,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:14,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:14,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609812870] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:14,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:14,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-26 16:59:14,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987778623] [2023-08-26 16:59:14,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:14,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 16:59:14,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:14,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 16:59:14,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-26 16:59:14,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:14,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 241 transitions, 3220 flow. Second operand has 14 states, 14 states have (on average 61.857142857142854) internal successors, (866), 14 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:14,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:14,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:14,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:14,706 INFO L124 PetriNetUnfolderBase]: 775/1418 cut-off events. [2023-08-26 16:59:14,706 INFO L125 PetriNetUnfolderBase]: For 18444/18444 co-relation queries the response was YES. [2023-08-26 16:59:14,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10577 conditions, 1418 events. 775/1418 cut-off events. For 18444/18444 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 7876 event pairs, 33 based on Foata normal form. 10/1428 useless extension candidates. Maximal degree in co-relation 10516. Up to 564 conditions per place. [2023-08-26 16:59:14,728 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 214 selfloop transitions, 129 changer transitions 21/364 dead transitions. [2023-08-26 16:59:14,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 364 transitions, 5450 flow [2023-08-26 16:59:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 16:59:14,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 16:59:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 854 transitions. [2023-08-26 16:59:14,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41842234198922096 [2023-08-26 16:59:14,730 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 854 transitions. [2023-08-26 16:59:14,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 854 transitions. [2023-08-26 16:59:14,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:14,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 854 transitions. [2023-08-26 16:59:14,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.6923076923077) internal successors, (854), 13 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:14,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:14,734 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:14,734 INFO L175 Difference]: Start difference. First operand has 151 places, 241 transitions, 3220 flow. Second operand 13 states and 854 transitions. [2023-08-26 16:59:14,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 364 transitions, 5450 flow [2023-08-26 16:59:14,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 364 transitions, 5344 flow, removed 53 selfloop flow, removed 0 redundant places. [2023-08-26 16:59:14,832 INFO L231 Difference]: Finished difference. Result has 171 places, 303 transitions, 4599 flow [2023-08-26 16:59:14,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=3134, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4599, PETRI_PLACES=171, PETRI_TRANSITIONS=303} [2023-08-26 16:59:14,832 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 143 predicate places. [2023-08-26 16:59:14,832 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 303 transitions, 4599 flow [2023-08-26 16:59:14,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 61.857142857142854) internal successors, (866), 14 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:14,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:14,833 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:14,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:15,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-26 16:59:15,038 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:15,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:15,038 INFO L85 PathProgramCache]: Analyzing trace with hash 88872559, now seen corresponding path program 11 times [2023-08-26 16:59:15,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:15,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516356763] [2023-08-26 16:59:15,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:15,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:15,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:15,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516356763] [2023-08-26 16:59:15,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516356763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:15,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546286426] [2023-08-26 16:59:15,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:59:15,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:15,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:15,121 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:15,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-26 16:59:15,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 16:59:15,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:15,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 16:59:15,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:15,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:15,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546286426] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:15,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:15,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-26 16:59:15,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721263922] [2023-08-26 16:59:15,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:15,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 16:59:15,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:15,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 16:59:15,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-26 16:59:15,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:15,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 303 transitions, 4599 flow. Second operand has 16 states, 16 states have (on average 61.75) internal successors, (988), 16 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:15,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:15,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:15,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:15,853 INFO L124 PetriNetUnfolderBase]: 841/1502 cut-off events. [2023-08-26 16:59:15,853 INFO L125 PetriNetUnfolderBase]: For 22983/22983 co-relation queries the response was YES. [2023-08-26 16:59:15,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12087 conditions, 1502 events. 841/1502 cut-off events. For 22983/22983 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8180 event pairs, 77 based on Foata normal form. 16/1518 useless extension candidates. Maximal degree in co-relation 12017. Up to 557 conditions per place. [2023-08-26 16:59:15,874 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 223 selfloop transitions, 166 changer transitions 0/389 dead transitions. [2023-08-26 16:59:15,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 389 transitions, 6367 flow [2023-08-26 16:59:15,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 16:59:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 16:59:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1232 transitions. [2023-08-26 16:59:15,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41300703989272547 [2023-08-26 16:59:15,877 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1232 transitions. [2023-08-26 16:59:15,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1232 transitions. [2023-08-26 16:59:15,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:15,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1232 transitions. [2023-08-26 16:59:15,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.84210526315789) internal successors, (1232), 19 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:15,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 157.0) internal successors, (3140), 20 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:15,882 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 157.0) internal successors, (3140), 20 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:15,882 INFO L175 Difference]: Start difference. First operand has 171 places, 303 transitions, 4599 flow. Second operand 19 states and 1232 transitions. [2023-08-26 16:59:15,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 389 transitions, 6367 flow [2023-08-26 16:59:16,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 389 transitions, 6232 flow, removed 59 selfloop flow, removed 3 redundant places. [2023-08-26 16:59:16,007 INFO L231 Difference]: Finished difference. Result has 194 places, 342 transitions, 5647 flow [2023-08-26 16:59:16,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4498, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5647, PETRI_PLACES=194, PETRI_TRANSITIONS=342} [2023-08-26 16:59:16,007 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 166 predicate places. [2023-08-26 16:59:16,008 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 342 transitions, 5647 flow [2023-08-26 16:59:16,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.75) internal successors, (988), 16 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:16,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:16,008 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:16,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:16,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:16,213 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:16,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:16,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1350045991, now seen corresponding path program 12 times [2023-08-26 16:59:16,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:16,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400629446] [2023-08-26 16:59:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:16,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:16,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:16,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400629446] [2023-08-26 16:59:16,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400629446] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:16,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455254602] [2023-08-26 16:59:16,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:59:16,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:16,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:16,297 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:16,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-26 16:59:16,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 16:59:16,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:16,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 16:59:16,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:16,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:16,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455254602] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:16,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:16,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-26 16:59:16,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088776413] [2023-08-26 16:59:16,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:16,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 16:59:16,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:16,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 16:59:16,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-08-26 16:59:16,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:16,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 342 transitions, 5647 flow. Second operand has 15 states, 15 states have (on average 61.8) internal successors, (927), 15 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:16,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:16,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:16,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:17,100 INFO L124 PetriNetUnfolderBase]: 979/1708 cut-off events. [2023-08-26 16:59:17,100 INFO L125 PetriNetUnfolderBase]: For 31097/31097 co-relation queries the response was YES. [2023-08-26 16:59:17,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15109 conditions, 1708 events. 979/1708 cut-off events. For 31097/31097 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 9401 event pairs, 129 based on Foata normal form. 18/1726 useless extension candidates. Maximal degree in co-relation 15031. Up to 885 conditions per place. [2023-08-26 16:59:17,123 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 174 selfloop transitions, 257 changer transitions 7/438 dead transitions. [2023-08-26 16:59:17,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 438 transitions, 8208 flow [2023-08-26 16:59:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 16:59:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 16:59:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1227 transitions. [2023-08-26 16:59:17,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4113308749580959 [2023-08-26 16:59:17,126 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1227 transitions. [2023-08-26 16:59:17,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1227 transitions. [2023-08-26 16:59:17,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:17,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1227 transitions. [2023-08-26 16:59:17,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.57894736842105) internal successors, (1227), 19 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:17,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 157.0) internal successors, (3140), 20 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:17,132 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 157.0) internal successors, (3140), 20 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:17,132 INFO L175 Difference]: Start difference. First operand has 194 places, 342 transitions, 5647 flow. Second operand 19 states and 1227 transitions. [2023-08-26 16:59:17,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 438 transitions, 8208 flow [2023-08-26 16:59:17,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 438 transitions, 7955 flow, removed 102 selfloop flow, removed 5 redundant places. [2023-08-26 16:59:17,260 INFO L231 Difference]: Finished difference. Result has 213 places, 399 transitions, 7382 flow [2023-08-26 16:59:17,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=5446, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7382, PETRI_PLACES=213, PETRI_TRANSITIONS=399} [2023-08-26 16:59:17,260 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 185 predicate places. [2023-08-26 16:59:17,261 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 399 transitions, 7382 flow [2023-08-26 16:59:17,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.8) internal successors, (927), 15 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:17,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:17,261 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:17,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:17,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:17,462 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:17,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:17,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1239635831, now seen corresponding path program 13 times [2023-08-26 16:59:17,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:17,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219358822] [2023-08-26 16:59:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:17,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:17,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:17,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219358822] [2023-08-26 16:59:17,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219358822] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:17,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894592272] [2023-08-26 16:59:17,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 16:59:17,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:17,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:17,565 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:17,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-26 16:59:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:17,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 16:59:17,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:17,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:17,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894592272] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:17,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:17,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-26 16:59:17,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297047632] [2023-08-26 16:59:17,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:17,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 16:59:17,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:17,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 16:59:17,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-26 16:59:17,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:17,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 399 transitions, 7382 flow. Second operand has 15 states, 15 states have (on average 62.06666666666667) internal successors, (931), 15 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:17,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:17,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:17,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:18,446 INFO L124 PetriNetUnfolderBase]: 1070/1885 cut-off events. [2023-08-26 16:59:18,446 INFO L125 PetriNetUnfolderBase]: For 41676/41676 co-relation queries the response was YES. [2023-08-26 16:59:18,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17622 conditions, 1885 events. 1070/1885 cut-off events. For 41676/41676 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10551 event pairs, 67 based on Foata normal form. 36/1921 useless extension candidates. Maximal degree in co-relation 17537. Up to 513 conditions per place. [2023-08-26 16:59:18,470 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 216 selfloop transitions, 266 changer transitions 6/488 dead transitions. [2023-08-26 16:59:18,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 488 transitions, 9580 flow [2023-08-26 16:59:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-26 16:59:18,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-26 16:59:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1361 transitions. [2023-08-26 16:59:18,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41279951471034276 [2023-08-26 16:59:18,473 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1361 transitions. [2023-08-26 16:59:18,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1361 transitions. [2023-08-26 16:59:18,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:18,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1361 transitions. [2023-08-26 16:59:18,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 64.80952380952381) internal successors, (1361), 21 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:18,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 157.0) internal successors, (3454), 22 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:18,480 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 157.0) internal successors, (3454), 22 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:18,480 INFO L175 Difference]: Start difference. First operand has 213 places, 399 transitions, 7382 flow. Second operand 21 states and 1361 transitions. [2023-08-26 16:59:18,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 488 transitions, 9580 flow [2023-08-26 16:59:18,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 488 transitions, 8390 flow, removed 357 selfloop flow, removed 14 redundant places. [2023-08-26 16:59:18,720 INFO L231 Difference]: Finished difference. Result has 227 places, 437 transitions, 7803 flow [2023-08-26 16:59:18,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7803, PETRI_PLACES=227, PETRI_TRANSITIONS=437} [2023-08-26 16:59:18,720 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 199 predicate places. [2023-08-26 16:59:18,720 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 437 transitions, 7803 flow [2023-08-26 16:59:18,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.06666666666667) internal successors, (931), 15 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:18,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:18,721 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:18,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:18,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-26 16:59:18,922 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:18,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:18,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1368480017, now seen corresponding path program 14 times [2023-08-26 16:59:18,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:18,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233901625] [2023-08-26 16:59:18,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:18,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:19,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:19,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233901625] [2023-08-26 16:59:19,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233901625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:19,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962727561] [2023-08-26 16:59:19,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:59:19,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:19,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:19,004 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:19,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-26 16:59:19,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:19,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:19,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 16:59:19,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:19,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:19,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962727561] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:19,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:19,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-26 16:59:19,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083347969] [2023-08-26 16:59:19,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:19,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 16:59:19,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:19,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 16:59:19,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-08-26 16:59:19,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:19,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 437 transitions, 7803 flow. Second operand has 15 states, 15 states have (on average 61.8) internal successors, (927), 15 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:19,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:19,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:19,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:19,909 INFO L124 PetriNetUnfolderBase]: 1082/1949 cut-off events. [2023-08-26 16:59:19,909 INFO L125 PetriNetUnfolderBase]: For 46881/46881 co-relation queries the response was YES. [2023-08-26 16:59:19,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17515 conditions, 1949 events. 1082/1949 cut-off events. For 46881/46881 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 11349 event pairs, 78 based on Foata normal form. 38/1987 useless extension candidates. Maximal degree in co-relation 17429. Up to 706 conditions per place. [2023-08-26 16:59:19,933 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 143 selfloop transitions, 348 changer transitions 1/492 dead transitions. [2023-08-26 16:59:19,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 492 transitions, 9436 flow [2023-08-26 16:59:19,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 16:59:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 16:59:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1550 transitions. [2023-08-26 16:59:19,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4113588110403397 [2023-08-26 16:59:19,936 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1550 transitions. [2023-08-26 16:59:19,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1550 transitions. [2023-08-26 16:59:19,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:19,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1550 transitions. [2023-08-26 16:59:19,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 64.58333333333333) internal successors, (1550), 24 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:19,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 157.0) internal successors, (3925), 25 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:19,944 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 157.0) internal successors, (3925), 25 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:19,944 INFO L175 Difference]: Start difference. First operand has 227 places, 437 transitions, 7803 flow. Second operand 24 states and 1550 transitions. [2023-08-26 16:59:19,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 492 transitions, 9436 flow [2023-08-26 16:59:20,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 492 transitions, 9097 flow, removed 95 selfloop flow, removed 13 redundant places. [2023-08-26 16:59:20,187 INFO L231 Difference]: Finished difference. Result has 238 places, 450 transitions, 8570 flow [2023-08-26 16:59:20,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=7438, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8570, PETRI_PLACES=238, PETRI_TRANSITIONS=450} [2023-08-26 16:59:20,188 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 210 predicate places. [2023-08-26 16:59:20,188 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 450 transitions, 8570 flow [2023-08-26 16:59:20,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.8) internal successors, (927), 15 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:20,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:20,189 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:20,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:20,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 16:59:20,389 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:20,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:20,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1110565939, now seen corresponding path program 15 times [2023-08-26 16:59:20,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:20,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442432575] [2023-08-26 16:59:20,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:20,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:20,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:20,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442432575] [2023-08-26 16:59:20,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442432575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:20,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532792636] [2023-08-26 16:59:20,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:59:20,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:20,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:20,485 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:20,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-26 16:59:20,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 16:59:20,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:20,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 16:59:20,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:20,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:20,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532792636] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:20,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:20,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-08-26 16:59:20,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179372935] [2023-08-26 16:59:20,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:20,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 16:59:20,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 16:59:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-26 16:59:20,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:20,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 450 transitions, 8570 flow. Second operand has 15 states, 15 states have (on average 62.13333333333333) internal successors, (932), 15 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:20,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:20,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:20,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:21,573 INFO L124 PetriNetUnfolderBase]: 1463/2612 cut-off events. [2023-08-26 16:59:21,573 INFO L125 PetriNetUnfolderBase]: For 59700/59700 co-relation queries the response was YES. [2023-08-26 16:59:21,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24727 conditions, 2612 events. 1463/2612 cut-off events. For 59700/59700 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 16114 event pairs, 63 based on Foata normal form. 34/2646 useless extension candidates. Maximal degree in co-relation 24641. Up to 697 conditions per place. [2023-08-26 16:59:21,608 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 171 selfloop transitions, 486 changer transitions 7/664 dead transitions. [2023-08-26 16:59:21,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 664 transitions, 13798 flow [2023-08-26 16:59:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-26 16:59:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-26 16:59:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1675 transitions. [2023-08-26 16:59:21,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41033806957373836 [2023-08-26 16:59:21,611 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1675 transitions. [2023-08-26 16:59:21,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1675 transitions. [2023-08-26 16:59:21,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:21,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1675 transitions. [2023-08-26 16:59:21,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 64.42307692307692) internal successors, (1675), 26 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:21,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 157.0) internal successors, (4239), 27 states have internal predecessors, (4239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:21,623 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 157.0) internal successors, (4239), 27 states have internal predecessors, (4239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:21,623 INFO L175 Difference]: Start difference. First operand has 238 places, 450 transitions, 8570 flow. Second operand 26 states and 1675 transitions. [2023-08-26 16:59:21,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 664 transitions, 13798 flow [2023-08-26 16:59:22,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 664 transitions, 12942 flow, removed 126 selfloop flow, removed 20 redundant places. [2023-08-26 16:59:22,033 INFO L231 Difference]: Finished difference. Result has 253 places, 612 transitions, 12698 flow [2023-08-26 16:59:22,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=8040, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12698, PETRI_PLACES=253, PETRI_TRANSITIONS=612} [2023-08-26 16:59:22,034 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 225 predicate places. [2023-08-26 16:59:22,034 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 612 transitions, 12698 flow [2023-08-26 16:59:22,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.13333333333333) internal successors, (932), 15 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:22,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:22,035 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:22,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:22,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 16:59:22,240 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:22,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:22,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1328298559, now seen corresponding path program 16 times [2023-08-26 16:59:22,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:22,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962467931] [2023-08-26 16:59:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:22,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:22,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:22,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962467931] [2023-08-26 16:59:22,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962467931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:22,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416565679] [2023-08-26 16:59:22,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:59:22,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:22,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:22,321 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:22,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-26 16:59:22,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:59:22,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:22,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 16:59:22,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:22,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:22,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416565679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:22,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:22,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-26 16:59:22,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091461247] [2023-08-26 16:59:22,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:22,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 16:59:22,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:22,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 16:59:22,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-26 16:59:22,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:22,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 612 transitions, 12698 flow. Second operand has 18 states, 18 states have (on average 61.94444444444444) internal successors, (1115), 18 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:22,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:22,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:22,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:23,500 INFO L124 PetriNetUnfolderBase]: 1640/2941 cut-off events. [2023-08-26 16:59:23,500 INFO L125 PetriNetUnfolderBase]: For 75644/75644 co-relation queries the response was YES. [2023-08-26 16:59:23,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29850 conditions, 2941 events. 1640/2941 cut-off events. For 75644/75644 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 18789 event pairs, 142 based on Foata normal form. 10/2951 useless extension candidates. Maximal degree in co-relation 29755. Up to 1030 conditions per place. [2023-08-26 16:59:23,530 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 383 selfloop transitions, 369 changer transitions 2/754 dead transitions. [2023-08-26 16:59:23,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 754 transitions, 16642 flow [2023-08-26 16:59:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-26 16:59:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-26 16:59:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1869 transitions. [2023-08-26 16:59:23,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41049857236986603 [2023-08-26 16:59:23,534 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1869 transitions. [2023-08-26 16:59:23,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1869 transitions. [2023-08-26 16:59:23,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:23,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1869 transitions. [2023-08-26 16:59:23,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 64.44827586206897) internal successors, (1869), 29 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:23,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 157.0) internal successors, (4710), 30 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:23,542 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 157.0) internal successors, (4710), 30 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:23,542 INFO L175 Difference]: Start difference. First operand has 253 places, 612 transitions, 12698 flow. Second operand 29 states and 1869 transitions. [2023-08-26 16:59:23,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 754 transitions, 16642 flow [2023-08-26 16:59:24,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 754 transitions, 15952 flow, removed 261 selfloop flow, removed 10 redundant places. [2023-08-26 16:59:24,168 INFO L231 Difference]: Finished difference. Result has 276 places, 693 transitions, 14856 flow [2023-08-26 16:59:24,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=12088, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14856, PETRI_PLACES=276, PETRI_TRANSITIONS=693} [2023-08-26 16:59:24,173 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 248 predicate places. [2023-08-26 16:59:24,174 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 693 transitions, 14856 flow [2023-08-26 16:59:24,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.94444444444444) internal successors, (1115), 18 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:24,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:24,174 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:24,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:24,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:24,379 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:24,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:24,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1223804001, now seen corresponding path program 17 times [2023-08-26 16:59:24,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:24,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867520884] [2023-08-26 16:59:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:24,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:24,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:24,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867520884] [2023-08-26 16:59:24,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867520884] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:24,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675814460] [2023-08-26 16:59:24,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:59:24,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:24,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:24,469 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:24,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-26 16:59:24,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 16:59:24,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:24,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 16:59:24,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:24,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:24,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675814460] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:24,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:24,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-26 16:59:24,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853277298] [2023-08-26 16:59:24,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:24,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 16:59:24,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:24,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 16:59:24,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-08-26 16:59:24,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:24,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 693 transitions, 14856 flow. Second operand has 20 states, 20 states have (on average 61.9) internal successors, (1238), 20 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:24,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:24,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:24,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:26,327 INFO L124 PetriNetUnfolderBase]: 2423/4340 cut-off events. [2023-08-26 16:59:26,327 INFO L125 PetriNetUnfolderBase]: For 118910/118910 co-relation queries the response was YES. [2023-08-26 16:59:26,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45039 conditions, 4340 events. 2423/4340 cut-off events. For 118910/118910 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 29760 event pairs, 141 based on Foata normal form. 32/4372 useless extension candidates. Maximal degree in co-relation 44939. Up to 1189 conditions per place. [2023-08-26 16:59:26,365 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 331 selfloop transitions, 753 changer transitions 10/1094 dead transitions. [2023-08-26 16:59:26,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1094 transitions, 25468 flow [2023-08-26 16:59:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-26 16:59:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-26 16:59:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2317 transitions. [2023-08-26 16:59:26,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40994338287331916 [2023-08-26 16:59:26,369 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2317 transitions. [2023-08-26 16:59:26,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2317 transitions. [2023-08-26 16:59:26,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:26,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2317 transitions. [2023-08-26 16:59:26,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 64.36111111111111) internal successors, (2317), 36 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:26,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 157.0) internal successors, (5809), 37 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:26,379 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 157.0) internal successors, (5809), 37 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:26,379 INFO L175 Difference]: Start difference. First operand has 276 places, 693 transitions, 14856 flow. Second operand 36 states and 2317 transitions. [2023-08-26 16:59:26,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1094 transitions, 25468 flow [2023-08-26 16:59:27,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1094 transitions, 24875 flow, removed 248 selfloop flow, removed 6 redundant places. [2023-08-26 16:59:27,195 INFO L231 Difference]: Finished difference. Result has 317 places, 1021 transitions, 24724 flow [2023-08-26 16:59:27,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=14529, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=24724, PETRI_PLACES=317, PETRI_TRANSITIONS=1021} [2023-08-26 16:59:27,197 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 289 predicate places. [2023-08-26 16:59:27,197 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 1021 transitions, 24724 flow [2023-08-26 16:59:27,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.9) internal successors, (1238), 20 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:27,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:27,197 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:27,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:27,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-26 16:59:27,403 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:27,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:27,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1794367103, now seen corresponding path program 18 times [2023-08-26 16:59:27,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:27,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387868636] [2023-08-26 16:59:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:27,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:27,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:27,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387868636] [2023-08-26 16:59:27,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387868636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:27,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369356444] [2023-08-26 16:59:27,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:59:27,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:27,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:27,494 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:27,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-26 16:59:27,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 16:59:27,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:27,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 16:59:27,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:27,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:27,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369356444] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:27,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:27,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-26 16:59:27,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557082541] [2023-08-26 16:59:27,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:27,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 16:59:27,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:27,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 16:59:27,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-08-26 16:59:27,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:27,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 1021 transitions, 24724 flow. Second operand has 20 states, 20 states have (on average 61.6) internal successors, (1232), 20 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:27,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:27,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:27,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:29,466 INFO L124 PetriNetUnfolderBase]: 2490/4449 cut-off events. [2023-08-26 16:59:29,466 INFO L125 PetriNetUnfolderBase]: For 148572/148572 co-relation queries the response was YES. [2023-08-26 16:59:29,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49966 conditions, 4449 events. 2490/4449 cut-off events. For 148572/148572 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 30260 event pairs, 685 based on Foata normal form. 60/4509 useless extension candidates. Maximal degree in co-relation 49853. Up to 3951 conditions per place. [2023-08-26 16:59:29,507 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 984 selfloop transitions, 141 changer transitions 11/1136 dead transitions. [2023-08-26 16:59:29,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1136 transitions, 29212 flow [2023-08-26 16:59:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-26 16:59:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-26 16:59:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1942 transitions. [2023-08-26 16:59:29,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123142250530786 [2023-08-26 16:59:29,509 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1942 transitions. [2023-08-26 16:59:29,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1942 transitions. [2023-08-26 16:59:29,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:29,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1942 transitions. [2023-08-26 16:59:29,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.73333333333333) internal successors, (1942), 30 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:29,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 157.0) internal successors, (4867), 31 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:29,517 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 157.0) internal successors, (4867), 31 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:29,517 INFO L175 Difference]: Start difference. First operand has 317 places, 1021 transitions, 24724 flow. Second operand 30 states and 1942 transitions. [2023-08-26 16:59:29,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1136 transitions, 29212 flow [2023-08-26 16:59:30,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1136 transitions, 28612 flow, removed 254 selfloop flow, removed 10 redundant places. [2023-08-26 16:59:30,806 INFO L231 Difference]: Finished difference. Result has 353 places, 1077 transitions, 26486 flow [2023-08-26 16:59:30,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=24138, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=926, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=26486, PETRI_PLACES=353, PETRI_TRANSITIONS=1077} [2023-08-26 16:59:30,807 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 325 predicate places. [2023-08-26 16:59:30,807 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1077 transitions, 26486 flow [2023-08-26 16:59:30,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.6) internal successors, (1232), 20 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:30,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:30,807 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:30,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:31,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:31,013 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:31,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:31,013 INFO L85 PathProgramCache]: Analyzing trace with hash 638535959, now seen corresponding path program 19 times [2023-08-26 16:59:31,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:31,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94043340] [2023-08-26 16:59:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:31,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:31,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:31,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94043340] [2023-08-26 16:59:31,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94043340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:31,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141693578] [2023-08-26 16:59:31,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 16:59:31,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:31,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:31,093 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:31,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-26 16:59:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:31,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 16:59:31,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:31,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:31,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141693578] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:31,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:31,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-26 16:59:31,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077013712] [2023-08-26 16:59:31,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:31,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 16:59:31,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:31,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 16:59:31,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-08-26 16:59:31,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:31,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1077 transitions, 26486 flow. Second operand has 17 states, 17 states have (on average 61.8235294117647) internal successors, (1051), 17 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:31,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:31,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:31,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:33,015 INFO L124 PetriNetUnfolderBase]: 2496/4434 cut-off events. [2023-08-26 16:59:33,016 INFO L125 PetriNetUnfolderBase]: For 143525/143525 co-relation queries the response was YES. [2023-08-26 16:59:33,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49228 conditions, 4434 events. 2496/4434 cut-off events. For 143525/143525 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 29936 event pairs, 712 based on Foata normal form. 6/4440 useless extension candidates. Maximal degree in co-relation 49097. Up to 4069 conditions per place. [2023-08-26 16:59:33,062 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 975 selfloop transitions, 135 changer transitions 5/1115 dead transitions. [2023-08-26 16:59:33,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1115 transitions, 29329 flow [2023-08-26 16:59:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 16:59:33,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 16:59:33,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1030 transitions. [2023-08-26 16:59:33,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41003184713375795 [2023-08-26 16:59:33,064 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1030 transitions. [2023-08-26 16:59:33,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1030 transitions. [2023-08-26 16:59:33,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:33,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1030 transitions. [2023-08-26 16:59:33,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 64.375) internal successors, (1030), 16 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:33,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 157.0) internal successors, (2669), 17 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:33,069 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 157.0) internal successors, (2669), 17 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:33,069 INFO L175 Difference]: Start difference. First operand has 353 places, 1077 transitions, 26486 flow. Second operand 16 states and 1030 transitions. [2023-08-26 16:59:33,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1115 transitions, 29329 flow [2023-08-26 16:59:34,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1115 transitions, 27754 flow, removed 764 selfloop flow, removed 6 redundant places. [2023-08-26 16:59:34,475 INFO L231 Difference]: Finished difference. Result has 362 places, 1090 transitions, 25618 flow [2023-08-26 16:59:34,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=25035, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=25618, PETRI_PLACES=362, PETRI_TRANSITIONS=1090} [2023-08-26 16:59:34,476 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 334 predicate places. [2023-08-26 16:59:34,476 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 1090 transitions, 25618 flow [2023-08-26 16:59:34,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.8235294117647) internal successors, (1051), 17 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:34,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:34,477 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:34,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:34,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:34,682 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:34,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:34,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1816280181, now seen corresponding path program 20 times [2023-08-26 16:59:34,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:34,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962366495] [2023-08-26 16:59:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:34,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:34,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:34,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962366495] [2023-08-26 16:59:34,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962366495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:34,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381680489] [2023-08-26 16:59:34,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:59:34,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:34,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:34,781 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:34,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-26 16:59:34,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:59:34,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:34,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-26 16:59:34,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:34,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:59:34,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381680489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:34,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:34,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-26 16:59:34,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484769393] [2023-08-26 16:59:34,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:34,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 16:59:34,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:34,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 16:59:34,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 16:59:34,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 157 [2023-08-26 16:59:34,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1090 transitions, 25618 flow. Second operand has 6 states, 6 states have (on average 74.83333333333333) internal successors, (449), 6 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:34,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:34,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 157 [2023-08-26 16:59:34,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:37,033 INFO L124 PetriNetUnfolderBase]: 3355/5920 cut-off events. [2023-08-26 16:59:37,033 INFO L125 PetriNetUnfolderBase]: For 164004/164014 co-relation queries the response was YES. [2023-08-26 16:59:37,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62827 conditions, 5920 events. 3355/5920 cut-off events. For 164004/164014 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 42056 event pairs, 147 based on Foata normal form. 15/5932 useless extension candidates. Maximal degree in co-relation 62694. Up to 3546 conditions per place. [2023-08-26 16:59:37,127 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 994 selfloop transitions, 448 changer transitions 133/1583 dead transitions. [2023-08-26 16:59:37,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1583 transitions, 39744 flow [2023-08-26 16:59:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 16:59:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 16:59:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 489 transitions. [2023-08-26 16:59:37,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5191082802547771 [2023-08-26 16:59:37,128 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 489 transitions. [2023-08-26 16:59:37,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 489 transitions. [2023-08-26 16:59:37,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:37,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 489 transitions. [2023-08-26 16:59:37,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.5) internal successors, (489), 6 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:37,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:37,131 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:37,131 INFO L175 Difference]: Start difference. First operand has 362 places, 1090 transitions, 25618 flow. Second operand 6 states and 489 transitions. [2023-08-26 16:59:37,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1583 transitions, 39744 flow [2023-08-26 16:59:39,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1583 transitions, 39420 flow, removed 70 selfloop flow, removed 9 redundant places. [2023-08-26 16:59:39,186 INFO L231 Difference]: Finished difference. Result has 361 places, 1320 transitions, 31526 flow [2023-08-26 16:59:39,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=25418, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=31526, PETRI_PLACES=361, PETRI_TRANSITIONS=1320} [2023-08-26 16:59:39,188 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 333 predicate places. [2023-08-26 16:59:39,188 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 1320 transitions, 31526 flow [2023-08-26 16:59:39,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.83333333333333) internal successors, (449), 6 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:39,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:39,188 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:39,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:39,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:39,393 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:39,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:39,394 INFO L85 PathProgramCache]: Analyzing trace with hash 531158984, now seen corresponding path program 21 times [2023-08-26 16:59:39,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:39,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337755473] [2023-08-26 16:59:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:39,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:39,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:39,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337755473] [2023-08-26 16:59:39,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337755473] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:39,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265733204] [2023-08-26 16:59:39,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:59:39,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:39,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:39,496 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:39,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-26 16:59:39,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-26 16:59:39,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:39,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 16:59:39,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:39,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:39,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265733204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:39,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:39,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-08-26 16:59:39,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147022937] [2023-08-26 16:59:39,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:39,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 16:59:39,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:39,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 16:59:39,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-08-26 16:59:39,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:39,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1320 transitions, 31526 flow. Second operand has 17 states, 17 states have (on average 61.88235294117647) internal successors, (1052), 17 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:39,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:39,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:39,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:42,807 INFO L124 PetriNetUnfolderBase]: 4014/7171 cut-off events. [2023-08-26 16:59:42,808 INFO L125 PetriNetUnfolderBase]: For 214687/214687 co-relation queries the response was YES. [2023-08-26 16:59:42,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80293 conditions, 7171 events. 4014/7171 cut-off events. For 214687/214687 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 52855 event pairs, 155 based on Foata normal form. 16/7187 useless extension candidates. Maximal degree in co-relation 80158. Up to 3288 conditions per place. [2023-08-26 16:59:42,891 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 1092 selfloop transitions, 639 changer transitions 33/1764 dead transitions. [2023-08-26 16:59:42,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1764 transitions, 45952 flow [2023-08-26 16:59:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 16:59:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 16:59:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1049 transitions. [2023-08-26 16:59:42,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41759554140127386 [2023-08-26 16:59:42,893 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1049 transitions. [2023-08-26 16:59:42,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1049 transitions. [2023-08-26 16:59:42,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:42,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1049 transitions. [2023-08-26 16:59:42,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.5625) internal successors, (1049), 16 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:42,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 157.0) internal successors, (2669), 17 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:42,897 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 157.0) internal successors, (2669), 17 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:42,897 INFO L175 Difference]: Start difference. First operand has 361 places, 1320 transitions, 31526 flow. Second operand 16 states and 1049 transitions. [2023-08-26 16:59:42,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1764 transitions, 45952 flow [2023-08-26 16:59:45,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1764 transitions, 45474 flow, removed 239 selfloop flow, removed 0 redundant places. [2023-08-26 16:59:45,507 INFO L231 Difference]: Finished difference. Result has 386 places, 1631 transitions, 42340 flow [2023-08-26 16:59:45,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=31102, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=42340, PETRI_PLACES=386, PETRI_TRANSITIONS=1631} [2023-08-26 16:59:45,509 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 358 predicate places. [2023-08-26 16:59:45,509 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1631 transitions, 42340 flow [2023-08-26 16:59:45,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.88235294117647) internal successors, (1052), 17 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:45,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:45,510 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:45,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-26 16:59:45,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:45,714 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:45,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash 963451552, now seen corresponding path program 22 times [2023-08-26 16:59:45,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:45,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975602487] [2023-08-26 16:59:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:45,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:45,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:45,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975602487] [2023-08-26 16:59:45,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975602487] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:45,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910986678] [2023-08-26 16:59:45,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:59:45,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:45,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:45,817 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:45,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-26 16:59:45,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:59:45,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:45,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 16:59:45,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:45,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:46,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910986678] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:46,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:46,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-08-26 16:59:46,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077198134] [2023-08-26 16:59:46,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:46,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 16:59:46,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:46,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 16:59:46,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-08-26 16:59:46,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:46,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1631 transitions, 42340 flow. Second operand has 19 states, 19 states have (on average 61.63157894736842) internal successors, (1171), 19 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:46,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:46,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:46,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:49,950 INFO L124 PetriNetUnfolderBase]: 4415/7816 cut-off events. [2023-08-26 16:59:49,950 INFO L125 PetriNetUnfolderBase]: For 267310/267310 co-relation queries the response was YES. [2023-08-26 16:59:50,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91709 conditions, 7816 events. 4415/7816 cut-off events. For 267310/267310 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 57969 event pairs, 446 based on Foata normal form. 22/7838 useless extension candidates. Maximal degree in co-relation 91563. Up to 3120 conditions per place. [2023-08-26 16:59:50,040 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 1083 selfloop transitions, 827 changer transitions 2/1912 dead transitions. [2023-08-26 16:59:50,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1912 transitions, 52630 flow [2023-08-26 16:59:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 16:59:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 16:59:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1555 transitions. [2023-08-26 16:59:50,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41268577494692144 [2023-08-26 16:59:50,042 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1555 transitions. [2023-08-26 16:59:50,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1555 transitions. [2023-08-26 16:59:50,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:50,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1555 transitions. [2023-08-26 16:59:50,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 64.79166666666667) internal successors, (1555), 24 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:50,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 157.0) internal successors, (3925), 25 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:50,048 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 157.0) internal successors, (3925), 25 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:50,048 INFO L175 Difference]: Start difference. First operand has 386 places, 1631 transitions, 42340 flow. Second operand 24 states and 1555 transitions. [2023-08-26 16:59:50,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1912 transitions, 52630 flow [2023-08-26 16:59:53,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1912 transitions, 52231 flow, removed 178 selfloop flow, removed 4 redundant places. [2023-08-26 16:59:53,570 INFO L231 Difference]: Finished difference. Result has 413 places, 1802 transitions, 49338 flow [2023-08-26 16:59:53,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=42005, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=49338, PETRI_PLACES=413, PETRI_TRANSITIONS=1802} [2023-08-26 16:59:53,571 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 385 predicate places. [2023-08-26 16:59:53,571 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 1802 transitions, 49338 flow [2023-08-26 16:59:53,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 61.63157894736842) internal successors, (1171), 19 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:53,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:59:53,572 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:59:53,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-26 16:59:53,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-26 16:59:53,772 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 16:59:53,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:59:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1117783940, now seen corresponding path program 23 times [2023-08-26 16:59:53,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:59:53,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709319189] [2023-08-26 16:59:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:59:53,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:59:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:59:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:53,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:59:53,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709319189] [2023-08-26 16:59:53,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709319189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:59:53,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138939828] [2023-08-26 16:59:53,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:59:53,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:59:53,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:59:53,884 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:59:53,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-26 16:59:53,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 16:59:53,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:59:53,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 16:59:53,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:59:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:54,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:59:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:59:54,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138939828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:59:54,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:59:54,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-26 16:59:54,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590574122] [2023-08-26 16:59:54,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:59:54,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 16:59:54,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:59:54,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 16:59:54,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-08-26 16:59:54,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 16:59:54,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 1802 transitions, 49338 flow. Second operand has 18 states, 18 states have (on average 61.666666666666664) internal successors, (1110), 18 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:54,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:59:54,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 16:59:54,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:59:58,874 INFO L124 PetriNetUnfolderBase]: 4777/8458 cut-off events. [2023-08-26 16:59:58,875 INFO L125 PetriNetUnfolderBase]: For 338721/338721 co-relation queries the response was YES. [2023-08-26 16:59:58,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103097 conditions, 8458 events. 4777/8458 cut-off events. For 338721/338721 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 63457 event pairs, 260 based on Foata normal form. 60/8518 useless extension candidates. Maximal degree in co-relation 102943. Up to 3080 conditions per place. [2023-08-26 16:59:58,971 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 431 selfloop transitions, 1624 changer transitions 32/2087 dead transitions. [2023-08-26 16:59:58,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 2087 transitions, 60575 flow [2023-08-26 16:59:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-26 16:59:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-26 16:59:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2383 transitions. [2023-08-26 16:59:58,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4102255121363402 [2023-08-26 16:59:58,974 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2383 transitions. [2023-08-26 16:59:58,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2383 transitions. [2023-08-26 16:59:58,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:59:58,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2383 transitions. [2023-08-26 16:59:58,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.4054054054054) internal successors, (2383), 37 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:58,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 157.0) internal successors, (5966), 38 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:58,981 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 157.0) internal successors, (5966), 38 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:59:58,981 INFO L175 Difference]: Start difference. First operand has 413 places, 1802 transitions, 49338 flow. Second operand 37 states and 2383 transitions. [2023-08-26 16:59:58,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 2087 transitions, 60575 flow [2023-08-26 17:00:03,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 2087 transitions, 59640 flow, removed 431 selfloop flow, removed 5 redundant places. [2023-08-26 17:00:03,370 INFO L231 Difference]: Finished difference. Result has 447 places, 1988 transitions, 58016 flow [2023-08-26 17:00:03,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=48591, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=58016, PETRI_PLACES=447, PETRI_TRANSITIONS=1988} [2023-08-26 17:00:03,372 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 419 predicate places. [2023-08-26 17:00:03,372 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 1988 transitions, 58016 flow [2023-08-26 17:00:03,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.666666666666664) internal successors, (1110), 18 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:03,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:00:03,372 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:00:03,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-26 17:00:03,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-26 17:00:03,573 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:00:03,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:00:03,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1136217966, now seen corresponding path program 24 times [2023-08-26 17:00:03,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:00:03,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950476386] [2023-08-26 17:00:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:00:03,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:00:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:00:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:03,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:00:03,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950476386] [2023-08-26 17:00:03,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950476386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:00:03,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731080847] [2023-08-26 17:00:03,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 17:00:03,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:00:03,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:00:03,713 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:00:03,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-26 17:00:03,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-26 17:00:03,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:00:03,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:00:03,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:00:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:03,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:00:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:03,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731080847] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:00:03,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:00:03,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-26 17:00:03,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700737719] [2023-08-26 17:00:03,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:00:03,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 17:00:03,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:00:03,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 17:00:03,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-08-26 17:00:03,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:00:03,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 1988 transitions, 58016 flow. Second operand has 18 states, 18 states have (on average 61.666666666666664) internal successors, (1110), 18 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:03,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:00:03,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:00:03,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:00:09,358 INFO L124 PetriNetUnfolderBase]: 4726/8341 cut-off events. [2023-08-26 17:00:09,358 INFO L125 PetriNetUnfolderBase]: For 350742/350742 co-relation queries the response was YES. [2023-08-26 17:00:09,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106537 conditions, 8341 events. 4726/8341 cut-off events. For 350742/350742 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 62835 event pairs, 786 based on Foata normal form. 12/8353 useless extension candidates. Maximal degree in co-relation 106379. Up to 4882 conditions per place. [2023-08-26 17:00:09,467 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 761 selfloop transitions, 1280 changer transitions 2/2043 dead transitions. [2023-08-26 17:00:09,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 2043 transitions, 62580 flow [2023-08-26 17:00:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-26 17:00:09,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-26 17:00:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1798 transitions. [2023-08-26 17:00:09,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40900818926296634 [2023-08-26 17:00:09,470 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1798 transitions. [2023-08-26 17:00:09,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1798 transitions. [2023-08-26 17:00:09,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:00:09,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1798 transitions. [2023-08-26 17:00:09,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 64.21428571428571) internal successors, (1798), 28 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:09,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 157.0) internal successors, (4553), 29 states have internal predecessors, (4553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:09,475 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 157.0) internal successors, (4553), 29 states have internal predecessors, (4553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:09,475 INFO L175 Difference]: Start difference. First operand has 447 places, 1988 transitions, 58016 flow. Second operand 28 states and 1798 transitions. [2023-08-26 17:00:09,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 2043 transitions, 62580 flow [2023-08-26 17:00:14,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 2043 transitions, 58463 flow, removed 1227 selfloop flow, removed 23 redundant places. [2023-08-26 17:00:14,930 INFO L231 Difference]: Finished difference. Result has 453 places, 1988 transitions, 56522 flow [2023-08-26 17:00:14,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=53901, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=56522, PETRI_PLACES=453, PETRI_TRANSITIONS=1988} [2023-08-26 17:00:14,932 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 425 predicate places. [2023-08-26 17:00:14,932 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 1988 transitions, 56522 flow [2023-08-26 17:00:14,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.666666666666664) internal successors, (1110), 18 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:14,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:00:14,933 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:00:14,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-26 17:00:15,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-26 17:00:15,138 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:00:15,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:00:15,139 INFO L85 PathProgramCache]: Analyzing trace with hash 708772548, now seen corresponding path program 25 times [2023-08-26 17:00:15,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:00:15,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113923952] [2023-08-26 17:00:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:00:15,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:00:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:00:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:15,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:00:15,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113923952] [2023-08-26 17:00:15,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113923952] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:00:15,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552146439] [2023-08-26 17:00:15,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 17:00:15,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:00:15,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:00:15,259 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:00:15,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-26 17:00:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:00:15,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:00:15,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:00:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:15,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:00:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:15,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552146439] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:00:15,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:00:15,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-26 17:00:15,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087672406] [2023-08-26 17:00:15,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:00:15,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 17:00:15,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:00:15,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 17:00:15,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-26 17:00:15,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:00:15,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 1988 transitions, 56522 flow. Second operand has 18 states, 18 states have (on average 61.888888888888886) internal successors, (1114), 18 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:15,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:00:15,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:00:15,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:00:20,613 INFO L124 PetriNetUnfolderBase]: 5083/8984 cut-off events. [2023-08-26 17:00:20,613 INFO L125 PetriNetUnfolderBase]: For 305707/305707 co-relation queries the response was YES. [2023-08-26 17:00:20,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110407 conditions, 8984 events. 5083/8984 cut-off events. For 305707/305707 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 67734 event pairs, 329 based on Foata normal form. 22/9006 useless extension candidates. Maximal degree in co-relation 110255. Up to 2551 conditions per place. [2023-08-26 17:00:20,726 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 980 selfloop transitions, 1227 changer transitions 25/2232 dead transitions. [2023-08-26 17:00:20,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 2232 transitions, 66303 flow [2023-08-26 17:00:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-26 17:00:20,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-26 17:00:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1936 transitions. [2023-08-26 17:00:20,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110403397027601 [2023-08-26 17:00:20,729 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1936 transitions. [2023-08-26 17:00:20,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1936 transitions. [2023-08-26 17:00:20,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:00:20,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1936 transitions. [2023-08-26 17:00:20,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.53333333333333) internal successors, (1936), 30 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:20,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 157.0) internal successors, (4867), 31 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:20,734 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 157.0) internal successors, (4867), 31 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:20,734 INFO L175 Difference]: Start difference. First operand has 453 places, 1988 transitions, 56522 flow. Second operand 30 states and 1936 transitions. [2023-08-26 17:00:20,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 2232 transitions, 66303 flow [2023-08-26 17:00:25,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 2232 transitions, 63690 flow, removed 36 selfloop flow, removed 23 redundant places. [2023-08-26 17:00:25,912 INFO L231 Difference]: Finished difference. Result has 467 places, 2104 transitions, 61148 flow [2023-08-26 17:00:25,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=54136, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1096, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=803, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=61148, PETRI_PLACES=467, PETRI_TRANSITIONS=2104} [2023-08-26 17:00:25,913 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 439 predicate places. [2023-08-26 17:00:25,914 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 2104 transitions, 61148 flow [2023-08-26 17:00:25,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.888888888888886) internal successors, (1114), 18 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:25,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:00:25,914 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:00:25,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-26 17:00:26,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:00:26,115 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:00:26,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:00:26,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1246628126, now seen corresponding path program 26 times [2023-08-26 17:00:26,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:00:26,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516938762] [2023-08-26 17:00:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:00:26,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:00:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:00:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:26,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:00:26,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516938762] [2023-08-26 17:00:26,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516938762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:00:26,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970200285] [2023-08-26 17:00:26,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:00:26,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:00:26,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:00:26,213 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:00:26,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-26 17:00:26,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:00:26,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:00:26,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:00:26,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:00:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:26,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:00:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:26,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970200285] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:00:26,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:00:26,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-26 17:00:26,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168575526] [2023-08-26 17:00:26,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:00:26,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 17:00:26,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:00:26,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 17:00:26,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-08-26 17:00:26,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:00:26,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 2104 transitions, 61148 flow. Second operand has 18 states, 18 states have (on average 61.888888888888886) internal successors, (1114), 18 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:26,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:00:26,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:00:26,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:00:32,253 INFO L124 PetriNetUnfolderBase]: 5412/9553 cut-off events. [2023-08-26 17:00:32,253 INFO L125 PetriNetUnfolderBase]: For 349053/349053 co-relation queries the response was YES. [2023-08-26 17:00:32,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119038 conditions, 9553 events. 5412/9553 cut-off events. For 349053/349053 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 72656 event pairs, 251 based on Foata normal form. 52/9605 useless extension candidates. Maximal degree in co-relation 118879. Up to 2781 conditions per place. [2023-08-26 17:00:32,370 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 718 selfloop transitions, 1623 changer transitions 15/2356 dead transitions. [2023-08-26 17:00:32,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 2356 transitions, 70980 flow [2023-08-26 17:00:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-26 17:00:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-26 17:00:32,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2254 transitions. [2023-08-26 17:00:32,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4101910828025478 [2023-08-26 17:00:32,373 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2254 transitions. [2023-08-26 17:00:32,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2254 transitions. [2023-08-26 17:00:32,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:00:32,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2254 transitions. [2023-08-26 17:00:32,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 64.4) internal successors, (2254), 35 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:32,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 157.0) internal successors, (5652), 36 states have internal predecessors, (5652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:32,380 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 157.0) internal successors, (5652), 36 states have internal predecessors, (5652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:32,380 INFO L175 Difference]: Start difference. First operand has 467 places, 2104 transitions, 61148 flow. Second operand 35 states and 2254 transitions. [2023-08-26 17:00:32,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 2356 transitions, 70980 flow [2023-08-26 17:00:38,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 2356 transitions, 69865 flow, removed 430 selfloop flow, removed 10 redundant places. [2023-08-26 17:00:38,287 INFO L231 Difference]: Finished difference. Result has 501 places, 2258 transitions, 69377 flow [2023-08-26 17:00:38,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=60095, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=69377, PETRI_PLACES=501, PETRI_TRANSITIONS=2258} [2023-08-26 17:00:38,288 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 473 predicate places. [2023-08-26 17:00:38,288 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 2258 transitions, 69377 flow [2023-08-26 17:00:38,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.888888888888886) internal successors, (1114), 18 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:38,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:00:38,289 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:00:38,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-26 17:00:38,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-26 17:00:38,489 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:00:38,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:00:38,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2029116180, now seen corresponding path program 27 times [2023-08-26 17:00:38,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:00:38,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660331597] [2023-08-26 17:00:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:00:38,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:00:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:00:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:38,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:00:38,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660331597] [2023-08-26 17:00:38,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660331597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:00:38,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178468330] [2023-08-26 17:00:38,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 17:00:38,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:00:38,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:00:38,607 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:00:38,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-26 17:00:38,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 17:00:38,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:00:38,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:00:38,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:00:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:38,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:00:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:38,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178468330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:00:38,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:00:38,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-08-26 17:00:38,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631259397] [2023-08-26 17:00:38,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:00:38,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 17:00:38,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:00:38,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 17:00:38,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-08-26 17:00:38,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:00:38,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 2258 transitions, 69377 flow. Second operand has 21 states, 21 states have (on average 61.80952380952381) internal successors, (1298), 21 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:38,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:00:38,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:00:38,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:00:46,341 INFO L124 PetriNetUnfolderBase]: 6009/10640 cut-off events. [2023-08-26 17:00:46,341 INFO L125 PetriNetUnfolderBase]: For 429350/429350 co-relation queries the response was YES. [2023-08-26 17:00:46,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139307 conditions, 10640 events. 6009/10640 cut-off events. For 429350/429350 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 83049 event pairs, 469 based on Foata normal form. 12/10652 useless extension candidates. Maximal degree in co-relation 139139. Up to 3469 conditions per place. [2023-08-26 17:00:46,482 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 1303 selfloop transitions, 1341 changer transitions 0/2644 dead transitions. [2023-08-26 17:00:46,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 2644 transitions, 85062 flow [2023-08-26 17:00:46,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-26 17:00:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-26 17:00:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2704 transitions. [2023-08-26 17:00:46,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41006976038823173 [2023-08-26 17:00:46,485 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2704 transitions. [2023-08-26 17:00:46,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2704 transitions. [2023-08-26 17:00:46,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:00:46,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2704 transitions. [2023-08-26 17:00:46,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 64.38095238095238) internal successors, (2704), 42 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:46,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 157.0) internal successors, (6751), 43 states have internal predecessors, (6751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:46,492 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 157.0) internal successors, (6751), 43 states have internal predecessors, (6751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:46,492 INFO L175 Difference]: Start difference. First operand has 501 places, 2258 transitions, 69377 flow. Second operand 42 states and 2704 transitions. [2023-08-26 17:00:46,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 2644 transitions, 85062 flow [2023-08-26 17:00:54,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 2644 transitions, 84031 flow, removed 262 selfloop flow, removed 16 redundant places. [2023-08-26 17:00:54,631 INFO L231 Difference]: Finished difference. Result has 532 places, 2505 transitions, 80360 flow [2023-08-26 17:00:54,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=68501, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1095, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=80360, PETRI_PLACES=532, PETRI_TRANSITIONS=2505} [2023-08-26 17:00:54,632 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 504 predicate places. [2023-08-26 17:00:54,632 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 2505 transitions, 80360 flow [2023-08-26 17:00:54,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.80952380952381) internal successors, (1298), 21 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:54,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:00:54,633 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:00:54,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-26 17:00:54,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-26 17:00:54,834 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:00:54,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:00:54,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1315717044, now seen corresponding path program 28 times [2023-08-26 17:00:54,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:00:54,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834010097] [2023-08-26 17:00:54,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:00:54,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:00:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:00:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:54,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:00:54,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834010097] [2023-08-26 17:00:54,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834010097] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:00:54,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657183039] [2023-08-26 17:00:54,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:00:54,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:00:54,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:00:54,952 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:00:54,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-26 17:00:55,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:00:55,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:00:55,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:00:55,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:00:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:55,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:00:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:00:55,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657183039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:00:55,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:00:55,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2023-08-26 17:00:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415119637] [2023-08-26 17:00:55,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:00:55,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 17:00:55,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:00:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 17:00:55,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-26 17:00:55,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:00:55,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 2505 transitions, 80360 flow. Second operand has 18 states, 18 states have (on average 61.94444444444444) internal successors, (1115), 18 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:00:55,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:00:55,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:00:55,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:01:03,585 INFO L124 PetriNetUnfolderBase]: 6471/11486 cut-off events. [2023-08-26 17:01:03,586 INFO L125 PetriNetUnfolderBase]: For 492112/492112 co-relation queries the response was YES. [2023-08-26 17:01:03,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154399 conditions, 11486 events. 6471/11486 cut-off events. For 492112/492112 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 90760 event pairs, 309 based on Foata normal form. 26/11512 useless extension candidates. Maximal degree in co-relation 154225. Up to 2881 conditions per place. [2023-08-26 17:01:03,768 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 961 selfloop transitions, 1834 changer transitions 16/2811 dead transitions. [2023-08-26 17:01:03,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 2811 transitions, 94063 flow [2023-08-26 17:01:03,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-26 17:01:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-26 17:01:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2191 transitions. [2023-08-26 17:01:03,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41045335331584865 [2023-08-26 17:01:03,772 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2191 transitions. [2023-08-26 17:01:03,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2191 transitions. [2023-08-26 17:01:03,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:01:03,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2191 transitions. [2023-08-26 17:01:03,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 64.44117647058823) internal successors, (2191), 34 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:03,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 157.0) internal successors, (5495), 35 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:03,780 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 157.0) internal successors, (5495), 35 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:03,780 INFO L175 Difference]: Start difference. First operand has 532 places, 2505 transitions, 80360 flow. Second operand 34 states and 2191 transitions. [2023-08-26 17:01:03,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 2811 transitions, 94063 flow [2023-08-26 17:01:14,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 2811 transitions, 93149 flow, removed 390 selfloop flow, removed 8 redundant places. [2023-08-26 17:01:14,201 INFO L231 Difference]: Finished difference. Result has 568 places, 2688 transitions, 91140 flow [2023-08-26 17:01:14,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=79504, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1656, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=786, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=91140, PETRI_PLACES=568, PETRI_TRANSITIONS=2688} [2023-08-26 17:01:14,203 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 540 predicate places. [2023-08-26 17:01:14,203 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 2688 transitions, 91140 flow [2023-08-26 17:01:14,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.94444444444444) internal successors, (1115), 18 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:14,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:01:14,204 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:01:14,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-26 17:01:14,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-26 17:01:14,408 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:01:14,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:01:14,408 INFO L85 PathProgramCache]: Analyzing trace with hash 637152044, now seen corresponding path program 29 times [2023-08-26 17:01:14,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:01:14,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111848008] [2023-08-26 17:01:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:01:14,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:01:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:01:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:01:14,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:01:14,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111848008] [2023-08-26 17:01:14,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111848008] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:01:14,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078325421] [2023-08-26 17:01:14,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 17:01:14,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:01:14,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:01:14,493 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:01:14,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-26 17:01:14,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 17:01:14,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:01:14,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:01:14,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:01:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:01:14,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:01:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:01:14,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078325421] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:01:14,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:01:14,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2023-08-26 17:01:14,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662689378] [2023-08-26 17:01:14,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:01:14,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 17:01:14,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:01:14,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 17:01:14,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-08-26 17:01:14,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:01:14,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 2688 transitions, 91140 flow. Second operand has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:14,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:01:14,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:01:14,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:01:24,677 INFO L124 PetriNetUnfolderBase]: 6771/12066 cut-off events. [2023-08-26 17:01:24,677 INFO L125 PetriNetUnfolderBase]: For 566406/566406 co-relation queries the response was YES. [2023-08-26 17:01:24,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168015 conditions, 12066 events. 6771/12066 cut-off events. For 566406/566406 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 96445 event pairs, 184 based on Foata normal form. 60/12126 useless extension candidates. Maximal degree in co-relation 167829. Up to 2971 conditions per place. [2023-08-26 17:01:24,859 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 475 selfloop transitions, 2418 changer transitions 19/2912 dead transitions. [2023-08-26 17:01:24,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 2912 transitions, 102184 flow [2023-08-26 17:01:24,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-26 17:01:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-26 17:01:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2059 transitions. [2023-08-26 17:01:24,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098328025477707 [2023-08-26 17:01:24,861 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2059 transitions. [2023-08-26 17:01:24,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2059 transitions. [2023-08-26 17:01:24,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:01:24,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2059 transitions. [2023-08-26 17:01:24,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 64.34375) internal successors, (2059), 32 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:24,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 157.0) internal successors, (5181), 33 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:24,867 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 157.0) internal successors, (5181), 33 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:24,867 INFO L175 Difference]: Start difference. First operand has 568 places, 2688 transitions, 91140 flow. Second operand 32 states and 2059 transitions. [2023-08-26 17:01:24,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 2912 transitions, 102184 flow [2023-08-26 17:01:37,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 2912 transitions, 100617 flow, removed 430 selfloop flow, removed 12 redundant places. [2023-08-26 17:01:37,555 INFO L231 Difference]: Finished difference. Result has 592 places, 2819 transitions, 100849 flow [2023-08-26 17:01:37,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=89499, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=100849, PETRI_PLACES=592, PETRI_TRANSITIONS=2819} [2023-08-26 17:01:37,558 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 564 predicate places. [2023-08-26 17:01:37,558 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 2819 transitions, 100849 flow [2023-08-26 17:01:37,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:37,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:01:37,558 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:01:37,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-26 17:01:37,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:01:37,760 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:01:37,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:01:37,761 INFO L85 PathProgramCache]: Analyzing trace with hash 623890660, now seen corresponding path program 30 times [2023-08-26 17:01:37,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:01:37,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522792962] [2023-08-26 17:01:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:01:37,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:01:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:01:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:01:37,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:01:37,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522792962] [2023-08-26 17:01:37,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522792962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:01:37,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558773510] [2023-08-26 17:01:37,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 17:01:37,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:01:37,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:01:37,861 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:01:37,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-26 17:01:37,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 17:01:37,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:01:37,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:01:37,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:01:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:01:38,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:01:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:01:38,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558773510] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:01:38,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:01:38,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2023-08-26 17:01:38,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635500359] [2023-08-26 17:01:38,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:01:38,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 17:01:38,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:01:38,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 17:01:38,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2023-08-26 17:01:38,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:01:38,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 2819 transitions, 100849 flow. Second operand has 21 states, 21 states have (on average 61.80952380952381) internal successors, (1298), 21 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:38,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:01:38,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:01:38,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:01:49,022 INFO L124 PetriNetUnfolderBase]: 7266/12965 cut-off events. [2023-08-26 17:01:49,022 INFO L125 PetriNetUnfolderBase]: For 677043/677043 co-relation queries the response was YES. [2023-08-26 17:01:49,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189356 conditions, 12965 events. 7266/12965 cut-off events. For 677043/677043 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 105628 event pairs, 552 based on Foata normal form. 26/12991 useless extension candidates. Maximal degree in co-relation 189167. Up to 3782 conditions per place. [2023-08-26 17:01:49,209 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 1296 selfloop transitions, 1808 changer transitions 20/3124 dead transitions. [2023-08-26 17:01:49,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 3124 transitions, 116325 flow [2023-08-26 17:01:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-26 17:01:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-26 17:01:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1935 transitions. [2023-08-26 17:01:49,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.410828025477707 [2023-08-26 17:01:49,211 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1935 transitions. [2023-08-26 17:01:49,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1935 transitions. [2023-08-26 17:01:49,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:01:49,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1935 transitions. [2023-08-26 17:01:49,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.5) internal successors, (1935), 30 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:49,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 157.0) internal successors, (4867), 31 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:49,217 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 157.0) internal successors, (4867), 31 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:01:49,217 INFO L175 Difference]: Start difference. First operand has 592 places, 2819 transitions, 100849 flow. Second operand 30 states and 1935 transitions. [2023-08-26 17:01:49,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 3124 transitions, 116325 flow [2023-08-26 17:02:06,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 3124 transitions, 113750 flow, removed 472 selfloop flow, removed 18 redundant places. [2023-08-26 17:02:06,467 INFO L231 Difference]: Finished difference. Result has 606 places, 3022 transitions, 109852 flow [2023-08-26 17:02:06,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=98428, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1593, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=109852, PETRI_PLACES=606, PETRI_TRANSITIONS=3022} [2023-08-26 17:02:06,470 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 578 predicate places. [2023-08-26 17:02:06,470 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 3022 transitions, 109852 flow [2023-08-26 17:02:06,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.80952380952381) internal successors, (1298), 21 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:06,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:02:06,471 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:02:06,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-26 17:02:06,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-26 17:02:06,676 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:02:06,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:02:06,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1998510288, now seen corresponding path program 31 times [2023-08-26 17:02:06,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:02:06,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085811548] [2023-08-26 17:02:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:02:06,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:02:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:02:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:02:06,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:02:06,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085811548] [2023-08-26 17:02:06,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085811548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:02:06,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012491216] [2023-08-26 17:02:06,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 17:02:06,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:02:06,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:02:06,785 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:02:06,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-26 17:02:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:02:06,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:02:06,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:02:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:02:06,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:02:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:02:07,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012491216] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:02:07,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:02:07,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-26 17:02:07,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006418039] [2023-08-26 17:02:07,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:02:07,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-26 17:02:07,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:02:07,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-26 17:02:07,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-08-26 17:02:07,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:02:07,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 3022 transitions, 109852 flow. Second operand has 23 states, 23 states have (on average 61.73913043478261) internal successors, (1420), 23 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:07,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:02:07,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:02:07,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:02:18,742 INFO L124 PetriNetUnfolderBase]: 7798/13959 cut-off events. [2023-08-26 17:02:18,743 INFO L125 PetriNetUnfolderBase]: For 751829/751829 co-relation queries the response was YES. [2023-08-26 17:02:18,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207573 conditions, 13959 events. 7798/13959 cut-off events. For 751829/751829 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 115198 event pairs, 548 based on Foata normal form. 10/13969 useless extension candidates. Maximal degree in co-relation 207381. Up to 3746 conditions per place. [2023-08-26 17:02:18,963 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 1292 selfloop transitions, 2076 changer transitions 3/3371 dead transitions. [2023-08-26 17:02:18,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 649 places, 3371 transitions, 127757 flow [2023-08-26 17:02:18,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-26 17:02:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-26 17:02:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2829 transitions. [2023-08-26 17:02:18,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095251881876086 [2023-08-26 17:02:18,966 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2829 transitions. [2023-08-26 17:02:18,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2829 transitions. [2023-08-26 17:02:18,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:02:18,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2829 transitions. [2023-08-26 17:02:18,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 64.29545454545455) internal successors, (2829), 44 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:18,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 157.0) internal successors, (7065), 45 states have internal predecessors, (7065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:18,973 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 157.0) internal successors, (7065), 45 states have internal predecessors, (7065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:18,973 INFO L175 Difference]: Start difference. First operand has 606 places, 3022 transitions, 109852 flow. Second operand 44 states and 2829 transitions. [2023-08-26 17:02:18,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 649 places, 3371 transitions, 127757 flow [2023-08-26 17:02:41,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 3371 transitions, 127230 flow, removed 215 selfloop flow, removed 5 redundant places. [2023-08-26 17:02:41,313 INFO L231 Difference]: Finished difference. Result has 649 places, 3269 transitions, 124322 flow [2023-08-26 17:02:41,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=109397, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=124322, PETRI_PLACES=649, PETRI_TRANSITIONS=3269} [2023-08-26 17:02:41,315 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 621 predicate places. [2023-08-26 17:02:41,315 INFO L495 AbstractCegarLoop]: Abstraction has has 649 places, 3269 transitions, 124322 flow [2023-08-26 17:02:41,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.73913043478261) internal successors, (1420), 23 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:41,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:02:41,316 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:02:41,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-26 17:02:41,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:02:41,520 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:02:41,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:02:41,520 INFO L85 PathProgramCache]: Analyzing trace with hash 839568420, now seen corresponding path program 32 times [2023-08-26 17:02:41,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:02:41,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65113344] [2023-08-26 17:02:41,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:02:41,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:02:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:02:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:02:41,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:02:41,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65113344] [2023-08-26 17:02:41,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65113344] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:02:41,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255491657] [2023-08-26 17:02:41,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:02:41,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:02:41,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:02:41,607 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:02:41,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-26 17:02:41,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:02:41,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:02:41,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:02:41,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:02:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:02:41,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:02:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:02:41,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255491657] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:02:41,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:02:41,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2023-08-26 17:02:41,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318879868] [2023-08-26 17:02:41,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:02:41,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 17:02:41,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:02:41,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 17:02:41,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-08-26 17:02:41,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:02:41,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 3269 transitions, 124322 flow. Second operand has 19 states, 19 states have (on average 61.89473684210526) internal successors, (1176), 19 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:41,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:02:41,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:02:41,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:02:57,698 INFO L124 PetriNetUnfolderBase]: 9265/16518 cut-off events. [2023-08-26 17:02:57,698 INFO L125 PetriNetUnfolderBase]: For 930611/930611 co-relation queries the response was YES. [2023-08-26 17:02:57,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251143 conditions, 16518 events. 9265/16518 cut-off events. For 930611/930611 co-relation queries the response was YES. Maximal size of possible extension queue 1225. Compared 138987 event pairs, 259 based on Foata normal form. 74/16592 useless extension candidates. Maximal degree in co-relation 250945. Up to 4275 conditions per place. [2023-08-26 17:02:57,959 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 634 selfloop transitions, 3353 changer transitions 33/4020 dead transitions. [2023-08-26 17:02:57,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 688 places, 4020 transitions, 156292 flow [2023-08-26 17:02:57,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-26 17:02:57,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-26 17:02:57,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2574 transitions. [2023-08-26 17:02:57,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098726114649682 [2023-08-26 17:02:57,963 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2574 transitions. [2023-08-26 17:02:57,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2574 transitions. [2023-08-26 17:02:57,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:02:57,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2574 transitions. [2023-08-26 17:02:57,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 64.35) internal successors, (2574), 40 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:57,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 157.0) internal successors, (6437), 41 states have internal predecessors, (6437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:57,970 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 157.0) internal successors, (6437), 41 states have internal predecessors, (6437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:02:57,971 INFO L175 Difference]: Start difference. First operand has 649 places, 3269 transitions, 124322 flow. Second operand 40 states and 2574 transitions. [2023-08-26 17:02:57,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 688 places, 4020 transitions, 156292 flow [2023-08-26 17:03:29,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 4020 transitions, 154653 flow, removed 366 selfloop flow, removed 15 redundant places. [2023-08-26 17:03:29,159 INFO L231 Difference]: Finished difference. Result has 685 places, 3913 transitions, 155620 flow [2023-08-26 17:03:29,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=122875, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2758, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=155620, PETRI_PLACES=685, PETRI_TRANSITIONS=3913} [2023-08-26 17:03:29,161 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 657 predicate places. [2023-08-26 17:03:29,161 INFO L495 AbstractCegarLoop]: Abstraction has has 685 places, 3913 transitions, 155620 flow [2023-08-26 17:03:29,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 61.89473684210526) internal successors, (1176), 19 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:03:29,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:03:29,162 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:03:29,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-26 17:03:29,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-26 17:03:29,362 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:03:29,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:03:29,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1368283390, now seen corresponding path program 33 times [2023-08-26 17:03:29,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:03:29,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024781032] [2023-08-26 17:03:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:03:29,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:03:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:03:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:03:29,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:03:29,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024781032] [2023-08-26 17:03:29,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024781032] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:03:29,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128226170] [2023-08-26 17:03:29,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 17:03:29,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:03:29,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:03:29,469 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:03:29,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-26 17:03:29,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 17:03:29,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:03:29,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:03:29,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:03:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:03:29,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:03:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:03:29,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128226170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:03:29,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:03:29,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-08-26 17:03:29,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671640026] [2023-08-26 17:03:29,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:03:29,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 17:03:29,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:03:29,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 17:03:29,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-08-26 17:03:29,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:03:29,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 3913 transitions, 155620 flow. Second operand has 25 states, 25 states have (on average 61.64) internal successors, (1541), 25 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:03:29,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:03:29,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:03:29,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:03:56,742 INFO L124 PetriNetUnfolderBase]: 12809/22864 cut-off events. [2023-08-26 17:03:56,742 INFO L125 PetriNetUnfolderBase]: For 1505060/1505060 co-relation queries the response was YES. [2023-08-26 17:03:57,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374076 conditions, 22864 events. 12809/22864 cut-off events. For 1505060/1505060 co-relation queries the response was YES. Maximal size of possible extension queue 1579. Compared 202566 event pairs, 747 based on Foata normal form. 50/22914 useless extension candidates. Maximal degree in co-relation 373865. Up to 5891 conditions per place. [2023-08-26 17:03:57,215 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 1494 selfloop transitions, 4029 changer transitions 55/5578 dead transitions. [2023-08-26 17:03:57,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 736 places, 5578 transitions, 236887 flow [2023-08-26 17:03:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-26 17:03:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-26 17:03:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3343 transitions. [2023-08-26 17:03:57,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40948064674179324 [2023-08-26 17:03:57,220 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3343 transitions. [2023-08-26 17:03:57,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3343 transitions. [2023-08-26 17:03:57,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:03:57,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3343 transitions. [2023-08-26 17:03:57,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 64.28846153846153) internal successors, (3343), 52 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:03:57,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 157.0) internal successors, (8321), 53 states have internal predecessors, (8321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:03:57,229 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 157.0) internal successors, (8321), 53 states have internal predecessors, (8321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:03:57,229 INFO L175 Difference]: Start difference. First operand has 685 places, 3913 transitions, 155620 flow. Second operand 52 states and 3343 transitions. [2023-08-26 17:03:57,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 736 places, 5578 transitions, 236887 flow [2023-08-26 17:05:11,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 723 places, 5578 transitions, 233910 flow, removed 1099 selfloop flow, removed 13 redundant places. [2023-08-26 17:05:11,525 INFO L231 Difference]: Finished difference. Result has 736 places, 5428 transitions, 233126 flow [2023-08-26 17:05:11,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=153524, PETRI_DIFFERENCE_MINUEND_PLACES=672, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3912, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=233126, PETRI_PLACES=736, PETRI_TRANSITIONS=5428} [2023-08-26 17:05:11,528 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 708 predicate places. [2023-08-26 17:05:11,528 INFO L495 AbstractCegarLoop]: Abstraction has has 736 places, 5428 transitions, 233126 flow [2023-08-26 17:05:11,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.64) internal successors, (1541), 25 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:05:11,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:05:11,529 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:05:11,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-26 17:05:11,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:05:11,729 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:05:11,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:05:11,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1443144722, now seen corresponding path program 34 times [2023-08-26 17:05:11,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:05:11,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268750795] [2023-08-26 17:05:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:05:11,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:05:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:05:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:05:11,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:05:11,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268750795] [2023-08-26 17:05:11,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268750795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:05:11,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708887614] [2023-08-26 17:05:11,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:05:11,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:05:11,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:05:11,823 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:05:11,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-26 17:05:11,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:05:11,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:05:11,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:05:11,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:05:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:05:11,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:05:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:05:12,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708887614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:05:12,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:05:12,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2023-08-26 17:05:12,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761541043] [2023-08-26 17:05:12,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:05:12,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 17:05:12,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:05:12,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 17:05:12,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-08-26 17:05:12,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:05:12,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 5428 transitions, 233126 flow. Second operand has 21 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:05:12,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:05:12,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:05:12,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:05:51,684 INFO L124 PetriNetUnfolderBase]: 12850/22835 cut-off events. [2023-08-26 17:05:51,684 INFO L125 PetriNetUnfolderBase]: For 1498674/1498674 co-relation queries the response was YES. [2023-08-26 17:05:52,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389100 conditions, 22835 events. 12850/22835 cut-off events. For 1498674/1498674 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 199461 event pairs, 4014 based on Foata normal form. 20/22855 useless extension candidates. Maximal degree in co-relation 388875. Up to 22076 conditions per place. [2023-08-26 17:05:52,265 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 5258 selfloop transitions, 274 changer transitions 7/5539 dead transitions. [2023-08-26 17:05:52,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 5539 transitions, 247351 flow [2023-08-26 17:05:52,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 17:05:52,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 17:05:52,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1420 transitions. [2023-08-26 17:05:52,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41111754487550667 [2023-08-26 17:05:52,267 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1420 transitions. [2023-08-26 17:05:52,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1420 transitions. [2023-08-26 17:05:52,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:05:52,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1420 transitions. [2023-08-26 17:05:52,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.54545454545455) internal successors, (1420), 22 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:05:52,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:05:52,270 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:05:52,270 INFO L175 Difference]: Start difference. First operand has 736 places, 5428 transitions, 233126 flow. Second operand 22 states and 1420 transitions. [2023-08-26 17:05:52,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 5539 transitions, 247351 flow [2023-08-26 17:07:28,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 741 places, 5539 transitions, 245847 flow, removed 538 selfloop flow, removed 16 redundant places. [2023-08-26 17:07:28,597 INFO L231 Difference]: Finished difference. Result has 743 places, 5503 transitions, 234795 flow [2023-08-26 17:07:28,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=231622, PETRI_DIFFERENCE_MINUEND_PLACES=720, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=234795, PETRI_PLACES=743, PETRI_TRANSITIONS=5503} [2023-08-26 17:07:28,601 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 715 predicate places. [2023-08-26 17:07:28,602 INFO L495 AbstractCegarLoop]: Abstraction has has 743 places, 5503 transitions, 234795 flow [2023-08-26 17:07:28,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:07:28,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:07:28,602 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:07:28,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-26 17:07:28,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-26 17:07:28,807 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:07:28,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:07:28,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1848676740, now seen corresponding path program 35 times [2023-08-26 17:07:28,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:07:28,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776503406] [2023-08-26 17:07:28,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:07:28,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:07:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:07:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:07:28,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:07:28,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776503406] [2023-08-26 17:07:28,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776503406] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:07:28,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494886389] [2023-08-26 17:07:28,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 17:07:28,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:07:28,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:07:28,913 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:07:28,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-26 17:07:29,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 17:07:29,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:07:29,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:07:29,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:07:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:07:29,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:07:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:07:29,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494886389] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:07:29,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:07:29,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2023-08-26 17:07:29,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462672144] [2023-08-26 17:07:29,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:07:29,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-26 17:07:29,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:07:29,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-26 17:07:29,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2023-08-26 17:07:29,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:07:29,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 5503 transitions, 234795 flow. Second operand has 23 states, 23 states have (on average 61.69565217391305) internal successors, (1419), 23 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:07:29,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:07:29,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:07:29,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:08:08,450 INFO L124 PetriNetUnfolderBase]: 12897/22949 cut-off events. [2023-08-26 17:08:08,450 INFO L125 PetriNetUnfolderBase]: For 1538853/1538853 co-relation queries the response was YES. [2023-08-26 17:08:08,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385837 conditions, 22949 events. 12897/22949 cut-off events. For 1538853/1538853 co-relation queries the response was YES. Maximal size of possible extension queue 1587. Compared 200972 event pairs, 3970 based on Foata normal form. 78/23027 useless extension candidates. Maximal degree in co-relation 385609. Up to 21715 conditions per place. [2023-08-26 17:08:08,944 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 5268 selfloop transitions, 310 changer transitions 20/5598 dead transitions. [2023-08-26 17:08:08,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 5598 transitions, 247241 flow [2023-08-26 17:08:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-26 17:08:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-26 17:08:08,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2066 transitions. [2023-08-26 17:08:08,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112261146496815 [2023-08-26 17:08:08,946 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2066 transitions. [2023-08-26 17:08:08,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2066 transitions. [2023-08-26 17:08:08,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:08:08,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2066 transitions. [2023-08-26 17:08:08,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 64.5625) internal successors, (2066), 32 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:08:08,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 157.0) internal successors, (5181), 33 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:08:08,950 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 157.0) internal successors, (5181), 33 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:08:08,950 INFO L175 Difference]: Start difference. First operand has 743 places, 5503 transitions, 234795 flow. Second operand 32 states and 2066 transitions. [2023-08-26 17:08:08,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 5598 transitions, 247241 flow [2023-08-26 17:09:42,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 748 places, 5598 transitions, 245402 flow, removed 527 selfloop flow, removed 25 redundant places. [2023-08-26 17:09:43,060 INFO L231 Difference]: Finished difference. Result has 754 places, 5518 transitions, 234164 flow [2023-08-26 17:09:43,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=232609, PETRI_DIFFERENCE_MINUEND_PLACES=717, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=234164, PETRI_PLACES=754, PETRI_TRANSITIONS=5518} [2023-08-26 17:09:43,064 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 726 predicate places. [2023-08-26 17:09:43,064 INFO L495 AbstractCegarLoop]: Abstraction has has 754 places, 5518 transitions, 234164 flow [2023-08-26 17:09:43,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.69565217391305) internal successors, (1419), 23 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:09:43,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:09:43,065 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:09:43,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-26 17:09:43,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-26 17:09:43,269 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:09:43,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:09:43,269 INFO L85 PathProgramCache]: Analyzing trace with hash 274082774, now seen corresponding path program 36 times [2023-08-26 17:09:43,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:09:43,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126142010] [2023-08-26 17:09:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:09:43,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:09:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:09:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:09:43,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:09:43,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126142010] [2023-08-26 17:09:43,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126142010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:09:43,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571201530] [2023-08-26 17:09:43,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 17:09:43,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:09:43,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:09:43,396 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:09:43,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-26 17:09:43,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 17:09:43,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:09:43,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-26 17:09:43,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:09:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:09:43,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:09:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:09:43,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571201530] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:09:43,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:09:43,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-08-26 17:09:43,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118444202] [2023-08-26 17:09:43,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:09:43,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 17:09:43,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:09:43,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 17:09:43,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 17:09:43,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 157 [2023-08-26 17:09:43,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 5518 transitions, 234164 flow. Second operand has 7 states, 7 states have (on average 74.71428571428571) internal successors, (523), 7 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:09:43,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:09:43,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 157 [2023-08-26 17:09:43,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:10:34,059 INFO L124 PetriNetUnfolderBase]: 15923/28206 cut-off events. [2023-08-26 17:10:34,059 INFO L125 PetriNetUnfolderBase]: For 1782472/1782482 co-relation queries the response was YES. [2023-08-26 17:10:34,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467548 conditions, 28206 events. 15923/28206 cut-off events. For 1782472/1782482 co-relation queries the response was YES. Maximal size of possible extension queue 2017. Compared 253262 event pairs, 772 based on Foata normal form. 15/28194 useless extension candidates. Maximal degree in co-relation 467328. Up to 18631 conditions per place. [2023-08-26 17:10:34,973 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 4943 selfloop transitions, 1932 changer transitions 315/7199 dead transitions. [2023-08-26 17:10:34,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 759 places, 7199 transitions, 314305 flow [2023-08-26 17:10:34,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:10:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:10:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 572 transitions. [2023-08-26 17:10:34,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204731574158326 [2023-08-26 17:10:34,974 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 572 transitions. [2023-08-26 17:10:34,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 572 transitions. [2023-08-26 17:10:34,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:10:34,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 572 transitions. [2023-08-26 17:10:34,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.71428571428571) internal successors, (572), 7 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:10:34,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:10:34,976 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:10:34,976 INFO L175 Difference]: Start difference. First operand has 754 places, 5518 transitions, 234164 flow. Second operand 7 states and 572 transitions. [2023-08-26 17:10:34,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 759 places, 7199 transitions, 314305 flow [2023-08-26 17:12:44,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 748 places, 7199 transitions, 312731 flow, removed 605 selfloop flow, removed 11 redundant places. [2023-08-26 17:12:45,132 INFO L231 Difference]: Finished difference. Result has 753 places, 6412 transitions, 267048 flow [2023-08-26 17:12:45,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=233270, PETRI_DIFFERENCE_MINUEND_PLACES=742, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=958, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=267048, PETRI_PLACES=753, PETRI_TRANSITIONS=6412} [2023-08-26 17:12:45,137 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 725 predicate places. [2023-08-26 17:12:45,137 INFO L495 AbstractCegarLoop]: Abstraction has has 753 places, 6412 transitions, 267048 flow [2023-08-26 17:12:45,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.71428571428571) internal successors, (523), 7 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:12:45,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:12:45,137 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:12:45,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-26 17:12:45,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-26 17:12:45,343 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 17:12:45,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:12:45,343 INFO L85 PathProgramCache]: Analyzing trace with hash -650066851, now seen corresponding path program 37 times [2023-08-26 17:12:45,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:12:45,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499245131] [2023-08-26 17:12:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:12:45,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:12:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:12:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:12:45,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:12:45,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499245131] [2023-08-26 17:12:45,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499245131] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:12:45,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491699219] [2023-08-26 17:12:45,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 17:12:45,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:12:45,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:12:45,479 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:12:45,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-26 17:12:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:12:45,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 17:12:45,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:12:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:12:45,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:12:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:12:45,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491699219] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:12:45,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:12:45,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-08-26 17:12:45,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100007074] [2023-08-26 17:12:45,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:12:45,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 17:12:45,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:12:45,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 17:12:45,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-08-26 17:12:45,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:12:45,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 6412 transitions, 267048 flow. Second operand has 20 states, 20 states have (on average 61.6) internal successors, (1232), 20 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:12:45,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:12:45,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:12:45,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-26 17:12:55,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 17:12:55,331 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2023-08-26 17:12:55,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-26 17:12:55,347 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 17:12:55,347 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 17:12:55,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-26 17:12:55,532 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 60/157 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 29481 conditions, 2174 events (1047/2173 cut-off events. For 125424/125424 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 19258 event pairs, 40 based on Foata normal form. 0/3062 useless extension candidates. Maximal degree in co-relation 29258. Up to 903 conditions per place.). [2023-08-26 17:12:55,533 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 17:12:55,533 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 17:12:55,533 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 17:12:55,533 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 17:12:55,533 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 17:12:55,533 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 17:12:55,533 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 17:12:55,534 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2023-08-26 17:12:55,534 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 17:12:55,534 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 17:12:55,534 INFO L445 BasicCegarLoop]: Path program histogram: [37, 6, 1, 1, 1, 1, 1, 1] [2023-08-26 17:12:55,536 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 17:12:55,536 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 17:12:55,538 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:12:55 BasicIcfg [2023-08-26 17:12:55,538 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 17:12:55,539 INFO L158 Benchmark]: Toolchain (without parser) took 834202.65ms. Allocated memory was 377.5MB in the beginning and 8.3GB in the end (delta: 7.9GB). Free memory was 353.8MB in the beginning and 5.6GB in the end (delta: -5.3GB). Peak memory consumption was 5.0GB. Max. memory is 16.0GB. [2023-08-26 17:12:55,539 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 377.5MB. Free memory is still 353.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:12:55,539 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.60ms. Allocated memory is still 377.5MB. Free memory was 353.8MB in the beginning and 342.9MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 17:12:55,540 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.98ms. Allocated memory is still 377.5MB. Free memory was 342.9MB in the beginning and 341.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:12:55,540 INFO L158 Benchmark]: Boogie Preprocessor took 32.43ms. Allocated memory is still 377.5MB. Free memory was 341.3MB in the beginning and 340.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:12:55,540 INFO L158 Benchmark]: RCFGBuilder took 414.65ms. Allocated memory is still 377.5MB. Free memory was 340.3MB in the beginning and 325.1MB in the end (delta: 15.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 17:12:55,541 INFO L158 Benchmark]: TraceAbstraction took 833511.02ms. Allocated memory was 377.5MB in the beginning and 8.3GB in the end (delta: 7.9GB). Free memory was 324.6MB in the beginning and 5.6GB in the end (delta: -5.3GB). Peak memory consumption was 4.9GB. Max. memory is 16.0GB. [2023-08-26 17:12:55,542 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 377.5MB. Free memory is still 353.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 193.60ms. Allocated memory is still 377.5MB. Free memory was 353.8MB in the beginning and 342.9MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 45.98ms. Allocated memory is still 377.5MB. Free memory was 342.9MB in the beginning and 341.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.43ms. Allocated memory is still 377.5MB. Free memory was 341.3MB in the beginning and 340.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 414.65ms. Allocated memory is still 377.5MB. Free memory was 340.3MB in the beginning and 325.1MB in the end (delta: 15.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 833511.02ms. Allocated memory was 377.5MB in the beginning and 8.3GB in the end (delta: 7.9GB). Free memory was 324.6MB in the beginning and 5.6GB in the end (delta: -5.3GB). Peak memory consumption was 4.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 75 PlacesBefore, 28 PlacesAfterwards, 73 TransitionsBefore, 23 TransitionsAfterwards, 748 CoEnabledTransitionPairs, 5 FixpointIterations, 36 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 73 TotalNumberOfCompositions, 781 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 746, independent: 742, independent conditional: 0, independent unconditional: 742, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 392, independent: 390, independent conditional: 0, independent unconditional: 390, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 746, independent: 352, independent conditional: 0, independent unconditional: 352, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 392, unknown conditional: 0, unknown unconditional: 392] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 60/157 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 29481 conditions, 2174 events (1047/2173 cut-off events. For 125424/125424 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 19258 event pairs, 40 based on Foata normal form. 0/3062 useless extension candidates. Maximal degree in co-relation 29258. Up to 903 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 60/157 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 29481 conditions, 2174 events (1047/2173 cut-off events. For 125424/125424 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 19258 event pairs, 40 based on Foata normal form. 0/3062 useless extension candidates. Maximal degree in co-relation 29258. Up to 903 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 60/157 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 29481 conditions, 2174 events (1047/2173 cut-off events. For 125424/125424 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 19258 event pairs, 40 based on Foata normal form. 0/3062 useless extension candidates. Maximal degree in co-relation 29258. Up to 903 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 60/157 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 29481 conditions, 2174 events (1047/2173 cut-off events. For 125424/125424 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 19258 event pairs, 40 based on Foata normal form. 0/3062 useless extension candidates. Maximal degree in co-relation 29258. Up to 903 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 60/157 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 29481 conditions, 2174 events (1047/2173 cut-off events. For 125424/125424 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 19258 event pairs, 40 based on Foata normal form. 0/3062 useless extension candidates. Maximal degree in co-relation 29258. Up to 903 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 60/157 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 29481 conditions, 2174 events (1047/2173 cut-off events. For 125424/125424 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 19258 event pairs, 40 based on Foata normal form. 0/3062 useless extension candidates. Maximal degree in co-relation 29258. Up to 903 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 60/157 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 29481 conditions, 2174 events (1047/2173 cut-off events. For 125424/125424 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 19258 event pairs, 40 based on Foata normal form. 0/3062 useless extension candidates. Maximal degree in co-relation 29258. Up to 903 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 60/157 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 29481 conditions, 2174 events (1047/2173 cut-off events. For 125424/125424 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 19258 event pairs, 40 based on Foata normal form. 0/3062 useless extension candidates. Maximal degree in co-relation 29258. Up to 903 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 60/157 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 29481 conditions, 2174 events (1047/2173 cut-off events. For 125424/125424 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 19258 event pairs, 40 based on Foata normal form. 0/3062 useless extension candidates. Maximal degree in co-relation 29258. Up to 903 conditions per place.). - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 60/157 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 29481 conditions, 2174 events (1047/2173 cut-off events. For 125424/125424 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 19258 event pairs, 40 based on Foata normal form. 0/3062 useless extension candidates. Maximal degree in co-relation 29258. Up to 903 conditions per place.). - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 60/157 universal loopers) in iteration 49,while PetriNetUnfolder was constructing finite prefix that currently has 29481 conditions, 2174 events (1047/2173 cut-off events. For 125424/125424 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 19258 event pairs, 40 based on Foata normal form. 0/3062 useless extension candidates. Maximal degree in co-relation 29258. Up to 903 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 102 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: 833.4s, OverallIterations: 49, TraceHistogramMax: 5, PathProgramHistogramMax: 37, EmptinessCheckTime: 0.0s, AutomataDifference: 810.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2082 SdHoareTripleChecker+Valid, 6.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2082 mSDsluCounter, 497 SdHoareTripleChecker+Invalid, 5.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 327 mSDsCounter, 322 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13385 IncrementalHoareTripleChecker+Invalid, 13707 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 322 mSolverCounterUnsat, 170 mSDtfsCounter, 13385 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2280 GetRequests, 1021 SyntacticMatches, 212 SemanticMatches, 1047 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11392 ImplicationChecksByTransitivity, 8.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=267048occurred in iteration=48, InterpolantAutomatonStates: 913, 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: 0.4s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 1528 NumberOfCodeBlocks, 1510 NumberOfCodeBlocksAsserted, 138 NumberOfCheckSat, 2127 ConstructedInterpolants, 0 QuantifiedInterpolants, 7057 SizeOfPredicates, 36 NumberOfNonLiveVariables, 5812 ConjunctsInSsa, 364 ConjunctsInUnsatCore, 129 InterpolantComputations, 9 PerfectInterpolantSequences, 419/1281 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown